On Wed, 15 Jun 2016 14:38:59 -0300 Arnaldo Carvalho de Melo <[email protected]> wrote:
> Em Wed, Jun 15, 2016 at 12:28:40PM +0900, Masami Hiramatsu escreveu: > > From: Masami Hiramatsu <[email protected]> > > > > Add --cache option to cache the probe definitions. This > > just saves the result of the dwarf analysis to probe cache. > > So, I applied up to this patch and will test build and send to Ingo > today, but from this point on I think you should provide usage examples, > i.e. use the options introduced, showing what effects it has on > the cache, etc. Hmm, OK, I'll add that on perf-probe.txt, but anyway, unless [8/23] perf probe just write events in cache files, but not reuse (read) the cache entries. IOW, it would be just a waste of disk space.... Thank you, > > - Arnaldo > > > Signed-off-by: Masami Hiramatsu <[email protected]> > > Signed-off-by: Masami Hiramatsu <[email protected]> > > --- > > Changes in v11: > > - Check failure of probe_cache operations and warn it. > > Changes in v10: > > - Split into 5 subpatches. > > Changes in v6: > > - Remove unneeded O_APPEND from open(). (Thanks Namhyung!) > > - Fix to check the return value of probe_cache_entry__new and > > strdup.(ditto) > > Changes in v5: > > - Move probe_cache* definitions. (code cleanup) > > > > Changes in v4: > > - Remove cache saving failure message. > > --- > > tools/perf/Documentation/perf-probe.txt | 4 ++++ > > tools/perf/builtin-probe.c | 1 + > > tools/perf/util/probe-event.c | 9 +++++++++ > > tools/perf/util/probe-event.h | 1 + > > 4 files changed, 15 insertions(+) > > > > diff --git a/tools/perf/Documentation/perf-probe.txt > > b/tools/perf/Documentation/perf-probe.txt > > index 3a8a9ba..947db6f 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 9af859b..6d7ab431 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 cbc8a8b..084756c 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 0b024ba..432b690 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; -- Masami Hiramatsu <[email protected]>
