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[2620:137:e000::1:20]) by mx.google.com with ESMTP id gc37-20020a1709072b2500b0087a9f5fa831si16048355ejc.926.2023.02.13.21.08.04; Mon, 13 Feb 2023 21:08:26 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20210112 header.b="Zji4td/P"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231190AbjBNFFD (ORCPT + 99 others); Tue, 14 Feb 2023 00:05:03 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35218 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229597AbjBNFE7 (ORCPT ); Tue, 14 Feb 2023 00:04:59 -0500 Received: from mail-pj1-x1036.google.com (mail-pj1-x1036.google.com [IPv6:2607:f8b0:4864:20::1036]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1C68E59C6; Mon, 13 Feb 2023 21:04:58 -0800 (PST) Received: by mail-pj1-x1036.google.com with SMTP id gd1so3232871pjb.1; Mon, 13 Feb 2023 21:04:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=t1Kr3kXQgwcsxlycuRjDDdXYyaX+gwzvSvU7orwm0JQ=; b=Zji4td/PdUoNxBouU7yjKpYxncHkR948LtYG/exZDU9o1up4MPne9yzjX6bdhJIwxn /3C304SuisL22aWE6Cjm/DsjQWW7ek4+zvAJnfILjb/SRojvaVo0E/dQCFNMRyIXudrA fuJsHWGc6ORL2JHlEcxX7pDxhSj9OqoLo5RWVdV7tZlXJfKJXpCGiudme71G2HntbAll 6GKgiEoqyqH+pNgykrDxyj6xLNxpbS6UosKT2H293ID8AFspq9SJIOK6kIgUzlJWwbgE rO7MVYhGqe3jChQNxlB1LdcHfk1q9uLL+lSv4ivmdmkvfNxmU9w+ah676oyiWfRTxyK9 DytA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=t1Kr3kXQgwcsxlycuRjDDdXYyaX+gwzvSvU7orwm0JQ=; b=4q4RnuWFIDYKaA0K4RKyYPObTf9zfbfbSITk+z7/pQSWTc5TvGkV1rDtFs+aAcuISD QnmtWCvwU5IbXWT2Fz6O3pbgt9dQA7AZWJGtXkQaj1oL8wCF+AWW4f3DDLUyo041Qb3P 0Qe5WxjO8GLa1JiYU/a018Zqjxj2X56X0G5zZkq1wIQCrrh81KKAVimTvIn33LHTVYtD +xhnuVsI/pQnNG4gxKARp3MUrElbqBh4MOo/Nqb3AGli46Mvj8do0njQLCBl2aOFrsy+ MTvhMNMsGuZlV9ZuozedaaMNd3TAARxIrGbAvlQvHFuZ1m3WJPvDIvlkI8g9kKfyumR5 wFnQ== X-Gm-Message-State: AO0yUKWXuR1DMR3O9U08RBRonZOgGPqVfY1TNg1lkigIGf8rpUZx3zDW usx5vW6aC+W6CJgW3b9ehRo= X-Received: by 2002:a17:902:ce8c:b0:199:2236:ae88 with SMTP id f12-20020a170902ce8c00b001992236ae88mr1404771plg.43.1676351097427; Mon, 13 Feb 2023 21:04:57 -0800 (PST) Received: from moohyul.svl.corp.google.com ([2620:15c:2d4:203:de3c:c4c2:3f15:764d]) by smtp.gmail.com with ESMTPSA id k18-20020a170902761200b001932a9e4f2csm9045593pll.255.2023.02.13.21.04.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Feb 2023 21:04:57 -0800 (PST) Sender: Namhyung Kim From: Namhyung Kim To: Arnaldo Carvalho de Melo , Jiri Olsa Cc: Peter Zijlstra , Ingo Molnar , Ian Rogers , Adrian Hunter , Andi Kleen , Kan Liang , Song Liu , Stephane Eranian , Ravi Bangoria , Leo Yan , James Clark , Hao Luo , LKML , linux-perf-users@vger.kernel.org, bpf@vger.kernel.org Subject: [PATCH 1/7] perf bpf filter: Introduce basic BPF filter expression Date: Mon, 13 Feb 2023 21:04:46 -0800 Message-Id: <20230214050452.26390-2-namhyung@kernel.org> X-Mailer: git-send-email 2.39.1.581.gbfd45094c4-goog In-Reply-To: <20230214050452.26390-1-namhyung@kernel.org> References: <20230214050452.26390-1-namhyung@kernel.org> MIME-Version: 1.0 X-Spam-Status: No, score=-1.5 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1757781748167181340?= X-GMAIL-MSGID: =?utf-8?q?1757781748167181340?= This implements a tiny parser for the filter expressions used for BPF. Each expression will be converted to struct perf_bpf_filter_expr and be passed to a BPF map. For now, I'd like to start with the very basic comparisons like EQ or GT. The LHS should be a term for sample data and the RHS is a number. The expressions are connected by a comma. For example, period > 10000 ip < 0x1000000000000, cpu == 3 Signed-off-by: Namhyung Kim --- tools/perf/util/Build | 16 +++++++++ tools/perf/util/bpf-filter.c | 37 +++++++++++++++++++ tools/perf/util/bpf-filter.h | 36 +++++++++++++++++++ tools/perf/util/bpf-filter.l | 70 ++++++++++++++++++++++++++++++++++++ tools/perf/util/bpf-filter.y | 52 +++++++++++++++++++++++++++ 5 files changed, 211 insertions(+) create mode 100644 tools/perf/util/bpf-filter.c create mode 100644 tools/perf/util/bpf-filter.h create mode 100644 tools/perf/util/bpf-filter.l create mode 100644 tools/perf/util/bpf-filter.y diff --git a/tools/perf/util/Build b/tools/perf/util/Build index 918b501f9bd8..6af73fb5c797 100644 --- a/tools/perf/util/Build +++ b/tools/perf/util/Build @@ -154,6 +154,9 @@ perf-$(CONFIG_PERF_BPF_SKEL) += bpf_counter.o perf-$(CONFIG_PERF_BPF_SKEL) += bpf_counter_cgroup.o perf-$(CONFIG_PERF_BPF_SKEL) += bpf_ftrace.o perf-$(CONFIG_PERF_BPF_SKEL) += bpf_off_cpu.o +perf-$(CONFIG_PERF_BPF_SKEL) += bpf-filter.o +perf-$(CONFIG_PERF_BPF_SKEL) += bpf-filter-flex.o +perf-$(CONFIG_PERF_BPF_SKEL) += bpf-filter-bison.o ifeq ($(CONFIG_LIBTRACEEVENT),y) perf-$(CONFIG_PERF_BPF_SKEL) += bpf_lock_contention.o @@ -266,6 +269,16 @@ $(OUTPUT)util/pmu-bison.c $(OUTPUT)util/pmu-bison.h: util/pmu.y $(Q)$(call echo-cmd,bison)$(BISON) -v $< -d $(PARSER_DEBUG_BISON) $(BISON_FILE_PREFIX_MAP) \ -o $(OUTPUT)util/pmu-bison.c -p perf_pmu_ +$(OUTPUT)util/bpf-filter-flex.c $(OUTPUT)util/bpf-filter-flex.h: util/bpf-filter.l $(OUTPUT)util/bpf-filter-bison.c + $(call rule_mkdir) + $(Q)$(call echo-cmd,flex)$(FLEX) -o $(OUTPUT)util/bpf-filter-flex.c \ + --header-file=$(OUTPUT)util/bpf-filter-flex.h $(PARSER_DEBUG_FLEX) $< + +$(OUTPUT)util/bpf-filter-bison.c $(OUTPUT)util/bpf-filter-bison.h: util/bpf-filter.y + $(call rule_mkdir) + $(Q)$(call echo-cmd,bison)$(BISON) -v $< -d $(PARSER_DEBUG_BISON) $(BISON_FILE_PREFIX_MAP) \ + -o $(OUTPUT)util/bpf-filter-bison.c -p perf_bpf_filter_ + FLEX_GE_26 := $(shell expr $(shell $(FLEX) --version | sed -e 's/flex \([0-9]\+\).\([0-9]\+\)/\1\2/g') \>\= 26) ifeq ($(FLEX_GE_26),1) flex_flags := -Wno-switch-enum -Wno-switch-default -Wno-unused-function -Wno-redundant-decls -Wno-sign-compare -Wno-unused-parameter -Wno-missing-prototypes -Wno-missing-declarations @@ -279,6 +292,7 @@ endif CFLAGS_parse-events-flex.o += $(flex_flags) CFLAGS_pmu-flex.o += $(flex_flags) CFLAGS_expr-flex.o += $(flex_flags) +CFLAGS_bpf-filter-flex.o += $(flex_flags) bison_flags := -DYYENABLE_NLS=0 BISON_GE_35 := $(shell expr $(shell $(BISON) --version | grep bison | sed -e 's/.\+ \([0-9]\+\).