* [PATCH 1/2] perf tools: Do not use __perf_session__process_events() directly @ 2014-11-28 7:11 Namhyung Kim 2014-11-28 7:11 ` [PATCH 2/2] perf record: Show precise number of samples Namhyung Kim 0 siblings, 1 reply; 6+ messages in thread From: Namhyung Kim @ 2014-11-28 7:11 UTC (permalink / raw) To: Arnaldo Carvalho de Melo Cc: Peter Zijlstra, Ingo Molnar, Paul Mackerras, Namhyung Kim, Namhyung Kim, LKML, Jiri Olsa, David Ahern, Adrian Hunter, Andi Kleen It's only used for perf record to process build-id because its file size it's not fixed at this time due to remaining header features. However data offset and size is available so that we can use the perf_session__process_events() once we set the file size as the current offset like for now. Signed-off-by: Namhyung Kim <namhyung@kernel.org> --- tools/perf/builtin-record.c | 7 +++---- tools/perf/util/session.c | 6 +++--- tools/perf/util/session.h | 3 --- 3 files changed, 6 insertions(+), 10 deletions(-) diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 8648c6d3003d..1134de22979e 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -194,12 +194,13 @@ static int process_buildids(struct record *rec) { struct perf_data_file *file = &rec->file; struct perf_session *session = rec->session; - u64 start = session->header.data_offset; u64 size = lseek(file->fd, 0, SEEK_CUR); if (size == 0) return 0; + file->size = size; + /* * During this process, it'll load kernel map and replace the * dso->long_name to a real pathname it found. In this case @@ -211,9 +212,7 @@ static int process_buildids(struct record *rec) */ symbol_conf.ignore_vmlinux_buildid = true; - return __perf_session__process_events(session, start, - size - start, - size, &build_id__mark_dso_hit_ops); + return perf_session__process_events(session, &build_id__mark_dso_hit_ops); } static void perf_event__synthesize_guest_os(struct machine *machine, void *data) diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index 6ac62ae6b8fa..88aa2f09df93 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -1252,9 +1252,9 @@ fetch_mmaped_event(struct perf_session *session, #define NUM_MMAPS 128 #endif -int __perf_session__process_events(struct perf_session *session, - u64 data_offset, u64 data_size, - u64 file_size, struct perf_tool *tool) +static int __perf_session__process_events(struct perf_session *session, + u64 data_offset, u64 data_size, + u64 file_size, struct perf_tool *tool) { int fd = perf_data_file__fd(session->file); u64 head, page_offset, file_offset, file_pos, size; diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h index dc26ebf60fe4..6d663dc76404 100644 --- a/tools/perf/util/session.h +++ b/tools/perf/util/session.h @@ -49,9 +49,6 @@ int perf_session__peek_event(struct perf_session *session, off_t file_offset, union perf_event **event_ptr, struct perf_sample *sample); -int __perf_session__process_events(struct perf_session *session, - u64 data_offset, u64 data_size, u64 size, - struct perf_tool *tool); int perf_session__process_events(struct perf_session *session, struct perf_tool *tool); -- 2.1.2 ^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH 2/2] perf record: Show precise number of samples 2014-11-28 7:11 [PATCH 1/2] perf tools: Do not use __perf_session__process_events() directly Namhyung Kim @ 2014-11-28 7:11 ` Namhyung Kim 2014-11-28 7:14 ` [PATCH v2 " Namhyung Kim 0 siblings, 1 reply; 6+ messages in thread From: Namhyung Kim @ 2014-11-28 7:11 UTC (permalink / raw) To: Arnaldo Carvalho de Melo Cc: Peter Zijlstra, Ingo Molnar, Paul Mackerras, Namhyung Kim, Namhyung Kim, LKML, Jiri Olsa, David Ahern, Adrian Hunter, Andi Kleen, Milian Wolff After perf record finishes, it prints file size and number of samples in the file but this info is wrong since it assumes typical sample size of 24 bytes and divides file size by the value. However as we post-process recorded samples for build-id, it can show correct number like below. If build-id post-processing is not requested just omit the wrong number of samples. $ perf record noploop 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.159 MB perf.data (3989 samples) ] $ perf report --stdio -n # To display the perf.data header info, please use --header/--header-only options. # # Samples: 3K of event 'cycles' # Event count (approx.): 3771330663 # # Overhead Samples Command Shared Object Symbol # ........ ............ ....... ................ .......................... # 99.90% 3982 noploop noploop [.] main 0.09% 1 noploop ld-2.17.so [.] _dl_check_map_versions 0.01% 1 noploop [kernel.vmlinux] [k] setup_arg_pages 0.00% 5 noploop [kernel.vmlinux] [k] intel_pmu_enable_all Reported-by: Milian Wolff <mail@milianw.de> Signed-off-by: Namhyung Kim <namhyung@kernel.org> --- tools/perf/builtin-record.c | 50 +++++++++++++++++++++++++++++++++------------ 1 file changed, 37 insertions(+), 13 deletions(-) diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 1134de22979e..e4e2b5b583b3 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -190,6 +190,19 @@ static int record__open(struct record *rec) return rc; } +static int process_sample_event(struct perf_tool *tool, + union perf_event *event, + struct perf_sample *sample, + struct perf_evsel *evsel, + struct machine *machine) +{ + struct record *rec = container_of(tool, struct record, tool); + + rec->samples++; + + return build_id__mark_dso_hit(tool, event, sample, evsel, machine); +} + static int process_buildids(struct record *rec) { struct perf_data_file *file = &rec->file; @@ -200,6 +213,7 @@ static int process_buildids(struct record *rec) return 0; file->size = size; + rec->samples = 0; /* * During this process, it'll load kernel map and replace the @@ -212,7 +226,7 @@ static int process_buildids(struct record *rec) */ symbol_conf.ignore_vmlinux_buildid = true; - return perf_session__process_events(session, &build_id__mark_dso_hit_ops); + return perf_session__process_events(session, &rec->tool); } static void perf_event__synthesize_guest_os(struct machine *machine, void *data) @@ -503,19 +517,9 @@ static int __cmd_record(struct record *rec, int argc, const char **argv) goto out_child; } - if (!quiet) { + if (!quiet) fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking); - /* - * Approximate RIP event size: 24 bytes. - */ - fprintf(stderr, - "[ perf record: Captured and wrote %.3f MB %s (~%" PRIu64 " samples) ]\n", - (double)rec->bytes_written / 1024.0 / 1024.0, - file->path, - rec->bytes_written / 24); - } - out_child: if (forks) { int exit_status; @@ -537,8 +541,21 @@ static int __cmd_record(struct record *rec, int argc, const char **argv) if (!err && !file->is_pipe) { rec->session->header.data_size += rec->bytes_written; - if (!rec->no_buildid) + if (!rec->no_buildid) { process_buildids(rec); + + if (!quiet) { + fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s (%"PRIu64" samples) ]\n", + (double)rec->bytes_written / 1024.0 / 1024.0, + file->path, rec->samples); + } + } + if (!quiet) { + fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s ]\n", + (double)rec->bytes_written / 1024.0 / 1024.0, + file->path); + } + perf_session__write_header(rec->session, rec->evlist, file->fd, true); } @@ -719,6 +736,13 @@ static struct record record = { .default_per_cpu = true, }, }, + .tool = { + .sample = process_sample_event, + .fork = perf_event__process_fork, + .comm = perf_event__process_comm, + .mmap = perf_event__process_mmap, + .mmap2 = perf_event__process_mmap2, + }, }; #define CALLCHAIN_HELP "setup and enables call-graph (stack chain/backtrace) recording: " -- 2.1.2 ^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH v2 2/2] perf record: Show precise number of samples 2014-11-28 7:11 ` [PATCH 2/2] perf record: Show precise number of samples Namhyung Kim @ 2014-11-28 7:14 ` Namhyung Kim 2014-11-28 12:44 ` Jiri Olsa 0 siblings, 1 reply; 6+ messages in thread From: Namhyung Kim @ 2014-11-28 7:14 UTC (permalink / raw) To: Arnaldo Carvalho de Melo Cc: Peter Zijlstra, Ingo Molnar, Paul Mackerras, Namhyung Kim, Namhyung Kim, LKML, Jiri Olsa, David Ahern, Adrian Hunter, Andi Kleen, Milian Wolff After perf record finishes, it prints file size and number of samples in the file