From: Ingo Molnar <mingo@elte.hu>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Paul Mackerras <paulus@samba.org>,
Prasad <prasad@linux.vnet.ibm.com>
Subject: Re: [PATCH 4/4] perf tools: Add support for breakpoint events in perf tools
Date: Mon, 23 Nov 2009 18:38:17 +0100 [thread overview]
Message-ID: <20091123173817.GA23765@elte.hu> (raw)
In-Reply-To: <1258987355-8751-4-git-send-email-fweisbec@gmail.com>
* Frederic Weisbecker <fweisbec@gmail.com> wrote:
> Add the breakpoint events support with this new sysnopsis:
>
> mem:addr[:access]
>
> Where addr is a raw addr value in the kernel and access can be
> either [r][w][x]
>
> Example to profile tasklist_lock:
>
> $ grep tasklist_lock /proc/kallsyms
> ffffffff8189c000 D tasklist_lock
>
> $ perf record -e mem:0xffffffff8189c000:rw -a -f -c 1
would be nice to also accept a plain cut & paste of an address in hexa
without the 0x prefix, i.e.:
$ perf record -e mem:ffffffff8189c000:rw -a -f -c 1
plus perf stat gets surprised by this new event and prints 'unknown':
$ grep tasklist_lock /proc/kallsyms
ffffffff81802000 D tasklist_lock
$ perf stat -a -e mem:0xffffffff81802000 sleep 1
Performance counter stats for 'sleep 1':
64 unknown
1.000833173 seconds time elapsed
Ingo
next prev parent reply other threads:[~2009-11-23 17:38 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-23 14:42 [PATCH 1/4] hw-breakpoints: Include only linux/perf_event.h from kernel part of bp headers Frederic Weisbecker
2009-11-23 14:42 ` [PATCH 2/4] hw-breakpoints: Check the breakpoint params from perf tools Frederic Weisbecker
2009-11-23 17:43 ` [tip:perf/core] " tip-bot for Frederic Weisbecker
2009-11-23 14:42 ` [PATCH 3/4] perf: Add kernel side syscall events support for breakpoints Frederic Weisbecker
2009-11-23 17:43 ` [tip:perf/core] " tip-bot for Frederic Weisbecker
2009-11-23 14:42 ` [PATCH 4/4] perf tools: Add support for breakpoint events in perf tools Frederic Weisbecker
2009-11-23 17:36 ` K.Prasad
2009-11-23 20:25 ` Frederic Weisbecker
2009-11-23 21:09 ` Arnaldo Carvalho de Melo
2009-11-23 21:19 ` Frederic Weisbecker
2009-11-23 21:25 ` Ingo Molnar
2009-11-23 21:25 ` Arnaldo Carvalho de Melo
2009-11-23 17:38 ` Ingo Molnar [this message]
2009-11-23 17:44 ` [tip:perf/core] " tip-bot for Frederic Weisbecker
2009-11-23 17:43 ` [tip:perf/core] hw-breakpoints: Include only linux/perf_event.h from kernel part of bp headers tip-bot for Frederic Weisbecker
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