\([0-9]\+\)/\1\2/g') \>\= 35) @@ -290,10 +304,12 @@ endif CFLAGS_parse-events-bison.o += $(bison_flags) CFLAGS_pmu-bison.o += -DYYLTYPE_IS_TRIVIAL=0 $(bison_flags) CFLAGS_expr-bison.o += -DYYLTYPE_IS_TRIVIAL=0 $(bison_flags) +CFLAGS_bpf-filter-bison.o += -DYYLTYPE_IS_TRIVIAL=0 $(bison_flags) $(OUTPUT)util/parse-events.o: $(OUTPUT)util/parse-events-flex.c $(OUTPUT)util/parse-events-bison.c $(OUTPUT)util/pmu.o: $(OUTPUT)util/pmu-flex.c $(OUTPUT)util/pmu-bison.c $(OUTPUT)util/expr.o: $(OUTPUT)util/expr-flex.c $(OUTPUT)util/expr-bison.c +$(OUTPUT)util/bpf-filter.o: $(OUTPUT)util/bpf-filter-flex.c $(OUTPUT)util/bpf-filter-bison.c CFLAGS_bitmap.o += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))" CFLAGS_find_bit.o += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))" diff --git a/tools/perf/util/bpf-filter.c b/tools/perf/util/bpf-filter.c new file mode 100644 index 000000000000..6b1148fcfb0e --- /dev/null +++ b/tools/perf/util/bpf-filter.c @@ -0,0 +1,37 @@ +// SPDX-License-Identifier: GPL-2.0 +#include + +#include "util/bpf-filter.h" +#include "util/bpf-filter-flex.h" +#include "util/bpf-filter-bison.h" + +struct perf_bpf_filter_expr *perf_bpf_filter_expr__new(unsigned long sample_flags, + enum perf_bpf_filter_op op, + unsigned long val) +{ + struct perf_bpf_filter_expr *expr; + + expr = malloc(sizeof(*expr)); + if (expr != NULL) { + expr->sample_flags = sample_flags; + expr->op = op; + expr->val = val; + } + return expr; +} + +int perf_bpf_filter__parse(struct list_head *expr_head, const char *str) +{ + YY_BUFFER_STATE buffer; + int ret; + + buffer = perf_bpf_filter__scan_string(str); + + ret = perf_bpf_filter_parse(expr_head); + + perf_bpf_filter__flush_buffer(buffer); + perf_bpf_filter__delete_buffer(buffer); + perf_bpf_filter_lex_destroy(); + + return ret; +} \ No newline at end of file diff --git a/tools/perf/util/bpf-filter.h b/tools/perf/util/bpf-filter.h new file mode 100644 index 000000000000..fd5b1164a322 --- /dev/null +++ b/tools/perf/util/bpf-filter.h @@ -0,0 +1,36 @@ +// SPDX-License-Identifier: GPL-2.0 +#ifndef PERF_UTIL_BPF_FILTER_H +#define PERF_UTIL_BPF_FILTER_H + +#include + +enum perf_bpf_filter_op { + PBF_OP_EQ, + PBF_OP_NEQ, + PBF_OP_GT, + PBF_OP_GE, + PBF_OP_LT, + PBF_OP_LE, + PBF_OP_AND, +}; + +struct perf_bpf_filter_expr { + struct list_head list; + enum perf_bpf_filter_op op; + unsigned long sample_flags; + unsigned long val; +}; + +#ifdef HAVE_BPF_SKEL +struct perf_bpf_filter_expr *perf_bpf_filter_expr__new(unsigned long sample_flags, + enum perf_bpf_filter_op op, + unsigned long val); +int perf_bpf_filter__parse(struct list_head *expr_head, const char *str); +#else /* !HAVE_BPF_SKEL */ +static inline int perf_bpf_filter__parse(struct list_head *expr_head __maybe_unused, + const char *str __maybe_unused) +{ + return -ENOSYS; +} +#endif /* HAVE_BPF_SKEL*/ +#endif /* PERF_UTIL_BPF_FILTER_H */ \ No newline at end of file diff --git a/tools/perf/util/bpf-filter.l b/tools/perf/util/bpf-filter.l new file mode 100644 index 000000000000..34c6a9fd4fa4 --- /dev/null +++ b/tools/perf/util/bpf-filter.l @@ -0,0 +1,70 @@ +%option prefix="perf_bpf_filter_" +%option noyywrap + +%{ +#include +#include + +#include "bpf-filter.h" +#include "bpf-filter-bison.h" + +static int sample(unsigned long sample_flag) +{ + perf_bpf_filter_lval.sample = sample_flag; + return BFT_SAMPLE; +} + +static int operator(enum perf_bpf_filter_op op) +{ + perf_bpf_filter_lval.op = op; + return BFT_OP; +} + +static int value(int base) +{ + long num; + + errno = 0; + num = strtoul(perf_bpf_filter_text, NULL, base); + if (errno) + return BFT_ERROR; + + perf_bpf_filter_lval.num = num; + return BFT_NUM; +} + +%} + +num_dec [0-9]+ +num_hex 0[Xx][0-9a-fA-F]+ + +%% + +{num_dec} { return value(10); } +{num_hex} { return value(16); } + +ip { return sample(PERF_SAMPLE_IP); } +id { return sample(PERF_SAMPLE_ID); } +tid { return sample(PERF_SAMPLE_TID); } +cpu { return sample(PERF_SAMPLE_CPU); } +time { return sample(PERF_SAMPLE_TIME); } +addr { return sample(PERF_SAMPLE_ADDR); } +period { return sample(PERF_SAMPLE_PERIOD); } +txn { return sample(PERF_SAMPLE_TRANSACTION); } +weight { return sample(PERF_SAMPLE_WEIGHT); } +phys_addr { return sample(PERF_SAMPLE_PHYS_ADDR); } +code_pgsz { return sample(PERF_SAMPLE_CODE_PAGE_SIZE); } +data_pgsz { return sample(PERF_SAMPLE_DATA_PAGE_SIZE); } + +"==" { return operator(PBF_OP_EQ); } +"!=" { return operator(PBF_OP_NEQ); } +">" { return operator(PBF_OP_GT); } +"<" { return operator(PBF_OP_LT); } +">=" { return operator(PBF_OP_GE); } +"<=" { return operator(PBF_OP_LE); } +"&" { return operator(PBF_OP_AND); } + +"," { return ','; } +. { } + +%% diff --git a/tools/perf/util/bpf-filter.y b/tools/perf/util/bpf-filter.y new file mode 100644 index 000000000000..0bf36ec30abf --- /dev/null +++ b/tools/perf/util/bpf-filter.y @@ -0,0 +1,52 @@ +%parse-param {struct list_head *expr_head} + +%{ + +#include +#include +#include +#include +#include "bpf-filter.h" + +static void perf_bpf_filter_error(struct list_head *expr __maybe_unused, + char const *msg) +{ + printf("perf_bpf_filter: %s\n", msg); +} + +%} + +%union +{ + unsigned long num; + unsigned long sample; + enum perf_bpf_filter_op op; + struct perf_bpf_filter_expr *expr; +} + +%token BFT_SAMPLE BFT_OP BFT_ERROR BFT_NUM +%type filter_term +%type BFT_SAMPLE +%type BFT_OP +%type BFT_NUM + +%% + +filter: +filter ',' filter_term +{ + list_add(&$3->list, expr_head); +} +| +filter_term +{ + list_add(&$1->list, expr_head); +} + +filter_term: +BFT_SAMPLE BFT_OP BFT_NUM +{ + $$ = perf_bpf_filter_expr__new($1, $2, $3); +} + +%% From patchwork Tue Feb 14 05:04:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Namhyung Kim X-Patchwork-Id: 56664 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:eb09:0:0:0:0:0 with SMTP id s9csp2767747wrn; Mon, 13 Feb 2023 21:08:43 -0800 (PST) X-Google-Smtp-Source: AK7set/lHVCTLmw4FimLmCtXSiM6uU4OrD9MCImKHgGTjTWLL5F/T1mPf9RQN0Z8li2XG1HJqeDI X-Received: by 2002:a50:c354:0:b0:4a2:588f:b3c5 with SMTP id q20-20020a50c354000000b004a2588fb3c5mr1102872edb.21.1676351323496; Mon, 13 Feb 2023 21:08:43 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1676351323; cv=none; d=google.com; s=arc-20160816; b=b0iBGI4X7i7RRTb+urISIjDmzdKZ3fkrOIqffQWex2AfF3tHWD/3VbiSqKz5ElNFtp Eftpu/QbgXmXG7SQBw1nKnwepqARtq37Rtdr4lIPfMeIT5aQNQAHEoenZKCIqqRdq9ue 5w0dH57m7h25w5m5jlpTUZq5tUWv/4gdWSqqBiI5SCDryjoEyjtoRZbgj1qIjMjSOeKt f+xGFmnAbwQLpFJUrNUi4IPv0u4fnnf3xmditqq9AGeh0k66kulthhmdmxxb7b9UkCmy X7+DdJ+k5iqysewSiAexcKqH53shsWgXjW/S1bvQvAqhtW0l2/0CCbtc6BNNBKlz2sgU a/PQ== ARC-Message-Signature: i=1; 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It'd iterate the filters map and compare the sample value according to the expression. If any of them fails, the sample would be dropped. Also it needs to have the corresponding sample data for the expression so it compares data->sample_flags with the given value. To access the sample data, it uses the bpf_cast_to_kern_ctx() kfunc which was added in v6.2 kernel. Signed-off-by: Namhyung Kim --- tools/perf/Makefile.perf | 2 +- tools/perf/util/bpf-filter.c | 71 +++++++++++ tools/perf/util/bpf-filter.h | 24 ++-- tools/perf/util/bpf_skel/sample-filter.h | 24 ++++ tools/perf/util/bpf_skel/sample_filter.bpf.c | 118 +++++++++++++++++++ tools/perf/util/evsel.h | 7 +- 6 files changed, 234 insertions(+), 12 deletions(-) create mode 100644 tools/perf/util/bpf_skel/sample-filter.h create mode 100644 tools/perf/util/bpf_skel/sample_filter.bpf.c diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index bac9272682b7..474af4adea95 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -1047,7 +1047,7 @@ SKELETONS := $(SKEL_OUT)/bpf_prog_profiler.skel.h SKELETONS += $(SKEL_OUT)/bperf_leader.skel.h $(SKEL_OUT)/bperf_follower.skel.h SKELETONS += $(SKEL_OUT)/bperf_cgroup.skel.h $(SKEL_OUT)/func_latency.skel.h SKELETONS += $(SKEL_OUT)/off_cpu.skel.h $(SKEL_OUT)/lock_contention.skel.h -SKELETONS += $(SKEL_OUT)/kwork_trace.skel.h +SKELETONS += $(SKEL_OUT)/kwork_trace.skel.h $(SKEL_OUT)/sample_filter.skel.h $(SKEL_TMP_OUT) $(LIBAPI_OUTPUT) $(LIBBPF_OUTPUT) $(LIBPERF_OUTPUT) $(LIBSUBCMD_OUTPUT) $(LIBSYMBOL_OUTPUT): $(Q)$(MKDIR) -p $@ diff --git a/tools/perf/util/bpf-filter.c b/tools/perf/util/bpf-filter.c index 6b1148fcfb0e..f47420cf81c9 100644 --- a/tools/perf/util/bpf-filter.c +++ b/tools/perf/util/bpf-filter.c @@ -1,10 +1,81 @@ // SPDX-License-Identifier: GPL-2.0 #include +#include +#include +#include + +#include "util/debug.h" +#include "util/evsel.h" + #include "util/bpf-filter.h" #include "util/bpf-filter-flex.h" #include "util/bpf-filter-bison.h" +#include "bpf_skel/sample-filter.h" +#include "bpf_skel/sample_filter.skel.h" + +#define FD(e, x, y) (*(int *)xyarray__entry(e->core.fd, x, y)) + +int perf_bpf_filter__prepare(struct evsel *evsel) +{ + int i, x, y, fd; + struct sample_filter_bpf *skel; + struct bpf_program *prog; + struct bpf_link *link; + struct perf_bpf_filter_expr *expr; + + skel = sample_filter_bpf__open(); + if (!skel) { + pr_err("Failed to open perf sample-filter BPF skeleton\n"); + return -1; + } + + bpf_map__set_max_entries(skel->maps.filters, MAX_FILTERS); + + if (sample_filter_bpf__load(skel) < 0) { + pr_err("Failed to load perf sample-filter BPF skeleton\n"); + return -1; + } + + i = 0; + fd = bpf_map__fd(skel->maps.filters); + list_for_each_entry(expr, &evsel->bpf_filters, list) { + struct perf_bpf_filter_entry entry = { + .op = expr->op, + .flags = expr->sample_flags, + .value = expr->val, + }; + bpf_map_update_elem(fd, &i, &entry, BPF_ANY); + i++; + } + + prog = skel->progs.perf_sample_filter; + for (x = 0; x < xyarray__max_x(evsel->core.fd); x++) { + for (y = 0; y < xyarray__max_y(evsel->core.fd); y++) { + link = bpf_program__attach_perf_event(prog, FD(evsel, x, y)); + if (IS_ERR(link)) { + pr_err("Failed to attach perf sample-filter program\n"); + return PTR_ERR(link); + } + } + } + evsel->bpf_skel = skel; + return 0; +} + +int perf_bpf_filter__destroy(struct evsel *evsel) +{ + struct perf_bpf_filter_expr *expr, *tmp; + + list_for_each_entry_safe(expr, tmp, &evsel->bpf_filters, list) { + list_del(&expr->list); + free(expr); + } + sample_filter_bpf__destroy(evsel->bpf_skel); + return 0; +} + struct perf_bpf_filter_expr *perf_bpf_filter_expr__new(unsigned long sample_flags, enum perf_bpf_filter_op op, unsigned long val) diff --git a/tools/perf/util/bpf-filter.h b/tools/perf/util/bpf-filter.h index fd5b1164a322..6077930073f9 100644 --- a/tools/perf/util/bpf-filter.h +++ b/tools/perf/util/bpf-filter.h @@ -4,15 +4,7 @@ #include -enum perf_bpf_filter_op { - PBF_OP_EQ, - PBF_OP_NEQ, - PBF_OP_GT, - PBF_OP_GE, - PBF_OP_LT, - PBF_OP_LE, - PBF_OP_AND, -}; +#include "bpf_skel/sample-filter.h" struct perf_bpf_filter_expr { struct list_head list; @@ -21,16 +13,30 @@ struct perf_bpf_filter_expr { unsigned long val; }; +struct evsel; + #ifdef HAVE_BPF_SKEL struct perf_bpf_filter_expr *perf_bpf_filter_expr__new(unsigned long sample_flags, enum perf_bpf_filter_op op, unsigned long val); int perf_bpf_filter__parse(struct list_head *expr_head, const char *str); +int perf_bpf_filter__prepare(struct evsel *evsel); +int perf_bpf_filter__destroy(struct evsel *evsel); + #else /* !HAVE_BPF_SKEL */ + static inline int perf_bpf_filter__parse(struct list_head *expr_head __maybe_unused, const char *str __maybe_unused) { return -ENOSYS; } +static inline int perf_bpf_filter__prepare(struct evsel *evsel) +{ + return -ENOSYS; +} +static inline int perf_bpf_filter__destroy(struct evsel *evsel) +{ + return -ENOSYS; +} #endif /* HAVE_BPF_SKEL*/ #endif /* PERF_UTIL_BPF_FILTER_H */ \ No newline at end of file diff --git a/tools/perf/util/bpf_skel/sample-filter.h b/tools/perf/util/bpf_skel/sample-filter.h new file mode 100644 index 000000000000..862060bfda14 --- /dev/null +++ b/tools/perf/util/bpf_skel/sample-filter.h @@ -0,0 +1,24 @@ +#ifndef PERF_UTIL_BPF_SKEL_SAMPLE_FILTER_H +#define PERF_UTIL_BPF_SKEL_SAMPLE_FILTER_H + +#define MAX_FILTERS 32 + +/* supported filter operations */ +enum perf_bpf_filter_op { + PBF_OP_EQ, + PBF_OP_NEQ, + PBF_OP_GT, + PBF_OP_GE, + PBF_OP_LT, + PBF_OP_LE, + PBF_OP_AND +}; + +/* BPF map entry for filtering */ +struct perf_bpf_filter_entry { + enum perf_bpf_filter_op op; + __u64 flags; + __u64 value; +}; + +#endif /* PERF_UTIL_BPF_SKEL_SAMPLE_FILTER_H */ \ No newline at end of file diff --git a/tools/perf/util/bpf_skel/sample_filter.bpf.c b/tools/perf/util/bpf_skel/sample_filter.bpf.c new file mode 100644 index 000000000000..1aa6a4cacd51 --- /dev/null +++ b/tools/perf/util/bpf_skel/sample_filter.bpf.c @@ -0,0 +1,118 @@ +// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +// Copyright (c) 2023 Google +#include "vmlinux.h" +#include +#include +#include + +#include "sample-filter.h" + +/* BPF map that will be filled by user space */ +struct filters { + __uint(type, BPF_MAP_TYPE_ARRAY); + __type(key, int); + __type(value, struct perf_bpf_filter_entry); + __uint(max_entries, MAX_FILTERS); +} filters SEC(".maps"); + +int dropped; + +void *bpf_cast_to_kern_ctx(void *) __ksym; + +/* helper function to return the given perf sample data */ +static inline __u64 perf_get_sample(struct bpf_perf_event_data_kern *kctx, + struct perf_bpf_filter_entry *entry) +{ + if ((kctx->data->sample_flags & entry->flags) == 0) + return 0; + + switch (entry->flags) { + case PERF_SAMPLE_IP: + return kctx->data->ip; + case PERF_SAMPLE_ID: + return kctx->data->id; + case PERF_SAMPLE_TID: + return kctx->data->tid_entry.tid; + case PERF_SAMPLE_CPU: + return kctx->data->cpu_entry.cpu; + case PERF_SAMPLE_TIME: + return kctx->data->time; + case PERF_SAMPLE_ADDR: + return kctx->data->addr; + case PERF_SAMPLE_PERIOD: + return kctx->data->period; + case PERF_SAMPLE_TRANSACTION: + return kctx->data->txn; + case PERF_SAMPLE_WEIGHT: + return kctx->data->weight.full; + case PERF_SAMPLE_PHYS_ADDR: + return kctx->data->phys_addr; + case PERF_SAMPLE_CODE_PAGE_SIZE: + return kctx->data->code_page_size; + case PERF_SAMPLE_DATA_PAGE_SIZE: + return kctx->data->data_page_size; + default: + break; + } + return 0; +} + +/* BPF program to be called from perf event overflow handler */ +SEC("perf_event") +int perf_sample_filter(void *ctx) +{ + struct bpf_perf_event_data_kern *kctx; + struct perf_bpf_filter_entry *entry; + __u64 sample_data; + int i; + + kctx = bpf_cast_to_kern_ctx(ctx); + + for (i = 0; i < MAX_FILTERS; i++) { + int key = i; /* needed for verifier :( */ + + entry = bpf_map_lookup_elem(&filters, &key); + if (entry == NULL) + break; + sample_data = perf_get_sample(kctx, entry); + + switch (entry->op) { + case PBF_OP_EQ: + if (!