but this info is wrong since it assumes typical sample size of 24 bytes and divides file size by the value. However as we post-process recorded samples for build-id, it can show correct number like below. If build-id post-processing is not requested just omit the wrong number of samples. $ perf record noploop 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.159 MB perf.data (3989 samples) ] $ perf report --stdio -n # To display the perf.data header info, please use --header/--header-only options. # # Samples: 3K of event 'cycles' # Event count (approx.): 3771330663 # # Overhead Samples Command Shared Object Symbol # ........ ............ ....... ................ .......................... # 99.90% 3982 noploop noploop [.] main 0.09% 1 noploop ld-2.17.so [.] _dl_check_map_versions 0.01% 1 noploop [kernel.vmlinux] [k] setup_arg_pages 0.00% 5 noploop [kernel.vmlinux] [k] intel_pmu_enable_all Reported-by: Milian Wolff <mail@milianw.de> Signed-off-by: Namhyung Kim <namhyung@kernel.org> --- tools/perf/builtin-record.c | 53 ++++++++++++++++++++++++++++++++++----------- 1 file changed, 40 insertions(+), 13 deletions(-) diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 1134de22979e..f88f5ccb96dc 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -190,6 +190,19 @@ static int record__open(struct record *rec) return rc; } +static int process_sample_event(struct perf_tool *tool, + union perf_event *event, + struct perf_sample *sample, + struct perf_evsel *evsel, + struct machine *machine) +{ + struct record *rec = container_of(tool, struct record, tool); + + rec->samples++; + + return build_id__mark_dso_hit(tool, event, sample, evsel, machine); +} + static int process_buildids(struct record *rec) { struct perf_data_file *file = &rec->file; @@ -200,6 +213,7 @@ static int process_buildids(struct record *rec) return 0; file->size = size; + rec->samples = 0; /* * During this process, it'll load kernel map and replace the @@ -212,7 +226,7 @@ static int process_buildids(struct record *rec) */ symbol_conf.ignore_vmlinux_buildid = true; - return perf_session__process_events(session, &build_id__mark_dso_hit_ops); + return perf_session__process_events(session, &rec->tool); } static void perf_event__synthesize_guest_os(struct machine *machine, void *data) @@ -503,19 +517,9 @@ static int __cmd_record(struct record *rec, int argc, const char **argv) goto out_child; } - if (!quiet) { + if (!quiet) fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking); - /* - * Approximate RIP event size: 24 bytes. - */ - fprintf(stderr, - "[ perf record: Captured and wrote %.3f MB %s (~%" PRIu64 " samples) ]\n", - (double)rec->bytes_written / 1024.0 / 1024.0, - file->path, - rec->bytes_written / 24); - } - out_child: if (forks) { int exit_status; @@ -535,10 +539,26 @@ static int __cmd_record(struct record *rec, int argc, const char **argv) status = err; if (!err && !file->is_pipe) { + bool print_nr_samples = false; + rec->session->header.data_size += rec->bytes_written; - if (!rec->no_buildid) + if (!rec->no_buildid) { process_buildids(rec); + print_nr_samples = true; + } + + if (!quiet) { + fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s", + (double)rec->bytes_written / 1024.0 / 1024.0, + file->path); + + if (print_nr_samples) + fprintf(stderr, " (%"PRIu64" samples)", rec->samples); + + fputs(" ]\n", stderr); + } + perf_session__write_header(rec->session, rec->evlist, file->fd, true); } @@ -719,6 +739,13 @@ static struct record record = { .default_per_cpu = true, }, }, + .tool = { + .sample = process_sample_event, + .fork = perf_event__process_fork, + .comm = perf_event__process_comm, + .mmap = perf_event__process_mmap, + .mmap2 = perf_event__process_mmap2, + }, }; #define CALLCHAIN_HELP "setup and enables call-graph (stack chain/backtrace) recording: " -- 2.1.2 ^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH v2 2/2] perf record: Show precise number of samples 2014-11-28 7:14 ` [PATCH v2 " Namhyung Kim @ 2014-11-28 12:44 ` Jiri Olsa 2014-11-28 17:56 ` Andi Kleen 0 siblings, 1 reply; 6+ messages in thread From: