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bh=Vp/4na1V53+tI1gIgDhwPwLFjOKMhZJaYVMauAvjYOs=; b=ULo7yfc5CnMvo7SflT4Es/1fovix3kpUn3tW3YLoWil8NvKwW1VxJre9 nvOWG+kmRaJOClvHi+8EV2pVB/Lupym6R69mpqLJNXDa2r6LF92BOtpvt QS/zS5Z55W6NZAhiywG/hJOs76LsuNUxR/WjScckvf969hos7ZzZ3ndlk PvyRm22p3z2XOqofvBzSCWuPC2EhDC4uUu5L5M2ZHH86oEqlJGKVTUlKM shUg0sn6Jl19Qd5Hywih76EAyKBNwMgTSYgi5b05DfKFcbmiNcZ0XPoAI bbsAOkty2KeMWifMLvsjnOE1VWrAYLMnhoN4T9iWlJcsxZu9KczI/cIVu w==; X-IronPort-AV: E=McAfee;i="6600,9927,10975"; a="395161867" X-IronPort-AV: E=Sophos;i="6.05,247,1701158400"; d="scan'208";a="395161867" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Feb 2024 05:05:14 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.05,247,1701158400"; d="scan'208";a="999419" Received: from ahunter6-mobl1.ger.corp.intel.com (HELO ahunter-VirtualBox.home\044ger.corp.intel.com) ([10.252.42.101]) by fmviesa009-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Feb 2024 05:05:12 -0800 From: Adrian Hunter To: Arnaldo Carvalho de Melo Cc: Jiri Olsa , Namhyung Kim , Ian Rogers , Like Xu , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org Subject: [PATCH V2 1/2] perf tools: Make it possible to see perf's kernel and module memory mappings Date: Tue, 6 Feb 2024 15:04:57 +0200 Message-Id: <20240206130458.8867-2-adrian.hunter@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240206130458.8867-1-adrian.hunter@intel.com> References: <20240206130458.8867-1-adrian.hunter@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki, Business Identity Code: 0357606 - 4, Domiciled in Helsinki X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1790154898590360064 X-GMAIL-MSGID: 1790154898590360064 Dump kmaps if using 'perf --debug kmaps' or verbose > 2 (e.g. -vvv) for tools 'perf script' and 'perf report' if there is no browser. Example: $ perf --debug kmaps script 2>&1 >/dev/null | grep kvm.intel build id event received for /lib/modules/6.7.2-local/kernel/arch/x86/kvm/kvm-intel.ko: 0691d75e10e72ebbbd45a44c59f6d00a5604badf [20] Map: 0-3a3 4f5d8 [kvm_intel].modinfo Map: 0-5240 5f280 [kvm_intel]__versions Map: 0-30 64 [kvm_intel].note.Linux Map: 0-14 644c0 [kvm_intel].orc_header Map: 0-5297 43680 [kvm_intel].rodata Map: 0-5bee 3b837 [kvm_intel].text.unlikely Map: 0-7e0 41430 [kvm_intel].noinstr.text Map: 0-2080 713c0 [kvm_intel].bss Map: 0-26 705c8 [kvm_intel].data..read_mostly Map: 0-5888 6a4c0 [kvm_intel].data Map: 0-22 70220 [kvm_intel].data.once Map: 0-40 705f0 [kvm_intel].data..percpu Map: 0-1685 41d20 [kvm_intel].init.text Map: 0-4b8 6fd60 [kvm_intel].init.data Map: 0-380 70248 [kvm_intel]__dyndbg Map: 0-8 70218 [kvm_intel].exit.data Map: 0-438 4f980 [kvm_intel]__param Map: 0-5f5 4ca0f [kvm_intel].rodata.str1.1 Map: 0-3657 493b8 [kvm_intel].rodata.str1.8 Map: 0-e0 70640 [kvm_intel].data..ro_after_init Map: 0-500 70ec0 [kvm_intel].gnu.linkonce.this_module Map: ffffffffc13a7000-ffffffffc1421000 a0 /lib/modules/6.7.2-local/kernel/arch/x86/kvm/kvm-intel.ko The example above shows how the module section mappings are all wrong except for the main .text mapping at 0xffffffffc13a7000. Signed-off-by: Adrian Hunter --- Changes in V2: - add dump to perf report (if no browser) as well as perf script - add 'perf --debug kmaps' option also to dump kmaps tools/perf/Documentation/perf.txt | 2 ++ tools/perf/builtin-report.c | 2 ++ tools/perf/builtin-script.c | 3 +++ tools/perf/util/debug.c | 3 +++ tools/perf/util/debug.h | 1 + tools/perf/util/python.c | 1 + tools/perf/util/session.c | 11 +++++++++++ tools/perf/util/session.h | 2 ++ 8 files changed, 25 insertions(+) diff --git a/tools/perf/Documentation/perf.txt b/tools/perf/Documentation/perf.txt index ba3df49c169d..feb954a18150 100644 --- a/tools/perf/Documentation/perf.txt +++ b/tools/perf/Documentation/perf.txt @@ -63,6 +63,8 @@ OPTIONS in browser mode perf-event-open - Print perf_event_open() arguments and return value + kmaps - Print kernel and module maps (perf script + and perf report without browser) DESCRIPTION ----------- diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c index 9cb1da2dc0c0..609ccc5cc362 100644 --- a/tools/perf/builtin-report.c +++ b/tools/perf/builtin-report.c @@ -1731,6 +1731,8 @@ int cmd_report(int argc, const char **argv) } else ret = 0; + if (!use_browser && (verbose > 2 || debug_kmaps)) + perf_session__dump_kmaps(session); error: if (report.ptime_range) { itrace_synth_opts__clear_time_range(&itrace_synth_opts); diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c index b1f57401ff23..25c42ad3d120 100644 --- a/tools/perf/builtin-script.c +++ b/tools/perf/builtin-script.c @@ -4366,6 +4366,9 @@ int cmd_script(int argc, const char **argv) flush_scripting(); + if (verbose > 2 || debug_kmaps) + perf_session__dump_kmaps(session); + out_delete: if (script.ptime_range) { itrace_synth_opts__clear_time_range(&itrace_synth_opts); diff --git a/tools/perf/util/debug.c b/tools/perf/util/debug.c index 88378c4c5dd9..f21661aab1b6 100644 --- a/tools/perf/util/debug.c +++ b/tools/perf/util/debug.c @@ -33,6 +33,7 @@ #endif int verbose; +int debug_kmaps; int debug_peo_args; bool dump_trace = false, quiet = false; int debug_ordered_events; @@ -221,6 +222,7 @@ static struct sublevel_option debug_opts[] = { { .name = "stderr", .value_ptr = &redirect_to_stderr}, { .name = "data-convert", .value_ptr = &debug_data_convert }, { .name = "perf-event-open", .value_ptr = &debug_peo_args }, + { .name = "kmaps", .value_ptr = &debug_kmaps }, { .name = NULL, } }; @@ -259,6 +261,7 @@ int perf_quiet_option(void) /* For debug variables that are used as bool types, set to 0. */ redirect_to_stderr = 0; debug_peo_args = 0; + debug_kmaps = 0; return 0; } diff --git a/tools/perf/util/debug.h b/tools/perf/util/debug.h index f99468a7f681..4664f6e9b027 100644 --- a/tools/perf/util/debug.h +++ b/tools/perf/util/debug.h @@ -9,6 +9,7 @@ #include extern int verbose; +extern int debug_kmaps; extern int debug_peo_args; extern bool quiet, dump_trace; extern int debug_ordered_events; diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c index 8761f51b5c7c..075c0f79b1b9 100644 --- a/tools/perf/util/python.c +++ b/tools/perf/util/python.c @@ -181,6 +181,7 @@ int perf_bpf_filter__destroy(struct evsel *evsel __maybe_unused) * implementing 'verbose' and 'eprintf'. */ int verbose; +int debug_kmaps; int debug_peo_args; int eprintf(int level, int var, const char *fmt, ...); diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index 1e9aa8ed15b6..d62a2fdd81d6 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -2704,6 +2704,17 @@ size_t perf_session__fprintf(struct perf_session *session, FILE *fp) return machine__fprintf(&session->machines.host, fp); } +void perf_session__dump_kmaps(struct perf_session *session) +{ + int save_verbose = verbose; + + fflush(stdout); + fprintf(stderr, "Kernel and module maps:\n"); + verbose = 0; /* Suppress verbose to print a summary only */ + maps__fprintf(machine__kernel_maps(&session->machines.host), stderr); + verbose = save_verbose; +} + struct evsel *perf_session__find_first_evtype(struct perf_session *session, unsigned int type) { diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h index ee3715e8563b..5064c6ec11e7 100644 --- a/tools/perf/util/session.h +++ b/tools/perf/util/session.h @@ -133,6 +133,8 @@ size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp, bool skip_empty); +void perf_session__dump_kmaps(struct perf_session *session); + struct evsel *perf_session__find_first_evtype(struct perf_session *session, unsigned int type);