(sample_data == entry->value)) + goto drop; + break; + case PBF_OP_NEQ: + if (!(sample_data != entry->value)) + goto drop; + break; + case PBF_OP_GT: + if (!(sample_data > entry->value)) + goto drop; + break; + case PBF_OP_GE: + if (!(sample_data >= entry->value)) + goto drop; + break; + case PBF_OP_LT: + if (!(sample_data < entry->value)) + goto drop; + break; + case PBF_OP_LE: + if (!(sample_data <= entry->value)) + goto drop; + break; + case PBF_OP_AND: + if (!(sample_data & entry->value)) + goto drop; + break; + } + } + /* generate sample data */ + return 1; + +drop: + __sync_fetch_and_add(&dropped, 1); + return 0; +} + +char LICENSE[] SEC("license") = "Dual BSD/GPL"; diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index 24cb807ef6ce..6845642485ec 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -151,8 +151,10 @@ struct evsel { */ struct bpf_counter_ops *bpf_counter_ops; - /* for perf-stat -b */ - struct list_head bpf_counter_list; + union { + struct list_head bpf_counter_list; /* for perf-stat -b */ + struct list_head bpf_filters; /* for perf-record --filter */ + }; /* for perf-stat --use-bpf */ int bperf_leader_prog_fd; @@ -160,6 +162,7 @@ struct evsel { union { struct bperf_leader_bpf *leader_skel; struct bperf_follower_bpf *follower_skel; + void *bpf_skel; }; unsigned long open_flags; int precise_ip_original; From patchwork Tue Feb 14 05:04:48 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Namhyung Kim X-Patchwork-Id: 56665 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:eb09:0:0:0:0:0 with SMTP id s9csp2767758wrn; Mon, 13 Feb 2023 21:08:45 -0800 (PST) X-Google-Smtp-Source: AK7set+hNanWAVXue9xBBI30PcvGXltXplvTh6Wm41D3yxkDguFxds+5zBDnv/QKhIXU+FhL2ccI X-Received: by 2002:a17:907:a508:b0:8b1:16b3:303b with SMTP id vr8-20020a170907a50800b008b116b3303bmr1657097ejc.43.1676351325183; 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[2620:137:e000::1:20]) by mx.google.com with ESMTP id e3-20020a170906748300b008b126992f6asi2096286ejl.646.2023.02.13.21.08.21; Mon, 13 Feb 2023 21:08:45 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20210112 header.b=fHezmiFS; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231215AbjBNFFL (ORCPT + 99 others); Tue, 14 Feb 2023 00:05:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35234 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231169AbjBNFFC (ORCPT ); Tue, 14 Feb 2023 00:05:02 -0500 Received: from mail-pl1-x634.google.com (mail-pl1-x634.google.com [IPv6:2607:f8b0:4864:20::634]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2A7155FCC; Mon, 13 Feb 2023 21:05:01 -0800 (PST) Received: by mail-pl1-x634.google.com with SMTP id h4so8030391pll.9; Mon, 13 Feb 2023 21:05:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=S2b01AK+kYNw/IVOT6UQhHqJHrExhR6VVuUopSv4L/o=; b=fHezmiFS3dZ5YIFlugabnaXfHF/ZgMHGk1IigC9SPz+tu4ePFnemEwO0jDKFBrHewT WaMoF6Ir5y7lZdctVKlo1X2PC+eC203B3wvm0U+xC/bbVxRahBwWfINpildV7pz39FZm ot0/fJwRtd+zOKn+PLiZerf6Gfm2fy3h9/lo3Z5WyiA7JmFNWxvGNg7t6V6/W1LAK404 3TtoI/PWvUvgwtX5QEdnuNIDEPEVNiNxMsMi0khUlFZh0CAmy2T7pBmOPqbKAI0I2dNu POS0JNSVyboaTECIrqnIXZxw6WGRbScJmGNqkGwGTpySrDdu2aSHIldrAyXMbvVTmnnm 939w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=S2b01AK+kYNw/IVOT6UQhHqJHrExhR6VVuUopSv4L/o=; b=aU8sO7Eg+A2zUwRcdcPmMA39KQltSucN6ulNjvDuPt2qNp1Mg80Q5EX8bgTag7ZZap vkDd5wVbjkfE6aKdCh51VGP+XMDcUbGjRNyXi57qmdxZlGcR9QQ72gAUEB65EB8z10H5 oZo/v1e1AFtLoQhK9YezCE7zUR98RlexvicEuJiIwI4LXRL2kodhOTigq0630QiqEof3 2zv4DrUYFcif4XA9VIlsgfBWjAm9x5WyiWsINQ3E8L6fStW8n4MoWLSniI78VplWPXLg xjQy18vaIAf4lsMXagoGWnCin0K+YTxttwory/iBxTUg5jA/NRou1o83a8ogY7mbxNQb vJVA== X-Gm-Message-State: AO0yUKV423KXQwZw4Yxf9+RsN4DLonPLiIKGCXIEcZj5ggy/zn5QV/zd tLAprSyhpmHrUeo7fgRbWkQ= X-Received: by 2002:a17:902:d50e:b0:199:33ff:918a with SMTP id b14-20020a170902d50e00b0019933ff918amr1730878plg.21.1676351100502; Mon, 13 Feb 2023 21:05:00 -0800 (PST) Received: from moohyul.svl.corp.google.com ([2620:15c:2d4:203:de3c:c4c2:3f15:764d]) by smtp.gmail.com with ESMTPSA id k18-20020a170902761200b001932a9e4f2csm9045593pll.255.2023.02.13.21.04.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Feb 2023 21:05:00 -0800 (PST) Sender: Namhyung Kim From: Namhyung Kim To: Arnaldo Carvalho de Melo , Jiri Olsa Cc: Peter Zijlstra , Ingo Molnar , Ian Rogers , Adrian Hunter , Andi Kleen , Kan Liang , Song Liu , Stephane Eranian , Ravi Bangoria , Leo Yan , James Clark , Hao Luo , LKML , linux-perf-users@vger.kernel.org, bpf@vger.kernel.org Subject: [PATCH 3/7] perf record: Add BPF event filter support Date: Mon, 13 Feb 2023 21:04:48 -0800 Message-Id: <20230214050452.26390-4-namhyung@kernel.org> X-Mailer: git-send-email 2.39.1.581.gbfd45094c4-goog In-Reply-To: <20230214050452.26390-1-namhyung@kernel.org> References: <20230214050452.26390-1-namhyung@kernel.org> MIME-Version: 1.0 X-Spam-Status: No, score=-1.5 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1757781767051326637?= X-GMAIL-MSGID: =?utf-8?q?1757781767051326637?= Use --filter option to set BPF filter for any events. The filter string must start with 'bpf:' prefix. Then the BPF program will check the sample data and filter according to the expression. For example, the below is the typical perf record for frequency mode. The sample period started from 1 and increased gradually. $ sudo ./perf record -e cycles true $ sudo ./perf script perf-exec 2272336 546683.916875: 1 cycles: ffffffff828499b8 perf_event_exec+0x298 ([kernel.kallsyms]) perf-exec 2272336 546683.916892: 1 cycles: ffffffff828499b8 perf_event_exec+0x298 ([kernel.kallsyms]) perf-exec 2272336 546683.916899: 3 cycles: ffffffff828499b8 perf_event_exec+0x298 ([kernel.kallsyms]) perf-exec 2272336 546683.916905: 17 cycles: ffffffff828499b8 perf_event_exec+0x298 ([kernel.kallsyms]) perf-exec 2272336 546683.916911: 100 cycles: ffffffff828499b8 perf_event_exec+0x298 ([kernel.kallsyms]) perf-exec 2272336 546683.916917: 589 cycles: ffffffff828499b8 perf_event_exec+0x298 ([kernel.kallsyms]) perf-exec 2272336 546683.916924: 3470 cycles: ffffffff828499b8 perf_event_exec+0x298 ([kernel.kallsyms]) perf-exec 2272336 546683.916930: 20465 cycles: ffffffff828499b8 perf_event_exec+0x298 ([kernel.kallsyms]) true 2272336 546683.916940: 119873 cycles: ffffffff8283afdd perf_iterate_ctx+0x2d ([kernel.kallsyms]) true 2272336 546683.917003: 461349 cycles: ffffffff82892517 vma_interval_tree_insert+0x37 ([kernel.kallsyms]) true 2272336 546683.917237: 635778 cycles: ffffffff82a11400 security_mmap_file+0x20 ([kernel.kallsyms]) When you add a BPF filter to get samples having periods greater than 1000, the output would look like below: $ sudo ./perf record -e cycles --filter 'bpf: period > 1000' true $ sudo ./perf script perf-exec 2273949 546850.708501: 5029 cycles: ffffffff826f9e25 finish_wait+0x5 ([kernel.kallsyms]) perf-exec 2273949 546850.708508: 32409 cycles: ffffffff826f9e25 finish_wait+0x5 ([kernel.kallsyms]) perf-exec 2273949 546850.708526: 143369 cycles: ffffffff82b4cdbf xas_start+0x5f ([kernel.kallsyms]) perf-exec 2273949 546850.708600: 372650 cycles: ffffffff8286b8f7 __pagevec_lru_add+0x117 ([kernel.kallsyms]) perf-exec 2273949 546850.708791: 482953 cycles: ffffffff829190de __mod_memcg_lruvec_state+0x4e ([kernel.kallsyms]) true 2273949 546850.709036: 501985 cycles: ffffffff828add7c tlb_gather_mmu+0x4c ([kernel.kallsyms]) true 2273949 546850.709292: 503065 cycles: 7f2446d97c03 _dl_map_object_deps+0x973 (/usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2) Signed-off-by: Namhyung Kim --- tools/perf/Documentation/perf-record.txt | 10 +++++++++- tools/perf/builtin-record.c | 9 +++++++++ tools/perf/util/bpf_counter.c | 3 +-- tools/perf/util/evsel.c | 2 ++ tools/perf/util/parse-events.c | 4 ++++ 5 files changed, 25 insertions(+), 3 deletions(-) diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index ff815c2f67e8..7c6bb3be842a 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -121,7 +121,9 @@ OPTIONS --filter=:: Event filter. This option should follow an event selector (-e) which selects either tracepoint event(s) or a hardware trace PMU - (e.g. Intel PT or CoreSight). + (e.g. Intel PT or CoreSight). If the filter string starts with 'bpf:' + it means a general filter using BPF which can be applied for any kind + of events. - tracepoint filters @@ -174,6 +176,12 @@ OPTIONS within a single mapping. MMAP events (or /proc//maps) can be examined to determine if that is a possibility. + - bpf filters + + BPF filter can access the sample data and make a decision based on the + data. Users need to set the appropriate sample type to use the BPF + filter. + Multiple filters can be separated with space or comma. --exclude-perf:: diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 29dcd454b8e2..c81047a78f3e 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -52,6 +52,7 @@ #include "util/pmu-hybrid.h" #include "util/evlist-hybrid.h" #include "util/off_cpu.h" +#include "util/bpf-filter.h" #include "asm/bug.h" #include "perf.h" #include "cputopo.h" @@ -1368,6 +1369,14 @@ static int record__open(struct record *rec) session->evlist = evlist; perf_session__set_id_hdr_size(session); + + evlist__for_each_entry(evlist, pos) { + if (list_empty(&pos->bpf_filters)) + continue; + rc = perf_bpf_filter__prepare(pos); + if (rc) + break; + } out: return rc; } diff --git a/tools/perf/util/bpf_counter.c b/tools/perf/util/bpf_counter.c index eeee899fcf34..0414385794ee 100644 --- a/tools/perf/util/bpf_counter.c +++ b/tools/perf/util/bpf_counter.c @@ -781,8 +781,7 @@ extern struct bpf_counter_ops bperf_cgrp_ops; static inline bool bpf_counter_skip(struct evsel *evsel) { - return list_empty(&evsel->bpf_counter_list) && - evsel->follower_skel == NULL; + return evsel->bpf_counter_ops == NULL; } int bpf_counter__install_pe(struct evsel *evsel, int cpu_map_idx, int fd) diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 51e8ce6edddc..cae624fde026 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -50,6 +50,7 @@ #include "off_cpu.h" #include "../perf-sys.h" #include "util/parse-branch-options.h" +#include "util/bpf-filter.h" #include #include #include @@ -1494,6 +1495,7 @@ void evsel__exit(struct evsel *evsel) assert(list_empty(&evsel->core.node)); assert(evsel->evlist == NULL); bpf_counter__destroy(evsel); + perf_bpf_filter__destroy(evsel); evsel__free_counts(evsel); perf_evsel__free_fd(&evsel->core); perf_evsel__free_id(&evsel->core); diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 0336ff27c15f..33f654be6fcc 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -27,6 +27,7 @@ #include "perf.h" #include "util/parse-events-hybrid.h" #include "util/pmu-hybrid.h" +#include "util/bpf-filter.h" #include "tracepoint.h" #include "thread_map.h" @@ -2517,6 +2518,9 @@ static int set_filter(struct evsel *evsel, const void *arg) return -1; } + if (!strncmp(str, "bpf:", 4)) + return perf_bpf_filter__parse(&evsel->bpf_filters, str+4); + if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) { if (evsel__append_tp_filter(evsel, str) < 0) { fprintf(stderr, From patchwork Tue Feb 14 05:04:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Namhyung Kim X-Patchwork-Id: 56666 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:eb09:0:0:0:0:0 with SMTP id s9csp2767776wrn; Mon, 13 Feb 2023 21:08:49 -0800 (PST) X-Google-Smtp-Source: AK7set+co44IGGLi7RFUmsQLnv88eYd/XpmkB16KGOHuZPLHXWBwsQACWo8NpqFlMXDy2v9ICFBp X-Received: by 2002:a17:906:a24b:b0:87f:5d0a:c610 with SMTP id bi11-20020a170906a24b00b0087f5d0ac610mr1297742ejb.32.1676351329350; Mon, 13 Feb 2023 21:08:49 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1676351329; cv=none; d=google.com; s=arc-20160816; b=OtT4hquEZ9VYoOG00M9m8NHp9YzSHUMilWRAPUhWOGO0skZxDfcKV68UQNFBz7J32/ +Zi9wgv1N4gY1lVCjuD1TjyFpAUcKsvl2rKfG5yVd5ngso2G8Dtms1/QQvCxgMhiUqZR sPeJouOX3HN+OAYVzQd3+gUNYizpFxcvbxltRb8c879Uegma4PFz68iYymrf6sCOzdKr z7VGs35EuafiI1mjaIw48w8Hc7+Ym+qyEPCXo7T6zIxDGmF4kCvtE6p6NG+MMkRukF+e Tb1IQ0qp9LghGY1Q+Olc5G8ar19FBXLnshlydmjhJvel+gUrwQaE9g32yn5qq3w2Zuzg Q/rg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from:sender :dkim-signature; bh=+lDTeFq3DMLp2HO8sGdZ7LtKYGQh7aSuEDpGdSPDQzs=; b=z4DiLB3J6qJe3A0cIBLCs926pBav2vFnvDZUM56p6pv5pliSR49pdoxzCI0WH+cmTe lUgDpKPdcw16SgOZvycgYyouVCjgBD95ZKpmEjItSvlmRjTAvxE3xWHt64Z9qayxSLfB XFxUPiSIO8In7FM+sfehmDHPqvyD4uiCGCpRfQ60XnZC8GvUkivmgE6tNL7gCGe05/g2 xYiqWn31i0uBoHaGgUBff8I4nutPUxuMxNjTBOXylert22mDWEnv8Fo6EuG7y3f7g4gm w97xqzuqRYipwTj6523cBgZ4V3Mg1gb6I5uC+GzDngUw98bQUDrIVzBaSB3+P366P8gJ 3y0g== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20210112 header.b=NGNDb4oh; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from out1.vger.email (out1.vger.email. 