From: Jiri Olsa <jolsa@redhat.com>
To: Ian Rogers <irogers@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Namhyung Kim <namhyung@kernel.org>,
Petr Mladek <pmladek@suse.com>,
Andrey Zhizhikin <andrey.z@gmail.com>,
Kefeng Wang <wangkefeng.wang@huawei.com>,
Thomas Gleixner <tglx@linutronix.de>,
Kan Liang <kan.liang@linux.intel.com>,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
Stephane Eranian <eranian@google.com>
Subject: Re: [PATCH 1/5] perf bench: add event synthesis benchmark
Date: Thu, 2 Apr 2020 15:41:17 +0200 [thread overview]
Message-ID: <20200402134117.GK2518490@krava> (raw)
In-Reply-To: <20200401233945.133550-2-irogers@google.com>
On Wed, Apr 01, 2020 at 04:39:41PM -0700, Ian Rogers wrote:
> Event synthesis may occur at the start or end (tail) of a perf command.
> In system-wide mode it can scan every process in /proc, which may add
> seconds of latency before event recording. Add a new benchmark that
> times how long event synthesis takes with and without data synthesis.
>
> Signed-off-by: Ian Rogers <irogers@google.com>
awesome, please put the command line example in changelog
jirka
next prev parent reply other threads:[~2020-04-02 13:41 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-01 23:39 [PATCH 0/5] Benchmark and improve event synthesis performance Ian Rogers
2020-04-01 23:39 ` [PATCH 1/5] perf bench: add event synthesis benchmark Ian Rogers
2020-04-02 13:41 ` Jiri Olsa [this message]
2020-04-01 23:39 ` [PATCH 2/5] tools api fs: make xxx__mountpoint() more scalable Ian Rogers
2020-04-01 23:39 ` [PATCH 3/5] perf synthetic-events: save 4kb from 2 stack frames Ian Rogers
2020-04-01 23:39 ` [PATCH 4/5] tools api: add a lightweight buffered reading api Ian Rogers
2020-04-02 13:41 ` Jiri Olsa
2020-04-01 23:39 ` [PATCH 5/5] perf synthetic events: Remove use of sscanf from /proc reading Ian Rogers
2020-04-02 13:40 ` Jiri Olsa
2020-04-02 13:41 ` Jiri Olsa
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