From 342955593af08f185279e074b3d77719d2f23b82 Mon Sep 17 00:00:00 2001 From: Shawn Bohrer Date: Tue, 30 Nov 2010 19:57:11 -0600 Subject: perf diff: Fix displacement and modules options short flag The --displacement and --modules options to perf diff both use -m as a short flag. Change --displacement to use -M since other perf commands use -m, --modules. Cc: Ingo Molnar Cc: Paul Mackerras Cc: Peter Zijlstra LKML-Reference: <1291168642-11402-4-git-send-email-shawn.bohrer@gmail.com> Signed-off-by: Shawn Bohrer Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-diff.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'tools/perf/builtin-diff.c') diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c index fca1d4402910..221b823bc26f 100644 --- a/tools/perf/builtin-diff.c +++ b/tools/perf/builtin-diff.c @@ -173,7 +173,7 @@ static const char * const diff_usage[] = { static const struct option options[] = { OPT_INCR('v', "verbose", &verbose, "be more verbose (show symbol address, etc)"), - OPT_BOOLEAN('m', "displacement", &show_displacement, + OPT_BOOLEAN('M', "displacement", &show_displacement, "Show position displacement relative to baseline"), OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, "dump raw trace in ASCII"), -- cgit v1.2.3 From 640c03ce837fe8d4b56342aba376ea0da3960459 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Thu, 2 Dec 2010 14:10:21 -0200 Subject: perf session: Parse sample earlier MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit At perf_session__process_event, so that we reduce the number of lines in eache tool sample processing routine that now receives a sample_data pointer already parsed. This will also be useful in the next patch, where we'll allow sample the identity fields in MMAP, FORK, EXIT, etc, when it will be possible to see (cpu, timestamp) just after before every event. Also validate callchains in perf_session__process_event, i.e. as early as possible, and keep a counter of the number of events discarded due to invalid callchains, warning the user about it if it happens. There is an assumption that was kept that all events have the same sample_type, that will be dealt with in the future, when this preexisting limitation will be removed. Tested-by: Thomas Gleixner Reviewed-by: Thomas Gleixner Acked-by: Ian Munsie Acked-by: Thomas Gleixner Cc: Frédéric Weisbecker Cc: Ian Munsie Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Paul Mackerras Cc: Stephane Eranian LKML-Reference: <1291318772-30880-4-git-send-email-acme@infradead.org> Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-diff.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) (limited to 'tools/perf/builtin-diff.c') diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c index 221b823bc26f..5e1a043aae03 100644 --- a/tools/perf/builtin-diff.c +++ b/tools/perf/builtin-diff.c @@ -30,12 +30,13 @@ static int hists__add_entry(struct hists *self, return -ENOMEM; } -static int diff__process_sample_event(event_t *event, struct perf_session *session) +static int diff__process_sample_event(event_t *event, + struct sample_data *sample, + struct perf_session *session) { struct addr_location al; - struct sample_data data = { .period = 1, }; - if (event__preprocess_sample(event, session, &al, &data, NULL) < 0) { + if (event__preprocess_sample(event, session, &al, sample, NULL) < 0) { pr_warning("problem processing %d event, skipping it.\n", event->header.type); return -1; @@ -44,12 +45,12 @@ static int diff__process_sample_event(event_t *event, struct perf_session *sessi if (al.filtered || al.sym == NULL) return 0; - if (hists__add_entry(&session->hists, &al, data.period)) { + if (hists__add_entry(&session->hists, &al, sample->period)) { pr_warning("problem incrementing symbol period, skipping event\n"); return -1; } - session->hists.stats.total_period += data.period; + session->hists.stats.total_period += sample->period; return 0; } -- cgit v1.2.3 From 21ef97f05a7da5bc23b26cb34d6746f83ca9bf20 Mon Sep 17 00:00:00 2001 From: Ian Munsie Date: Fri, 10 Dec 2010 14:09:16 +1100 Subject: perf session: Fallback to unordered processing if no sample_id_all If we are running the new perf on an old kernel without support for sample_id_all, we should fall back to the old unordered processing of events. If we didn't than we would *always* process events without timestamps out of order, whether or not we hit a reordering race. In other words, instead of there being a chance of not attributing samples correctly, we would guarantee that samples would not be attributed. While processing all events without timestamps before events with timestamps may seem like an intuitive solution, it falls down as PERF_RECORD_EXIT events would also be processed before any samples. Even with a workaround for that case, samples before/after an exec would not be attributed correctly. This patch allows commands to indicate whether they need to fall back to unordered processing, so that commands that do not care about timestamps on every event will not be affected. If we do fallback, this will print out a warning if report -D was invoked. This patch adds the test in perf_session__new so that we only need to test once per session. Commands that do not use an event_ops (such as record and top) can simply pass NULL in it's place. Acked-by: Thomas Gleixner Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Peter Zijlstra Cc: Thomas Gleixner LKML-Reference: <1291951882-sup-6069@au1.ibm.com> Signed-off-by: Ian Munsie Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-diff.