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It'd be nice if it can report how many samples it lost. As LOST_SAMPLES event can carry the similar information, let's use it for bpf filters. To indicate it's from BPF filters, add a new misc flag for that and do not display cpu load warnings. Signed-off-by: Namhyung Kim --- tools/perf/builtin-record.c | 37 ++++++++++++++++++++++-------------- tools/perf/util/bpf-filter.c | 7 +++++++ tools/perf/util/bpf-filter.h | 5 +++++ tools/perf/util/session.c | 3 ++- 4 files changed, 37 insertions(+), 15 deletions(-) diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index c81047a78f3e..3201d1a1ea1f 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -1869,24 +1869,16 @@ record__switch_output(struct record *rec, bool at_exit) return fd; } -static void __record__read_lost_samples(struct record *rec, struct evsel *evsel, +static void __record__save_lost_samples(struct record *rec, struct evsel *evsel, struct perf_record_lost_samples *lost, - int cpu_idx, int thread_idx) + int cpu_idx, int thread_idx, u64 lost_count, + u16 misc_flag) { - struct perf_counts_values count; struct perf_sample_id *sid; struct perf_sample sample = {}; int id_hdr_size; - if (perf_evsel__read(&evsel->core, cpu_idx, thread_idx, &count) < 0) { - pr_err("read LOST count failed\n"); - return; - } - - if (count.lost == 0) - return; - - lost->lost = count.lost; + lost->lost = lost_count; if (evsel->core.ids) { sid = xyarray__entry(evsel->core.sample_id, cpu_idx, thread_idx); sample.id = sid->id; @@ -1895,6 +1887,7 @@ static void __record__read_lost_samples(struct record *rec, struct evsel *evsel, id_hdr_size = perf_event__synthesize_id_sample((void *)(lost + 1), evsel->core.attr.sample_type, &sample); lost->header.size = sizeof(*lost) + id_hdr_size; + lost->header.misc = misc_flag; record__write(rec, NULL, lost, lost->header.size); } @@ -1918,6 +1911,7 @@ static void record__read_lost_samples(struct record *rec) evlist__for_each_entry(session->evlist, evsel) { struct xyarray *xy = evsel->core.sample_id; + u64 lost_count; if (xy == NULL || evsel->core.fd == NULL) continue; @@ -1929,12 +1923,27 @@ static void record__read_lost_samples(struct record *rec) for (int x = 0; x < xyarray__max_x(xy); x++) { for (int y = 0; y < xyarray__max_y(xy); y++) { - __record__read_lost_samples(rec, evsel, lost, x, y); + struct perf_counts_values count; + + if (perf_evsel__read(&evsel->core, x, y, &count) < 0) { + pr_err("read LOST count failed\n"); + goto out; + } + + if (count.lost) { + __record__save_lost_samples(rec, evsel, lost, + x, y, count.lost, 0); + } } } + + lost_count = perf_bpf_filter__lost_count(evsel); + if (lost_count) + __record__save_lost_samples(rec, evsel, lost, 0, 0, lost_count, + PERF_RECORD_MISC_LOST_SAMPLES_BPF); } +out: free(lost); - } static volatile sig_atomic_t workload_exec_errno; diff --git a/tools/perf/util/bpf-filter.c b/tools/perf/util/bpf-filter.c index f47420cf81c9..11fb391c92e9 100644 --- a/tools/perf/util/bpf-filter.c +++ b/tools/perf/util/bpf-filter.c @@ -76,6 +76,13 @@ int perf_bpf_filter__destroy(struct evsel *evsel) return 0; } +u64 perf_bpf_filter__lost_count(struct evsel *evsel) +{ + struct sample_filter_bpf *skel = evsel->bpf_skel; + + return skel ? skel->bss->dropped : 0; +} + struct perf_bpf_filter_expr *perf_bpf_filter_expr__new(unsigned long sample_flags, enum perf_bpf_filter_op op, unsigned long val) diff --git a/tools/perf/util/bpf-filter.h b/tools/perf/util/bpf-filter.h index 6077930073f9..36b44c8188ab 100644 --- a/tools/perf/util/bpf-filter.h +++ b/tools/perf/util/bpf-filter.h @@ -22,6 +22,7 @@ struct perf_bpf_filter_expr *perf_bpf_filter_expr__new(unsigned long sample_flag int perf_bpf_filter__parse(struct list_head *expr_head, const char *str); int perf_bpf_filter__prepare(struct evsel *evsel); int perf_bpf_filter__destroy(struct evsel *evsel); +u64 perf_bpf_filter__lost_count(struct evsel *evsel); #else /* !HAVE_BPF_SKEL */ @@ -38,5 +39,9 @@ static inline int perf_bpf_filter__destroy(struct evsel *evsel) { return -ENOSYS; } +static inline u64 perf_bpf_filter__lost_count(struct evsel *evsel) +{ + return 0; +} #endif /* HAVE_BPF_SKEL*/ #endif /* PERF_UTIL_BPF_FILTER_H */ \ No newline at end of file diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index 749d5b5c135b..7d8d057d1772 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -1582,7 +1582,8 @@ static int machines__deliver_event(struct machines *machines, evlist->stats.total_lost += event->lost.lost; return tool->lost(tool, event, sample, machine); case PERF_RECORD_LOST_SAMPLES: - if (tool->lost_samples == perf_event__process_lost_samples) + if (tool->lost_samples == perf_event__process_lost_samples && + !(event->header.misc & PERF_RECORD_MISC_LOST_SAMPLES_BPF)) evlist->stats.total_lost_samples += event->lost_samples.lost; return tool->lost_samples(tool, event, sample, machine); case PERF_RECORD_READ: From patchwork Tue Feb 14 05:04:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Namhyung Kim X-Patchwork-Id: 56667 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:eb09:0:0:0:0:0 with SMTP id s9csp2767861wrn; Mon, 13 Feb 2023 21:09:01 -0800 (PST) X-Google-Smtp-Source: AK7set9tqO6Z7KUpQ3g8Tn73njXYPeuGfQrK46ZtGEaZmaqu3XIUrfuhepMXPXxq7IAqZMKdMiPI X-Received: by 2002:a17:907:20ee:b0:870:827f:f78e with SMTP id rh14-20020a17090720ee00b00870827ff78emr1570969ejb.48.1676351341709; Mon, 13 Feb 2023 21:09:01 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1676351341; cv=none; d=google.com; s=arc-20160816; b=jXv/wJYu3mKzxvhDxK/uZceNI+aybMK9NttHwdVvwSeosxMgj3PoiN1KwH8RgUu/i0 L0JQxQEaooVSoum+n27owcmnXsDFMRyozWRBMMQXYQEHioOKk1P4a1C0nubyL9tt7lrx WJZ6w7e9Crd3kG+KIKkTVHv1oSodshy1Z34CoU3GZvN61I48ZsK3Gl2ZV533ZY0t2nLP DVrYs6v+AFUzZwPBJfsmtUU1mey6qnh07Cin/EnMo7cc3KVIw2uKiFhDwqlynIJvPDQA cXJ6L85P4YdhEiB7L0oUqMCZu0IJH6CA0S9dzGoYVdy4zpoxscFPgonnFKX6Toa0dHfO fdVg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from:sender :dkim-signature; bh=9saedHbGi5lnxDop2A9W+edZkWtcZzgvFBH7wuOD4MI=; b=otYdyis5lAPBR5r8STwcXch7p3R/RYqi507IdxyP2sBwzVOVUBHWfmA9tc8OPH+kxD I5U5ttf2ZwryYB7hxve9t8v4JPcJM4eIbhiOfdyBOmVUFprwjhB245n/NmOmv7r9ZF1G 25/YvhTBeIURyBd+2pIeyprv3ozviUF8Tgm7E6q/yqEMsPCEE7GdbB2vIAqbk7uKckeJ thaNfKUUBkNUcbclkaH+CNHgr7tY5n4XbsHjzCQzXW8c57MKo8ehtXg9dt8hCNON1HpU hz6j0AL8D30HsGHEuhNpXNAz/v4pV+TuYDIdNWotlRFj+Ta9EVZllgOQ0xOG4oagOucs AlYg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20210112 header.b=E8dLCohN; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from out1.vger.email (out1.vger.email. 