From patchwork Thu Apr 27 23:48:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Namhyung Kim X-Patchwork-Id: 88418 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:b0ea:0:b0:3b6:4342:cba0 with SMTP id b10csp610105vqo; Thu, 27 Apr 2023 17:23:11 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ4lZ68cbOsN77LT9PyoacU3t27eyvJjQs+a93izXrnPMSeUbMlevbr9NNLnP5SpbXCLg17V X-Received: by 2002:a17:90a:3b41:b0:24b:3476:9867 with SMTP id t1-20020a17090a3b4100b0024b34769867mr3234609pjf.48.1682641391025; Thu, 27 Apr 2023 17:23:11 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1682641391; cv=none; d=google.com; s=arc-20160816; b=tHIqUWCDAI6i0gNZlhdNo9Yulml8/KXEvW9pou1CRyiG68xZPZ+nDBTxW5fAzoaY7I 509TPpxM+HTUASktG7NesDcbrwe8Gfr/NtlgXtnS44ZnEAXD/wRz5rHdjH1LDvixjh7c X1nkdVekvWU3leSfanHtp74ut1NBsdYIBiOplkPdJJ0bXvyB+E8csPPPoVnSZdVO5yKO qaILIJbiM9gpO4/ErIfkCqBibAf9FKqZbRFYQ4msf35w461zZ8yuRlO5dU+1hoeVI2gJ wKGnQLLl9k+q7X5tLM4uEcJPj0QRN2ht+y1WbZYQ15VmNkGCWp/uti60VIi+q2U0vTIu IvQg== 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 :message-id:date:subject:cc:to:from:sender:dkim-signature; bh=Hvu69ObOjDcoWXd9/X9TroW2MzYAQKs3/cK182eTWso=; b=PM9qpeAoiLTTU3STEIYk30eIP+vrABBDW1zyfUDO3WPosN+H4u6SeqsE5+40F4yB1x 8hd4AdtlWsTgooprnNI1uTELKa4ZTVHVFfKpfj/EyBb/dWaYqPyp9B7bFfE8EqTBYXCh jd0UDydDZKVeoHK27BSLX2bhrcI8mjHY9/X0krWLHMZ75vEbNYuL9zKnOlmN5bxsrXZU lK12ihieN4lLaZ6GEXHvCCCRX38aV+3VnPzmhwy4BQfj/iwvw5A394F4hbUqMd85h7fA sSjo1H0GoP2WMqj4LuQI7CSphrqpRH7V/3l5mJKF1tNYZfPsBfxktGHmc0TFf1qUvWTF mDyg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20221208 header.b=g3HuvbQZ; 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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Otherwise it'd fail like below: $ sudo perf lock contention -ab libbpf: prog 'collect_lock_syms': BPF program load failed: Invalid argument libbpf: prog 'collect_lock_syms': -- BEGIN PROG LOAD LOG -- reg type unsupported for arg#0 function collect_lock_syms#380 ; int BPF_PROG(collect_lock_syms) 0: (b7) r6 = 0 ; R6_w=0 1: (b7) r7 = 0 ; R7_w=0 2: (b7) r9 = 1 ; R9_w=1 3: failed to resolve CO-RE relocation [381] struct rq__new.__lock (0:0 @ offset 0) Fixes: 0c1228486bef ("perf lock contention: Support pre-5.14 kernels") Signed-off-by: Namhyung Kim Acked-by: Ian Rogers --- tools/perf/util/bpf_skel/lock_contention.bpf.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/tools/perf/util/bpf_skel/lock_contention.bpf.c b/tools/perf/util/bpf_skel/lock_contention.bpf.c index 8911e2a077d8..30c193078bdb 100644 --- a/tools/perf/util/bpf_skel/lock_contention.bpf.c +++ b/tools/perf/util/bpf_skel/lock_contention.bpf.c @@ -418,11 +418,11 @@ int contention_end(u64 *ctx) extern struct rq runqueues __ksym; -struct rq__old { +struct rq___old { raw_spinlock_t lock; } __attribute__((preserve_access_index)); -struct rq__new { +struct rq___new { raw_spinlock_t __lock; } __attribute__((preserve_access_index)); @@ -434,8 +434,8 @@ int BPF_PROG(collect_lock_syms) for (int i = 0; i < MAX_CPUS; i++) { struct rq *rq = bpf_per_cpu_ptr(&runqueues, i); - struct rq__new *rq_new = (void *)rq; - struct rq__old *rq_old = (void *)rq; + struct rq___new *rq_new = (void *)rq; + struct rq___old *rq_old = (void *)rq; if (rq == NULL) break; From patchwork Thu Apr 27 23:48:33 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Namhyung Kim X-Patchwork-Id: 88415 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:b0ea:0:b0:3b6:4342:cba0 with SMTP id b10csp609573vqo; Thu, 27 Apr 2023 17:21:49 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ4Xjg6wr5wpImLIicoWU5MTFc+J8jiyWQQhxF/QHZ/1ON/vT60FJEPFNm4MPQL/8ZLehZ6N X-Received: by 2002:a05:6a00:1950:b0:63d:2911:3683 with SMTP id s16-20020a056a00195000b0063d29113683mr5551507pfk.17.1682641309308; Thu, 27 Apr 2023 17:21:49 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1682641309; cv=none; d=google.com; s=arc-20160816; b=KTFp2bpJ752hzHwQiGiWiZlHt937f23rx6hsJyXEgWS7kX+ordUWCEXdeDU0uc5b5z I7NvSV5lg2sQrJ9cJxX2rwg0egzADSBkxUwJwmSuUZ29xqJgnwY9eQzPLG707eeA4rw+ tMEbn0Net5fCMM8bopT2Q2bMnHZlqzsSRmsyeKCMUbbtYgqtAJxIHGpWwjXu5DhjExvu TIc6BSQ+b+my1hQm+RpXQSsg6B1bJ7+qYiA8Knx3JTH+zPUDJKGm9kXKLon+6a+g3UyY ILqc6nVJ5fWrzRilKnH1h3IacmrUxbOQPIfyYgN5iShY4/i420hpulaMoaG4TovY+TGu cwyA== 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=ZNOWzjzDN8/IL6kFuuC3MOAdiIjEwK+a4rVMlscXpEU=; b=pLkvz4yuALjNYByiXbAEjhPMWdg8wWhiH8RRYu9IrpkHL4wHay8dRDtd/Gm4daE4ge PdWruOO9alraB1be9QP9EGSoHOioCSsp00Dua3yWATAPRpmyBTCcptzZhEgGR4I50uUx hurnCrK8bWaChpPI+jYYl9obVcwQHSfbKC8Nxsf5l28zF7re2aYQSf8jhR+fI/Jhqy9O 2F5G729Ce2mmWluUlVMZlOOBWLC6su7Dv4j/ZheFVmSo+0SYZAfoYLpQ3usp9nsPZ5pl Y1jzPyp5hX2p7JsLx1yJ4SAdDavMs6e6Eg7OTrzxu++urSUufOm4NkJPVuUqrmRWlJPy WO7g== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20221208 header.b=Dy7KxEsS; 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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Use offsetof() to make it explicit so that the compiler would generate the correct code. Fixes: 0c1228486bef ("perf lock contention: Support pre-5.14 kernels") Co-developed-by: Andrii Nakryiko Signed-off-by: Namhyung Kim Acked-by: Ian Rogers --- tools/perf/util/bpf_skel/lock_contention.bpf.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/tools/perf/util/bpf_skel/lock_contention.bpf.c b/tools/perf/util/bpf_skel/lock_contention.bpf.c index 30c193078bdb..8d3cfbb3cc65 100644 --- a/tools/perf/util/bpf_skel/lock_contention.bpf.c +++ b/tools/perf/util/bpf_skel/lock_contention.bpf.c @@ -429,21 +429,21 @@ struct rq___new { SEC("raw_tp/bpf_test_finish") int BPF_PROG(collect_lock_syms) { - __u64 lock_addr; + __u64 lock_addr, lock_off; __u32 lock_flag; + if (bpf_core_field_exists(struct rq___new, __lock)) + lock_off = offsetof(struct rq___new, __lock); + else + lock_off = offsetof(struct rq___old, lock); + for (int i = 0; i < MAX_CPUS; i++) { struct rq *rq = bpf_per_cpu_ptr(&runqueues, i); - struct rq___new *rq_new = (void *)rq; - struct rq___old *rq_old = (void *)rq; if (rq == NULL) break; - if (bpf_core_field_exists(rq_new->__lock)) - lock_addr = (__u64)&rq_new->__lock; - else - lock_addr = (__u64)&rq_old->lock; + lock_addr = (__u64)(void *)rq + lock_off; lock_flag = LOCK_CLASS_RQLOCK; bpf_map_update_elem(&lock_syms, &lock_addr, &lock_flag, BPF_ANY); }