From: Jiri Olsa <jolsa@redhat.com>
To: David Miller <davem@davemloft.net>
Cc: acme@kernel.org, linux-kernel@vger.kernel.org,
namhyung@kernel.org, jolsa@kernel.org
Subject: Re: [PATCH RFC] hist lookups
Date: Mon, 5 Nov 2018 21:34:47 +0100 [thread overview]
Message-ID: <20181105203447.GA25674@krava> (raw)
In-Reply-To: <20181104.165039.878682622135788379.davem@davemloft.net>
On Sun, Nov 04, 2018 at 04:50:39PM -0800, David Miller wrote:
> From: Jiri Olsa <jolsa@redhat.com>
> Date: Sun, 4 Nov 2018 21:18:21 +0100
>
> > do you have some code I could check on?
>
> All I have is this patch which parallelizes the mmap readers in perf
> top.
I put something together.. still testing, but it's already
showing 0 lost events when for 'overwrite = 0' case even
for high load.. the old code shows ~1500 for same workload
I'm printing lost event counts in stdio output header:
# perf top -d 1 --stdio
PerfTop: 5734 irqs/sec kernel:57.3% exact: 100.0% lost: 0 [4000Hz cycles:ppp], (all, 8 CPUs)
will probably add it to tui as well, seems useful
I pushed it in perf/fixes branch in:
git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
it's stil work in prograss.. not too manye complete changelogs ;-)
jirka
next prev parent reply other threads:[~2018-11-05 20:34 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-31 5:03 [PATCH RFC] hist lookups David Miller
2018-10-31 12:43 ` Arnaldo Carvalho de Melo
2018-10-31 15:39 ` Jiri Olsa
2018-10-31 16:08 ` David Miller
2018-11-03 6:30 ` David Miller
2018-11-04 20:18 ` Jiri Olsa
2018-11-05 0:50 ` David Miller
2018-11-05 20:34 ` Jiri Olsa [this message]
2018-11-05 22:52 ` David Miller
2018-11-06 3:45 ` David Miller
2018-11-06 4:03 ` David Miller
2018-11-06 4:53 ` David Miller
2018-11-06 11:54 ` Jiri Olsa
2018-11-19 5:26 ` Namhyung Kim
2018-11-19 9:12 ` Jiri Olsa
2018-11-20 1:13 ` Namhyung Kim
2018-11-06 20:42 ` Jiri Olsa
2018-11-07 6:13 ` David Miller
2018-11-07 8:32 ` Jiri Olsa
2018-11-07 19:43 ` Jiri Olsa
2018-11-07 20:01 ` David Miller
2018-11-07 20:28 ` Arnaldo Carvalho de Melo
2018-11-08 6:04 ` David Miller
2018-11-08 7:13 ` Jiri Olsa
2018-11-09 1:07 ` David Miller
2018-11-11 19:41 ` Jiri Olsa
2018-11-11 19:41 ` Jiri Olsa
2018-11-11 22:32 ` David Miller
2018-11-11 22:43 ` Jiri Olsa
2018-11-11 22:58 ` David Miller
2018-11-11 23:08 ` David Miller
2018-11-11 23:26 ` Jiri Olsa
2018-11-11 23:32 ` David Miller
2018-11-13 10:40 ` Jiri Olsa
2018-11-19 4:52 ` David Miller
2018-11-19 6:28 ` Namhyung Kim
2018-11-19 6:33 ` David Miller
2018-11-19 7:16 ` Namhyung Kim
2018-11-19 9:14 ` Jiri Olsa
2018-11-06 11:51 ` Jiri Olsa
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