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So it needs to differenciate tid and pid using the 'part' field in the perf bpf filter entry struct. Signed-off-by: Namhyung Kim --- tools/perf/util/bpf-filter.c | 4 +++- tools/perf/util/bpf-filter.h | 3 ++- tools/perf/util/bpf-filter.l | 11 ++++++++++- tools/perf/util/bpf-filter.y | 7 +++++-- tools/perf/util/bpf_skel/sample-filter.h | 3 ++- tools/perf/util/bpf_skel/sample_filter.bpf.c | 5 ++++- 6 files changed, 26 insertions(+), 7 deletions(-) diff --git a/tools/perf/util/bpf-filter.c b/tools/perf/util/bpf-filter.c index 11fb391c92e9..2e02dc965dd9 100644 --- a/tools/perf/util/bpf-filter.c +++ b/tools/perf/util/bpf-filter.c @@ -43,6 +43,7 @@ int perf_bpf_filter__prepare(struct evsel *evsel) list_for_each_entry(expr, &evsel->bpf_filters, list) { struct perf_bpf_filter_entry entry = { .op = expr->op, + .part = expr->part, .flags = expr->sample_flags, .value = expr->val, }; @@ -83,7 +84,7 @@ u64 perf_bpf_filter__lost_count(struct evsel *evsel) return skel ? skel->bss->dropped : 0; } -struct perf_bpf_filter_expr *perf_bpf_filter_expr__new(unsigned long sample_flags, +struct perf_bpf_filter_expr *perf_bpf_filter_expr__new(unsigned long sample_flags, int part, enum perf_bpf_filter_op op, unsigned long val) { @@ -92,6 +93,7 @@ struct perf_bpf_filter_expr *perf_bpf_filter_expr__new(unsigned long sample_flag expr = malloc(sizeof(*expr)); if (expr != NULL) { expr->sample_flags = sample_flags; + expr->part = part; expr->op = op; expr->val = val; } diff --git a/tools/perf/util/bpf-filter.h b/tools/perf/util/bpf-filter.h index 36b44c8188ab..4fb33d296d9c 100644 --- a/tools/perf/util/bpf-filter.h +++ b/tools/perf/util/bpf-filter.h @@ -9,6 +9,7 @@ struct perf_bpf_filter_expr { struct list_head list; enum perf_bpf_filter_op op; + int part; unsigned long sample_flags; unsigned long val; }; @@ -16,7 +17,7 @@ struct perf_bpf_filter_expr { struct evsel; #ifdef HAVE_BPF_SKEL -struct perf_bpf_filter_expr *perf_bpf_filter_expr__new(unsigned long sample_flags, +struct perf_bpf_filter_expr *perf_bpf_filter_expr__new(unsigned long sample_flags, int part, enum perf_bpf_filter_op op, unsigned long val); int perf_bpf_filter__parse(struct list_head *expr_head, const char *str); diff --git a/tools/perf/util/bpf-filter.l b/tools/perf/util/bpf-filter.l index 34c6a9fd4fa4..5117c76c7c7a 100644 --- a/tools/perf/util/bpf-filter.l +++ b/tools/perf/util/bpf-filter.l @@ -10,7 +10,15 @@ static int sample(unsigned long sample_flag) { - perf_bpf_filter_lval.sample = sample_flag; + perf_bpf_filter_lval.sample.type = sample_flag; + perf_bpf_filter_lval.sample.part = 0; + return BFT_SAMPLE; +} + +static int sample_part(unsigned long sample_flag, int part) +{ + perf_bpf_filter_lval.sample.type = sample_flag; + perf_bpf_filter_lval.sample.part = part; return BFT_SAMPLE; } @@ -46,6 +54,7 @@ num_hex 0[Xx][0-9a-fA-F]+ ip { return sample(PERF_SAMPLE_IP); } id { return sample(PERF_SAMPLE_ID); } tid { return sample(PERF_SAMPLE_TID); } +pid { return sample_part(PERF_SAMPLE_TID, 1); } cpu { return sample(PERF_SAMPLE_CPU); } time { return sample(PERF_SAMPLE_TIME); } addr { return sample(PERF_SAMPLE_ADDR); } diff --git a/tools/perf/util/bpf-filter.y b/tools/perf/util/bpf-filter.y index 0bf36ec30abf..8f307d5ffc54 100644 --- a/tools/perf/util/bpf-filter.y +++ b/tools/perf/util/bpf-filter.y @@ -19,7 +19,10 @@ static void perf_bpf_filter_error(struct list_head *expr __maybe_unused, %union { unsigned long num; - unsigned long sample; + struct { + unsigned long type; + int part; + } sample; enum perf_bpf_filter_op op; struct perf_bpf_filter_expr *expr; } @@ -46,7 +49,7 @@ filter_term filter_term: BFT_SAMPLE BFT_OP BFT_NUM { - $$ = perf_bpf_filter_expr__new($1, $2, $3); + $$ = perf_bpf_filter_expr__new($1.type, $1.part, $2, $3); } %% diff --git a/tools/perf/util/bpf_skel/sample-filter.h b/tools/perf/util/bpf_skel/sample-filter.h index 862060bfda14..6b9fd554ad7b 100644 --- a/tools/perf/util/bpf_skel/sample-filter.h +++ b/tools/perf/util/bpf_skel/sample-filter.h @@ -17,7 +17,8 @@ enum perf_bpf_filter_op { /* BPF map entry for filtering */ struct perf_bpf_filter_entry { enum perf_bpf_filter_op op; - __u64 flags; + __u32 part; /* sub-sample type info when it has multiple values */ + __u64 flags; /* perf sample type flags */ __u64 value; }; diff --git a/tools/perf/util/bpf_skel/sample_filter.bpf.c b/tools/perf/util/bpf_skel/sample_filter.bpf.c index 1aa6a4cacd51..e9a0633d638d 100644 --- a/tools/perf/util/bpf_skel/sample_filter.bpf.c +++ b/tools/perf/util/bpf_skel/sample_filter.bpf.c @@ -32,7 +32,10 @@ static inline __u64 perf_get_sample(struct bpf_perf_event_data_kern *kctx, case PERF_SAMPLE_ID: return kctx->data->id; 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Add weight{1,2,3} term to select them separately. Also add their aliases like 'ins_lat', 'p_stage_cyc' and 'retire_lat'. Signed-off-by: Namhyung Kim --- tools/perf/util/bpf-filter.l | 6 ++++++ tools/perf/util/bpf_skel/sample_filter.bpf.c | 8 ++++++++ 2 files changed, 14 insertions(+) diff --git a/tools/perf/util/bpf-filter.l b/tools/perf/util/bpf-filter.l index 5117c76c7c7a..bdc06babb028 100644 --- a/tools/perf/util/bpf-filter.l +++ b/tools/perf/util/bpf-filter.l @@ -61,6 +61,12 @@ addr { return sample(PERF_SAMPLE_ADDR); } period { return sample(PERF_SAMPLE_PERIOD); } txn { return sample(PERF_SAMPLE_TRANSACTION); } weight { return sample(PERF_SAMPLE_WEIGHT); } +weight1 { return sample_part(PERF_SAMPLE_WEIGHT_STRUCT, 1); } +weight2 { return sample_part(PERF_SAMPLE_WEIGHT_STRUCT, 2); } +weight3 { return sample_part(PERF_SAMPLE_WEIGHT_STRUCT, 3); } +ins_lat { return sample_part(PERF_SAMPLE_WEIGHT_STRUCT, 2); } /* alias for weight2 */ +p_stage_cyc { return sample_part(PERF_SAMPLE_WEIGHT_STRUCT, 3); } /* alias for weight3 */ +retire_lat { return sample_part(PERF_SAMPLE_WEIGHT_STRUCT, 3); } /* alias for weight3 */ phys_addr { return sample(PERF_SAMPLE_PHYS_ADDR); } code_pgsz { return sample(PERF_SAMPLE_CODE_PAGE_SIZE); } data_pgsz { return sample(PERF_SAMPLE_DATA_PAGE_SIZE); } diff --git a/tools/perf/util/bpf_skel/sample_filter.bpf.c b/tools/perf/util/bpf_skel/sample_filter.bpf.c index e9a0633d638d..5b239f194fa9 100644 --- a/tools/perf/util/bpf_skel/sample_filter.bpf.c +++ b/tools/perf/util/bpf_skel/sample_filter.bpf.c @@ -46,6 +46,14 @@ static inline __u64 perf_get_sample(struct bpf_perf_event_data_kern *kctx, return kctx->data->period; case PERF_SAMPLE_TRANSACTION: return kctx->data->txn; + case PERF_SAMPLE_WEIGHT_STRUCT: + if (entry->part == 1) + return kctx->data->weight.var1_dw; + if (entry->part == 2) + return kctx->data->weight.var2_w; + if (entry->part == 3) + return kctx->data->weight.var3_w; + /* fall through */ case PERF_SAMPLE_WEIGHT: return kctx->data->weight.full; case PERF_SAMPLE_PHYS_ADDR: From patchwork Tue Feb 14 05:04:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Namhyung Kim X-Patchwork-Id: 56669 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:eb09:0:0:0:0:0 with SMTP id s9csp2767950wrn; Mon, 13 Feb 2023 21:09:13 -0800 (PST) X-Google-Smtp-Source: AK7set9EdhEW5wmJDkPVOzyzXM2Jh1p4FLxud5l8q+XpwjS3034phBXPI0KUD+dYUqGBDiae9er5 X-Received: by 2002:a50:9f43:0:b0:4ac:b59c:8f41 with SMTP id b61-20020a509f43000000b004acb59c8f41mr1448174edf.30.1676351353010; Mon, 13 Feb 2023 21:09:13 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1676351352; cv=none; d=google.com; s=arc-20160816; b=GOlFEt64WHTPyA5TxtUqYDg3NDdKAIt5YXASoG7tlh3JLqBIJ9D8c1U+CdDmsxMCHd 1lr/vcCLtLfZuxlsd6aXTo0JOxEhvABdqfC+7Z1ggZtng8t634vRoXv9B5judYCuVnL9 1mO67h48KKXV5bBXfHO06Hk6pMjldpV8muGxyKLyuqEeEB85T9+Kub+3qUpM6jyf/NMp jRzDEhY2WX294RfSFptL80w/NgJ8XTNhmGSd+hX+nl9IvkF9LWBYztd2B6mmYIguKHzH M63ofRs65yNG0MGPbSLMGPi9x3inMe0nh3s4p7gQWcZ+fV2pegzOVAF9H+8lVYOzbT6c Pb9Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from:sender :dkim-signature; bh=VOPNCVA20E0uVUS+CW/b7qI/sayGHYZXibfTiD56j0M=; b=OOnF3ap1tbtMBXdd1zUv5YTz5F4a/zGO2GKX20SjnOXmL+If30Fgqf99/kmf0Yjkgf r8vmKVuJMdQVtt4Gf+utGFlLzANvcdDC7C3PoqhzoxYRXZsGfUpJczom+Qr69hhae6Ry UEN3UetSV6SV2lStQktVDqJaj1p7c7K5UQAQZEZsUEAne2tBqMpHVWlscEGD8Kh6U+kZ JSL62mUAeuSkKXEeJTdtRhf6UIL95/90wVWtdZVJbaOx66CtgSX0Px6jWLrt6cspgEyR 6wUR4/KzVnz+5UW+Llh6k60Gfsobn9KUuEXUx9+G8YJh9FKge5A9TE0i4aF7C3Y3MK0G WW1g== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20210112 header.b=f5NRaWWE; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from out1.vger.email (out1.vger.email. 