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'tools/perf/builtin-diff.c') diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c index 5e1a043aae03..af84e1c0519d 100644 --- a/tools/perf/builtin-diff.c +++ b/tools/perf/builtin-diff.c @@ -142,8 +142,8 @@ static int __cmd_diff(void) int ret, i; struct perf_session *session[2]; - session[0] = perf_session__new(input_old, O_RDONLY, force, false); - session[1] = perf_session__new(input_new, O_RDONLY, force, false); + session[0] = perf_session__new(input_old, O_RDONLY, force, false, &event_ops); + session[1] = perf_session__new(input_new, O_RDONLY, force, false, &event_ops); if (session[0] == NULL || session[1] == NULL) return -ENOMEM; -- cgit v1.2.3 From eac23d1c384b55e4bbb89ea9e5a6bb77fb4d1140 Mon Sep 17 00:00:00 2001 From: Ian Munsie Date: Thu, 9 Dec 2010 16:33:53 +1100 Subject: perf record,report,annotate,diff: Process events in order This patch changes perf report to ask for the ID info on all events be default if recording from multiple CPUs. Perf report, annotate and diff will now process the events in order if the kernel is able to provide timestamps on all events. This ensures that events such as COMM and MMAP which are necessary to correctly interpret samples are processed prior to those samples so that they are attributed correctly. Before: # perf record ./cachetest # perf report # Events: 6K cycles # # Overhead Command Shared Object Symbol # ........ ....... ................. ............................... # 74.11% :3259 [unknown] [k] 0x4a6c 1.50% cachetest ld-2.11.2.so [.] 0x1777c 1.46% :3259 [kernel.kallsyms] [k] .perf_event_mmap_ctx 1.25% :3259 [kernel.kallsyms] [k] restore 0.74% :3259 [kernel.kallsyms] [k] ._raw_spin_lock 0.71% :3259 [kernel.kallsyms] [k] .filemap_fault 0.66% :3259 [kernel.kallsyms] [k] .memset 0.54% cachetest [kernel.kallsyms] [k] .sha_transform 0.54% :3259 [kernel.kallsyms] [k] .copy_4K_page 0.54% :3259 [kernel.kallsyms] [k] .find_get_page 0.52% :3259 [kernel.kallsyms] [k] .trace_hardirqs_off 0.50% :3259 [kernel.kallsyms] [k] .__do_fault After: # perf report # Events: 6K cycles # # Overhead Command Shared Object Symbol # ........ ....... ................. ............................... # 44.28% cachetest cachetest [.] sumArrayNaive 22.53% cachetest cachetest [.] sumArrayOptimal 6.59% cachetest ld-2.11.2.so [.] 0x1777c 2.13% cachetest [unknown] [k] 0x340 1.46% cachetest [kernel.kallsyms] [k] .perf_event_mmap_ctx 1.25% cachetest [kernel.kallsyms] [k] restore 0.74% cachetest [kernel.kallsyms] [k] ._raw_spin_lock 0.71% cachetest [kernel.kallsyms] [k] .filemap_fault 0.66% cachetest [kernel.kallsyms] [k] .memset 0.54% cachetest [kernel.kallsyms] [k] .copy_4K_page 0.54% cachetest [kernel.kallsyms] [k] .find_get_page 0.54% cachetest [kernel.kallsyms] [k] .sha_transform 0.52% cachetest [kernel.kallsyms] [k] .trace_hardirqs_off 0.50% cachetest [kernel.kallsyms] [k] .__do_fault Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Thomas Gleixner LKML-Reference: <1291872833-839-1-git-send-email-imunsie@au1.ibm.com> Signed-off-by: Ian Munsie Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-diff.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'tools/perf/builtin-diff.c') diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c index af84e1c0519d..97846dcafc63 100644 --- a/tools/perf/builtin-diff.c +++ b/tools/perf/builtin-diff.c @@ -61,6 +61,8 @@ static struct perf_event_ops event_ops = { .exit = event__process_task, .fork = event__process_task, .lost = event__process_lost, + .ordered_samples = true, + .ordering_requires_timestamps = true, }; static void perf_session__insert_hist_entry_by_name(struct rb_root *root, -- cgit v1.2.3 From ec5761eab318e50e69fcf8e63e9edaef5949c067 Mon Sep 17 00:00:00 2001 From: David Ahern Date: Thu, 9 Dec 2010 13:27:07 -0700 Subject: perf symbols: Add symfs option for off-box analysis using specified tree The symfs argument allows analysis of perf.data file using a locally accessible filesystem tree with debug symbols - e.g., tree created during image builds, sshfs mount, loop mounted KVM disk images, USB keys, initrds, etc. Anything with an OS tree can be analyzed from anywhere without the need to populate a local data store with build-ids. Commiter notes: o Fixed up symfs="/" variants handling. o prefixed DSO__ORIG_GUEST_KMODULE case with symfs too, avoiding use of files outside the symfs directory. LKML-Reference: <1291926427-28846-1-git-send-email-daahern@cisco.com> Signed-off-by: David Ahern Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-diff.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'tools/perf/builtin-diff.c') diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c index 97846dcafc63..3153e492dbcc 100644 --- a/tools/perf/builtin-diff.c +++ b/tools/perf/builtin-diff.c @@ -194,6 +194,8 @@ static const struct option options[] = { OPT_STRING('t', "field-separator", &symbol_conf.field_sep, "separator", "separator for columns, no spaces will be added between " "columns '.' is reserved."), + OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory", + "Look for files with symbols relative to this directory"), OPT_END() }; -- cgit v1.2.3