From: David Ahern <dsahern@gmail.com>
To: William Cohen <wcohen@redhat.com>, Carl Love <cel@us.ibm.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: Sat, 10 Jan 2015 08:14:58 -0700 [thread overview]
Message-ID: <54B141F2.60104@gmail.com> (raw)
In-Reply-To: <54B0A757.2010407@redhat.com>
On 1/9/15 9:15 PM, William Cohen wrote:
>> I have thought about pipes, callbacks, but I don't see any way to get
>> these to work between the library loaded in the Java program and perf.
>> Just wondering if you had any thoughts on how to do the communication?
>>
>> Carl Love
>
> Hi Carl,
>
> Too bad there isn't a "sys_perf_event" syscall to allow user-space applications to inject like a software event style entries into the kernel's recording of perf events. The AMD lightweight profiling mechanism specified the LWPINS instruction to insert a software event entry into the data buffer (http://support.amd.com/TechDocs/43724.pdf). Seems like the linux kernel should have a similar mechanism to allow user and kernel-space to inject data in the perf records.
>
> -Will
https://lkml.org/lkml/2014/11/3/917
David
next prev parent reply other threads:[~2015-01-10 15:15 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 [this message]
2015-01-12 17:22 ` Carl Love
2015-01-12 17:58 ` David Ahern
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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