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Add each term separately so that users can combine them for their purpose. I didn't add prefix for the constants for simplicity as they are mostly distinguishable but I had to use l1_miss and l2_hit for mem_dtlb since mem_lvl has different values for the same names. Note that I decided mem_lvl to be used as an alias of mem_lvlnum as it's deprecated now. According to the comment in the UAPI header, users should use the mix of mem_lvlnum, mem_remote and mem_snoop. Also the SNOOPX bits are concatenated to mem_snoop for simplicity. The following terms are used for data_src and the corresponding perf sample data fields: * mem_op : { load, store, pfetch, exec } * mem_lvl: { l1, l2, l3, l4, cxl, io, any_cache, lfb, ram, pmem } * mem_snoop: { none, hit, miss, hitm, fwd, peer } * mem_remote: { remote } * mem_lock: { locked } * mem_dtlb { l1_hit, l1_miss, l2_hit, l2_miss, any_hit, any_miss, walk, fault } * mem_blk { by_data, by_addr } * mem_hops { hops0, hops1, hops2, hops3 } We can now use a filter expression like below: 'bpf: mem_op == load, mem_lvl <= l2, mem_dtlb == l1_hit' 'bpf: mem_dtlb == l2_miss, mem_hops > hops1' 'bpf: mem_lvl == ram, mem_remote == 1' Note that 'na' is shared among the terms as it has the same value except for mem_lvl. I don't have a good idea to handle that for now. Signed-off-by: Namhyung Kim --- tools/perf/util/bpf-filter.l | 61 ++++++++++++++++++++ tools/perf/util/bpf_skel/sample_filter.bpf.c | 23 ++++++++ 2 files changed, 84 insertions(+) diff --git a/tools/perf/util/bpf-filter.l b/tools/perf/util/bpf-filter.l index bdc06babb028..3af9331302cf 100644 --- a/tools/perf/util/bpf-filter.l +++ b/tools/perf/util/bpf-filter.l @@ -41,6 +41,12 @@ static int value(int base) return BFT_NUM; } +static int constant(int val) +{ + perf_bpf_filter_lval.num = val; + return BFT_NUM; +} + %} num_dec [0-9]+ @@ -70,6 +76,15 @@ retire_lat { return sample_part(PERF_SAMPLE_WEIGHT_STRUCT, 3); } /* alias for we phys_addr { return sample(PERF_SAMPLE_PHYS_ADDR); } code_pgsz { return sample(PERF_SAMPLE_CODE_PAGE_SIZE); } data_pgsz { return sample(PERF_SAMPLE_DATA_PAGE_SIZE); } +mem_op { return sample_part(PERF_SAMPLE_DATA_SRC, 1); } +mem_lvlnum { return sample_part(PERF_SAMPLE_DATA_SRC, 2); } +mem_lvl { return sample_part(PERF_SAMPLE_DATA_SRC, 2); } /* alias for mem_lvlnum */ +mem_snoop { return sample_part(PERF_SAMPLE_DATA_SRC, 3); } /* include snoopx */ +mem_remote { return sample_part(PERF_SAMPLE_DATA_SRC, 4); } +mem_lock { return sample_part(PERF_SAMPLE_DATA_SRC, 5); } +mem_dtlb { return sample_part(PERF_SAMPLE_DATA_SRC, 6); } +mem_blk { return sample_part(PERF_SAMPLE_DATA_SRC, 7); } +mem_hops { return sample_part(PERF_SAMPLE_DATA_SRC, 8); } "==" { return operator(PBF_OP_EQ); } "!=" { return operator(PBF_OP_NEQ); } @@ -79,6 +94,52 @@ data_pgsz { return sample(PERF_SAMPLE_DATA_PAGE_SIZE); } "<=" { return operator(PBF_OP_LE); } "&" { return operator(PBF_OP_AND); } +na { return constant(PERF_MEM_OP_NA); } +load { return constant(PERF_MEM_OP_LOAD); } +store { return constant(PERF_MEM_OP_STORE); } +pfetch { return constant(PERF_MEM_OP_PFETCH); } +exec { return constant(PERF_MEM_OP_EXEC); } + +l1 { return constant(PERF_MEM_LVLNUM_L1); } +l2 { return constant(PERF_MEM_LVLNUM_L2); } +l3 { return constant(PERF_MEM_LVLNUM_L3); } +l4 { return constant(PERF_MEM_LVLNUM_L4); } +cxl { return constant(PERF_MEM_LVLNUM_CXL); } +io { return constant(PERF_MEM_LVLNUM_IO); } +any_cache { return constant(PERF_MEM_LVLNUM_ANY_CACHE); } +lfb { return constant(PERF_MEM_LVLNUM_LFB); } +ram { return constant(PERF_MEM_LVLNUM_RAM); } +pmem { return constant(PERF_MEM_LVLNUM_PMEM); } + +none { return constant(PERF_MEM_SNOOP_NONE); } +hit { return constant(PERF_MEM_SNOOP_HIT); } +miss { return constant(PERF_MEM_SNOOP_MISS); } +hitm { return constant(PERF_MEM_SNOOP_HITM); } +fwd { return constant(PERF_MEM_SNOOPX_FWD); } +peer { return constant(PERF_MEM_SNOOPX_PEER); } + +remote { return constant(PERF_MEM_REMOTE_REMOTE); } + +locked { return constant(PERF_MEM_LOCK_LOCKED); } + +l1_hit { return constant(PERF_MEM_TLB_L1 | PERF_MEM_TLB_HIT); } +l1_miss { return constant(PERF_MEM_TLB_L1 | PERF_MEM_TLB_MISS); } +l2_hit { return constant(PERF_MEM_TLB_L2 | PERF_MEM_TLB_HIT); } +l2_miss { return constant(PERF_MEM_TLB_L2 | PERF_MEM_TLB_MISS); } +any_hit { return constant(PERF_MEM_TLB_HIT); } +any_miss { return constant(PERF_MEM_TLB_MISS); } +walk { return constant(PERF_MEM_TLB_WK); } +os { return constant(PERF_MEM_TLB_OS); } +fault { return constant(PERF_MEM_TLB_OS); } /* alias for os */ + +by_data { return constant(PERF_MEM_BLK_DATA); } +by_addr { return constant(PERF_MEM_BLK_ADDR); } + +hops0 { return constant(PERF_MEM_HOPS_0); } +hops1 { return constant(PERF_MEM_HOPS_1); } +hops2 { return constant(PERF_MEM_HOPS_2); } +hops3 { return constant(PERF_MEM_HOPS_3); } + "," { return ','; } . { } diff --git a/tools/perf/util/bpf_skel/sample_filter.bpf.c b/tools/perf/util/bpf_skel/sample_filter.bpf.c index 5b239f194fa9..0148b47de7b9 100644 --- a/tools/perf/util/bpf_skel/sample_filter.bpf.c +++ b/tools/perf/util/bpf_skel/sample_filter.bpf.c @@ -62,6 +62,29 @@ static inline __u64 perf_get_sample(struct bpf_perf_event_data_kern *kctx, return kctx->data->code_page_size; case PERF_SAMPLE_DATA_PAGE_SIZE: return kctx->data->data_page_size; + case PERF_SAMPLE_DATA_SRC: + if (entry->part == 1) + return kctx->data->data_src.mem_op; + if (entry->part == 2) + return kctx->data->data_src.mem_lvl_num; + if (entry->part == 3) { + __u32 snoop = kctx->data->data_src.mem_snoop; + __u32 snoopx = kctx->data->data_src.mem_snoopx; + + return (snoopx << 5) | snoop; + } + if (entry->part == 4) + return kctx->data->data_src.mem_remote; + if (entry->part == 5) + return kctx->data->data_src.mem_lock; + if (entry->part == 6) + return kctx->data->data_src.mem_dtlb; + if (entry->part == 7) + return kctx->data->data_src.mem_blk; + if (entry->part == 8) + return kctx->data->data_src.mem_hops; + /* return the whole word */ + return kctx->data->data_src.val; default: break; }