Jiri Olsa @ 2014-11-28 12:44 UTC (permalink / raw) To: Namhyung Kim Cc: Arnaldo Carvalho de Melo, Peter Zijlstra, Ingo Molnar, Paul Mackerras, Namhyung Kim, LKML, David Ahern, Adrian Hunter, Andi Kleen, Milian Wolff On Fri, Nov 28, 2014 at 04:14:19PM +0900, Namhyung Kim wrote: > After perf record finishes, it prints file size and number of samples > in the file but this info is wrong since it assumes typical sample > size of 24 bytes and divides file size by the value. > > However as we post-process recorded samples for build-id, it can show > correct number like below. If build-id post-processing is not requested > just omit the wrong number of samples. > > $ perf record noploop 1 > [ perf record: Woken up 1 times to write data ] > [ perf record: Captured and wrote 0.159 MB perf.data (3989 samples) ] > > $ perf report --stdio -n > # To display the perf.data header info, please use --header/--header-only options. > # > # Samples: 3K of event 'cycles' > # Event count (approx.): 3771330663 > # > # Overhead Samples Command Shared Object Symbol > # ........ ............ ....... ................ .......................... > # > 99.90% 3982 noploop noploop [.] main > 0.09% 1 noploop ld-2.17.so [.] _dl_check_map_versions > 0.01% 1 noploop [kernel.vmlinux] [k] setup_arg_pages > 0.00% 5 noploop [kernel.vmlinux] [k] intel_pmu_enable_all > > Reported-by: Milian Wolff <mail@milianw.de> > Signed-off-by: Namhyung Kim <namhyung@kernel.org> eeeey great, I mean.. finally ;-) Reviewed-by: Jiri Olsa <jolsa@kernel.org> thanks, jirka ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v2 2/2] perf record: Show precise number of samples 2014-11-28 12:44 ` Jiri Olsa @ 2014-11-28 17:56 ` Andi Kleen 2014-11-28 21:48 ` Arnaldo Carvalho de Melo 0 siblings, 1 reply; 6+ messages in thread From: Andi Kleen @ 2014-11-28 17:56 UTC (permalink / raw) To: Jiri Olsa Cc: Namhyung Kim, Arnaldo Carvalho de Melo, Peter Zijlstra, Ingo Molnar, Paul Mackerras, Namhyung Kim, LKML, David Ahern, Adrian Hunter, Andi Kleen, Milian Wolff > > Reported-by: Milian Wolff <mail@milianw.de> > > Signed-off-by: Namhyung Kim <namhyung@kernel.org> > > eeeey great, I mean.. finally ;-) Yes I like it too. BTW it would be nice if we could show down a break down on how many bytes the different options passed to perf record added, by accounting the different header fields. That would guide people who suffer from too large perf.data files. -Andi ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v2 2/2] perf record: Show precise number of samples 2014-11-28 17:56 ` Andi Kleen @ 2014-11-28 21:48 ` Arnaldo Carvalho de Melo 0 siblings, 0 replies; 6+ messages in thread From: Arnaldo Carvalho de Melo @ 2014-11-28 21:48 UTC (permalink / raw) To: Andi Kleen Cc: Jiri Olsa, Namhyung Kim, Peter Zijlstra, Ingo Molnar, Paul Mackerras, Namhyung Kim, LKML, David Ahern, Adrian Hunter, Milian Wolff Em Fri, Nov 28, 2014 at 06:56:13PM +0100, Andi Kleen escreveu: > > > Reported-by: Milian Wolff <mail@milianw.de> > > > Signed-off-by: Namhyung Kim <namhyung@kernel.org> > > > > eeeey great, I mean.. finally ;-) > > Yes I like it too. > > BTW it would be nice if we could show down a break down on how many > bytes the different options passed to perf record added, by accounting > the different header fields. That would guide people who suffer > from too large perf.data files. That is a good idea, after perf_evsel__parse_sample() we add up the things that are variable: callchains, branch_stack, etc. Will implement if nobody does it first :-) - Arnaldo ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2014-11-28 21:48 UTC | newest] Thread overview: 6+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2014-11-28 7:11 [PATCH 1/2] perf tools: Do not use __perf_session__process_events() directly Namhyung Kim 2014-11-28 7:11 ` [PATCH 2/2] perf record: Show precise number of samples Namhyung Kim 2014-11-28 7:14 ` [PATCH v2 " Namhyung Kim 2014-11-28 12:44 ` Jiri Olsa 2014-11-28 17:56 ` Andi Kleen 2014-11-28 21:48 ` Arnaldo Carvalho de Melo
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