From: Jiri Olsa <jolsa@redhat.com>
To: kan.liang@intel.com
Cc: peterz@infradead.org, mingo@redhat.com, acme@kernel.org,
linux-kernel@vger.kernel.org, alexander.shishkin@linux.intel.com,
tglx@linutronix.de, namhyung@kernel.org, jolsa@kernel.org,
adrian.hunter@intel.com, wangnan0@huawei.com,
mark.rutland@arm.com, andi@firstfloor.org
Subject: Re: [PATCH V2 09/13] perf script: show kernel overhead
Date: Sun, 4 Dec 2016 22:25:48 +0100 [thread overview]
Message-ID: <20161204212548.GA8859@krava> (raw)
In-Reply-To: <1480713561-6617-10-git-send-email-kan.liang@intel.com>
On Fri, Dec 02, 2016 at 04:19:17PM -0500, kan.liang@intel.com wrote:
> From: Kan Liang <kan.liang@intel.com>
>
> Shows kernel overhead in perf script.
>
> The output is as below:
>
> perf script --show-profiling-cost-events
> perf 29001 79989.093958: 1 cycles:
> ffffffff81064ca6 native_write_msr (/lib/
> sleep 29001 79989.094282: 7661 cycles:
> ffffffff810dc433 update_blocked_averages
> sleep 29001 79989.094294: 7442 cycles:
> ffffffff81810f60 irq_work_interrupt (/li
> sleep 29001 79989.094305: 25466 cycles:
> ffffffff813ca410 radix_tree_next_chunk (
> sleep 29001 79989.094340: 94368 cycles:
> ffffffff8180fa90 page_fault (/lib/module
> sleep 29001 79989.094459: 167362 cycles:
> ffffffff811e3f79 alloc_set_pte (/lib/mod
> sleep 29001 79989.094672: 190283 cycles:
> 7f5d7c91d8e7 _dl_addr (/usr/lib64/li
> sleep 29001 79991.094978: 194526 cycles:
> ffffffff811e0579 __tlb_remove_page_size.
> sleep 29001 79991.095061: PERF_RECORD_OVERHEAD [SAMPLE] nr: 8
> time: 28110
> sleep 29001 79991.095062: PERF_RECORD_OVERHEAD [SB] nr: 24
> time: 41397
hi,
got segfault by running:
[jolsa@ibm-x3650m4-01 perf]$ catchsegv ./perf --no-pager script --show-profiling-cost-events
Backtrace:
/home/jolsa/linux-perf/tools/perf/builtin-script.c:1281(process_overhead_event)[0x4351c4]
/home/jolsa/linux-perf/tools/perf/util/session.c:1399(perf_session__process_user_event)[0x4e997b]
/home/jolsa/linux-perf/tools/perf/util/session.c:1501(perf_session__process_event)[0x4e9de3]
/home/jolsa/linux-perf/tools/perf/util/session.c:1918 (discriminator 1)(__perf_session__process_events)[0x4eae1b]
/home/jolsa/linux-perf/tools/perf/util/session.c:1972(perf_session__process_events)[0x4eb019]
/home/jolsa/linux-perf/tools/perf/builtin-script.c:1321(__cmd_script)[0x43538c]
/home/jolsa/linux-perf/tools/perf/builtin-script.c:2498(cmd_script)[0x438f8e]
/home/jolsa/linux-perf/tools/perf/perf.c:358(run_builtin)[0x495452]
/home/jolsa/linux-perf/tools/perf/perf.c:420(handle_internal_command)[0x4956bf]
/home/jolsa/linux-perf/tools/perf/perf.c:469(run_argv)[0x495804]
/home/jolsa/linux-perf/tools/perf/perf.c:610(main)[0x495bed]
/lib64/libc.so.6(__libc_start_main+0xf1)[0x7f5932390401]
??:?(_start)[0x40a80a]
??:0(??)[0x0]
jirka
next prev parent reply other threads:[~2016-12-04 21:25 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-02 21:19 [PATCH V2 00/13] export perf overheads information kan.liang
2016-12-02 21:19 ` [PATCH V2 01/13] perf/core: Introduce PERF_RECORD_OVERHEAD kan.liang
2016-12-06 11:26 ` Peter Zijlstra
2016-12-02 21:19 ` [PATCH V2 02/13] perf/core: output overhead when sched out from context kan.liang
2016-12-06 11:21 ` Peter Zijlstra
2016-12-02 21:19 ` [PATCH V2 03/13] perf/x86: output sampling overhead kan.liang
2016-12-06 11:20 ` Peter Zijlstra
2016-12-06 15:02 ` Liang, Kan
2016-12-06 15:32 ` Peter Zijlstra
2016-12-06 15:47 ` Liang, Kan
2016-12-06 18:26 ` Peter Zijlstra
2016-12-07 19:03 ` Liang, Kan
2016-12-06 11:38 ` Peter Zijlstra
2016-12-02 21:19 ` [PATCH V2 04/13] perf/core: output multiplexing overhead kan.liang
2016-12-06 11:23 ` Peter Zijlstra
2016-12-06 15:04 ` Liang, Kan
2016-12-02 21:19 ` [PATCH V2 05/13] perf/core: output side-band events overhead kan.liang
2016-12-06 11:25 ` Peter Zijlstra
2016-12-02 21:19 ` [PATCH V2 06/13] perf tools: option to disable overhead collection kan.liang
2016-12-02 21:19 ` [PATCH V2 07/13] perf tools: handle PERF_RECORD_OVERHEAD record type kan.liang
2016-12-06 11:16 ` Jiri Olsa
2016-12-02 21:19 ` [PATCH V2 08/13] perf tools: show kernel overhead kan.liang
2016-12-06 11:16 ` Jiri Olsa
2016-12-06 11:16 ` Jiri Olsa
2016-12-06 11:16 ` Jiri Olsa
2016-12-02 21:19 ` [PATCH V2 09/13] perf script: " kan.liang
2016-12-04 21:25 ` Jiri Olsa [this message]
2016-12-05 14:47 ` Liang, Kan
2016-12-02 21:19 ` [PATCH V2 10/13] perf tools: add time related functions kan.liang
2016-12-06 11:16 ` Jiri Olsa
2016-12-02 21:19 ` [PATCH V2 11/13] perf tools: introduce PERF_RECORD_USER_OVERHEAD kan.liang
2016-12-02 21:19 ` [PATCH V2 12/13] perf tools: record user space profiling cost kan.liang
2016-12-02 21:19 ` [PATCH V2 13/13] perf report: warn on high overhead kan.liang
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