Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757257Ab3H3TAz (ORCPT ); Fri, 30 Aug 2013 15:00:55 -0400 Received: from merlin.infradead.org ([205.233.59.134]:45601 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756871Ab3H3S7Q (ORCPT ); Fri, 30 Aug 2013 14:59:16 -0400 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, David Ahern , Adrian Hunter , Frederic Weisbecker , Mike Galbraith , Paul Mackerras , Peter Zijlstra , Stephane Eranian , Arnaldo Carvalho de Melo Subject: [PATCH 13/15] perf trace: Add option to analyze events in a file versus live Date: Fri, 30 Aug 2013 15:58:56 -0300 Message-Id: <1377889138-8793-14-git-send-email-acme@infradead.org> X-Mailer: git-send-email 1.8.1.4 In-Reply-To: <1377889138-8793-1-git-send-email-acme@infradead.org> References: <1377889138-8793-1-git-send-email-acme@infradead.org> X-SRS-Rewrite: SMTP reverse-path rewritten from by merlin.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6007 Lines: 188 From: David Ahern Allows capture of raw_syscall:* events and analyzed at a later time. v2: change -i option from inherit to input name for consistency with other perf commands Signed-off-by: David Ahern Cc: Adrian Hunter Cc: Frederic Weisbecker Cc: Mike Galbraith Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/r/1377750593-48046-3-git-send-email-dsahern@gmail.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Documentation/perf-trace.txt | 4 ++ tools/perf/builtin-trace.c | 98 ++++++++++++++++++++++++++++++++- 2 files changed, 100 insertions(+), 2 deletions(-) diff --git a/tools/perf/Documentation/perf-trace.txt b/tools/perf/Documentation/perf-trace.txt index fe19811..daccd2c 100644 --- a/tools/perf/Documentation/perf-trace.txt +++ b/tools/perf/Documentation/perf-trace.txt @@ -74,6 +74,10 @@ the thread executes on the designated CPUs. Default is to monitor all CPUs. --sched: Accrue thread runtime and provide a summary at the end of the session. +-i +--input + Process events from a given perf data file. + SEE ALSO -------- linkperf:perf-record[1], linkperf:perf-script[1] diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index 88387c5..2a6ebe1 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -4,6 +4,7 @@ #include "util/debug.h" #include "util/evlist.h" #include "util/machine.h" +#include "util/session.h" #include "util/thread.h" #include "util/parse-options.h" #include "util/strlist.h" @@ -652,6 +653,36 @@ out_dump: return 0; } +static int trace__process_sample(struct perf_tool *tool, + union perf_event *event __maybe_unused, + struct perf_sample *sample, + struct perf_evsel *evsel, + struct machine *machine __maybe_unused) +{ + struct trace *trace = container_of(tool, struct trace, tool); + int err = 0; + + tracepoint_handler handler = evsel->handler.func; + + if (trace->base_time == 0) + trace->base_time = sample->time; + + if (handler) + handler(trace, evsel, sample); + + return err; +} + +static bool +perf_session__has_tp(struct perf_session *session, const char *name) +{ + struct perf_evsel *evsel; + + evsel = perf_evlist__find_tracepoint_by_name(session->evlist, name); + + return evsel != NULL; +} + static int trace__run(struct trace *trace, int argc, const char **argv) { struct perf_evlist *evlist = perf_evlist__new(); @@ -791,6 +822,65 @@ out: return err; } +static int trace__replay(struct trace *trace) +{ + const struct perf_evsel_str_handler handlers[] = { + { "raw_syscalls:sys_enter", trace__sys_enter, }, + { "raw_syscalls:sys_exit", trace__sys_exit, }, + }; + + struct perf_session *session; + int err = -1; + + trace->tool.sample = trace__process_sample; + trace->tool.mmap = perf_event__process_mmap; + trace->tool.comm = perf_event__process_comm; + trace->tool.exit = perf_event__process_exit; + trace->tool.fork = perf_event__process_fork; + trace->tool.attr = perf_event__process_attr; + trace->tool.tracing_data = perf_event__process_tracing_data; + trace->tool.build_id = perf_event__process_build_id; + + trace->tool.ordered_samples = true; + trace->tool.ordering_requires_timestamps = true; + + /* add tid to output */ + trace->multiple_threads = true; + + if (symbol__init() < 0) + return -1; + + session = perf_session__new(input_name, O_RDONLY, 0, false, + &trace->tool); + if (session == NULL) + return -ENOMEM; + + err = perf_session__set_tracepoints_handlers(session, handlers); + if (err) + goto out; + + if (!perf_session__has_tp(session, "raw_syscalls:sys_enter")) { + pr_err("Data file does not have raw_syscalls:sys_enter events\n"); + goto out; + } + + if (!perf_session__has_tp(session, "raw_syscalls:sys_exit")) { + pr_err("Data file does not have raw_syscalls:sys_exit events\n"); + goto out; + } + + setup_pager(); + + err = perf_session__process_events(session, &trace->tool); + if (err) + pr_err("Failed to process events, error %d", err); + +out: + perf_session__delete(session); + + return err; +} + static size_t trace__fprintf_threads_header(FILE *fp) { size_t printed; @@ -892,6 +982,7 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused) OPT_STRING('e', "expr", &ev_qualifier_str, "expr", "list of events to trace"), OPT_STRING('o', "output", &output_name, "file", "output file name"), + OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"), OPT_STRING('p', "pid", &trace.opts.target.pid, "pid", "trace events on existing process id"), OPT_STRING('t', "tid", &trace.opts.target.tid, "tid", @@ -900,7 +991,7 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused) "system-wide collection from all CPUs"), OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu", "list of cpus to monitor"), - OPT_BOOLEAN('i', "no-inherit", &trace.opts.no_inherit, + OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit, "child tasks do not inherit counters"), OPT_UINTEGER('m', "mmap-pages", &trace.opts.mmap_pages, "number of mmap data pages"), @@ -958,7 +1049,10 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused) if (!argc && perf_target__none(&trace.opts.target)) trace.opts.target.system_wide = true; - err = trace__run(&trace, argc, argv); + if (input_name) + err = trace__replay(&trace); + else + err = trace__run(&trace, argc, argv); if (trace.sched && !err) trace__fprintf_thread_summary(&trace, trace.output); -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/