From: Peter Zijlstra <peterz@infradead.org>
To: Stephane Eranian <eranian@google.com>
Cc: linux-kernel@vger.kernel.org, acme@redhat.com, mingo@elte.hu,
ak@linux.intel.com, jolsa@redhat.com, namhyung@kernel.org,
cel@us.ibm.com, sukadev@linux.vnet.ibm.com,
sonnyrao@chromium.org, johnmccutchan@google.com
Subject: Re: [PATCH 0/4] perf: add support for profiling jitted code
Date: Wed, 11 Feb 2015 12:39:46 +0100 [thread overview]
Message-ID: <20150211113946.GT23123@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <1423611765-18200-1-git-send-email-eranian@google.com>
On Wed, Feb 11, 2015 at 12:42:41AM +0100, Stephane Eranian wrote:
> To enable synchronization of the runtime MMAPs with those recorded by
> the kernel on behalf of the perf tool, the runtime needs to timestamp
> any record in the dump file using the same time source. The current
> patch series is relying on Sonny Rao's posix-clock patch series
> posted on LKML in 2013. The link to the patches is:
> https://lkml.org/lkml/2013/12/6/1044
>
At least for x86 you could use something like this:
lkml.kernel.org/r/aa2dd2e4f1e9f2225758be5ba00f14d6909a8ce1.1423180257.git.shli@fb.com
We can re-create the perf_clock() from the tsc with the mult, shift and
offset provided in the perf userpage.
next prev parent reply other threads:[~2015-02-11 11:40 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-10 23:42 Stephane Eranian
2015-02-10 23:42 ` [PATCH 1/4] perf tools: add Java demangling support Stephane Eranian
2015-02-12 8:12 ` Namhyung Kim
2015-02-12 11:27 ` Jiri Olsa
2015-02-10 23:42 ` [PATCH 2/4] perf tools: pass timestamp to map_init Stephane Eranian
2015-02-16 6:55 ` Adrian Hunter
2015-02-10 23:42 ` [PATCH 3/4] perf inject: add jitdump mmap injection support Stephane Eranian
2015-02-11 11:59 ` Peter Zijlstra
2015-02-11 13:13 ` Stephane Eranian
2015-02-11 15:27 ` David Ahern
2015-02-12 8:19 ` Namhyung Kim
2015-02-10 23:42 ` [PATCH 4/4] perf tools: add JVMTI agent library Stephane Eranian
2015-02-12 8:21 ` Namhyung Kim
2015-02-12 13:25 ` Jiri Olsa
2015-02-12 16:09 ` Stephane Eranian
2015-02-12 16:58 ` Andi Kleen
2015-02-12 17:11 ` Stephane Eranian
2015-02-16 7:01 ` Adrian Hunter
2015-02-16 20:22 ` Stephane Eranian
2015-02-18 8:43 ` Adrian Hunter
2015-02-11 11:39 ` Peter Zijlstra [this message]
2015-02-11 13:18 ` [PATCH 0/4] perf: add support for profiling jitted code Stephane Eranian
2015-02-11 16:15 ` Peter Zijlstra
2015-02-11 16:25 ` David Ahern
2015-02-12 13:42 ` Jiri Olsa
2015-02-12 17:27 ` Stephane Eranian
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