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| author | Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> | 2016-06-15 05:28:40 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-06-15 19:34:42 +0200 |
| commit | 2fd457a34525ea3bc609e377b46af759af8a7934 (patch) | |
| tree | 130c83a2f6937ffa81d00ec661d223cab7a37715 | |
| parent | perf probe: Introduce perf_cache interfaces (diff) | |
| download | linux-2fd457a34525ea3bc609e377b46af759af8a7934.tar.xz linux-2fd457a34525ea3bc609e377b46af759af8a7934.zip | |
perf probe: Add --cache option to cache the probe definitions
Add --cache option to cache the probe definitions. This just saves the
result of the dwarf analysis to probe cache.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Hemant Kumar <hemant@linux.vnet.ibm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20160615032840.31330.44412.stgit@devbox
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/Documentation/perf-probe.txt | 4 | ||||
| -rw-r--r-- | tools/perf/builtin-probe.c | 1 | ||||
| -rw-r--r-- | tools/perf/util/probe-event.c | 9 | ||||
| -rw-r--r-- | tools/perf/util/probe-event.h | 1 |
4 files changed, 15 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-probe.txt b/tools/perf/Documentation/perf-probe.txt index 3a8a9ba2b041..947db6fe512c 100644 --- a/tools/perf/Documentation/perf-probe.txt +++ b/tools/perf/Documentation/perf-probe.txt @@ -109,6 +109,10 @@ OPTIONS Dry run. With this option, --add and --del doesn't execute actual adding and removal operations. +--cache:: + Cache the probes (with --add option). Any events which successfully added + are also stored in the cache file. + --max-probes=NUM:: Set the maximum number of probe points for an event. Default is 128. diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c index 9af859b28b15..6d7ab4316449 100644 --- a/tools/perf/builtin-probe.c +++ b/tools/perf/builtin-probe.c @@ -512,6 +512,7 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused) "Enable symbol demangling"), OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel, "Enable kernel symbol demangling"), + OPT_BOOLEAN(0, "cache", &probe_conf.cache, "Manipulate probe cache"), OPT_END() }; int ret; diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index cbc8a8bf0f36..084756c17309 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -2514,6 +2514,7 @@ static int __add_probe_trace_events(struct perf_probe_event *pev, { int i, fd, ret; struct probe_trace_event *tev = NULL; + struct probe_cache *cache = NULL; struct strlist *namelist; fd = probe_file__open(PF_FL_RW | (pev->uprobes ? PF_FL_UPROBE : 0)); @@ -2555,6 +2556,14 @@ static int __add_probe_trace_events(struct perf_probe_event *pev, } if (ret == -EINVAL && pev->uprobes) warn_uprobe_event_compat(tev); + if (ret == 0 && probe_conf.cache) { + cache = probe_cache__new(pev->target); + if (!cache || + probe_cache__add_entry(cache, pev, tevs, ntevs) < 0 || + probe_cache__commit(cache) < 0) + pr_warning("Failed to add event to probe cache\n"); + probe_cache__delete(cache); + } strlist__delete(namelist); close_out: diff --git a/tools/perf/util/probe-event.h b/tools/perf/util/probe-event.h index 0b024ba789e3..432b690d3f17 100644 --- a/tools/perf/util/probe-event.h +++ b/tools/perf/util/probe-event.h @@ -12,6 +12,7 @@ struct probe_conf { bool show_location_range; bool force_add; bool no_inlines; + bool cache; int max_probes; }; extern struct probe_conf probe_conf; |