From: David Ahern <dsahern@gmail.com>
To: Carl Love <cel@us.ibm.com>
Cc: William Cohen <wcohen@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
"linux-perf-use." <linux-perf-users@vger.kernel.org>
Subject: Re: Perf support for interpreted and Just-In-Time translated olanguages
Date: Mon, 12 Jan 2015 10:58:41 -0700 [thread overview]
Message-ID: <54B40B51.5080107@gmail.com> (raw)
In-Reply-To: <1421083368.6211.2.camel@oc0276584878.ibm.com>
On 1/12/15 10:22 AM, Carl Love wrote:
> Ah, this is the ioctl patch you had mentioned you mentioned previously.
> I hadn't found the patch before. Yes, this looks like it would work. I
> will see if I can get a prototype working with this patch. Thanks.
>
If you need to shove samples into perf (versus mmap updates) I suspect
the prctl system call will have way to much overhead. In that case
perhaps processes could export a shared memory buffer that a perf
session could attach -- another aux buffer similar to what itrace needs.
But then that brings in the perf_clock issue; samples would need to have
the same time basis as kernel generated samples.
David
next prev parent reply other threads:[~2015-01-12 17:58 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-05 20:18 Perf support for interpreted and Just-In-Time translated languages Carl Love
2014-12-05 21:27 ` Brendan Gregg
2014-12-09 20:34 ` Arnaldo Carvalho de Melo
2014-12-09 22:01 ` Andi Kleen
2014-12-09 22:22 ` Perf support for interpreted and Just-In-Time translated olanguages Arnaldo Carvalho de Melo
2014-12-10 0:38 ` Andi Kleen
2014-12-10 17:41 ` Carl Love
2014-12-10 18:09 ` Andi Kleen
2014-12-10 19:21 ` Arnaldo Carvalho de Melo
2014-12-10 19:19 ` Arnaldo Carvalho de Melo
2014-12-10 17:32 ` Andi Kleen
2014-12-10 17:39 ` David Ahern
2014-12-10 18:05 ` Andi Kleen
2014-12-10 18:27 ` David Ahern
2014-12-10 19:43 ` Arnaldo Carvalho de Melo
2015-01-09 20:19 ` Carl Love
2015-01-10 4:15 ` William Cohen
2015-01-10 15:14 ` David Ahern
2015-01-12 17:22 ` Carl Love
2015-01-12 17:58 ` David Ahern [this message]
2015-01-12 18:43 ` Carl Love
2015-01-20 18:19 ` Carl Love
2015-01-20 19:29 ` Arnaldo Carvalho de Melo
2015-01-20 20:34 ` Carl Love
2015-01-20 20:52 ` Arnaldo Carvalho de Melo
2015-01-23 8:25 ` Sujoy Saraswati
2014-12-10 7:55 ` Perf support for interpreted and Just-In-Time translated languages Pekka Enberg
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