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Date: Sun, 9 Jan 2022 14:13:09 +0100 From: Jiri Olsa <jolsa@...hat.com> To: Namhyung Kim <namhyung@...nel.org> Cc: Arnaldo Carvalho de Melo <acme@...nel.org>, Ingo Molnar <mingo@...nel.org>, Peter Zijlstra <peterz@...radead.org>, LKML <linux-kernel@...r.kernel.org>, Andi Kleen <ak@...ux.intel.com>, Ian Rogers <irogers@...gle.com> Subject: Re: [PATCHSET 0/6] perf lock: Random updates for the locking analysis (v1) On Tue, Jan 04, 2022 at 10:20:48AM -0800, Namhyung Kim wrote: SNIP > With -c option, the hrtimer_bases.lock would be combined into a single > entry. Also note that the lock names are correctly displayed now. > > # perf lock report -c > Name acquired contended avg wait (ns) total wait (ns) max wait (ns) min wait (ns) > > rcu_read_lock 251225 0 0 0 0 0 > hrtimer_bases.lock 39449 0 0 0 0 0 > &sb->s_type->i_l... 10301 1 662 662 662 662 > ptlock_ptr(page) 10173 2 701 1402 760 642 > &(ei->i_block_re... 8732 0 0 0 0 0 > &base->lock 6705 0 0 0 0 0 > &p->pi_lock 5549 0 0 0 0 0 > &dentry->d_lockr... 5010 4 1274 5097 1844 789 > &ep->lock 2750 0 0 0 0 0 > &(__futex_data.q... 2331 0 0 0 0 0 > (null) 1878 0 0 0 0 0 > cpu_hotplug_lock 1350 0 0 0 0 0 > &____s->seqcount 1349 0 0 0 0 0 > &newf->file_lock 1001 15 1025 15388 2279 618 > ... > > Maybe we can make it default later (with a config and --no-combine-locks). > > You can get it from 'perf/lock-combine-v1' branch at > > git://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git > > Thanks, > Namhyung > > > Namhyung Kim (6): > perf lock: Convert lockhash_table to use hlist > perf lock: Change type of lock_stat->addr to u64 > perf lock: Sort map info based on class name > perf lock: Fix lock name length check for printing > perf lock: Add -c/--combine-locks option > perf lock: Carefully combine lock stats for discarded entries > > tools/perf/Documentation/perf-lock.txt | 4 + > tools/perf/builtin-lock.c | 155 +++++++++++++++++++------ > 2 files changed, 124 insertions(+), 35 deletions(-) LGTM Acked-by: Jiri Olsa <jolsa@...hat.com> thanks, jirka > > > base-commit: b9f6fbb3b2c29736970ae9fcc0e82b0bd459442b > -- > 2.34.1.448.ga2b2bfdf31-goog >
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