From: Carl Love <cel@us.ibm.com>
To: David Ahern <dsahern@gmail.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 09:22:48 -0800 [thread overview]
Message-ID: <1421083368.6211.2.camel@oc0276584878.ibm.com> (raw)
In-Reply-To: <54B141F2.60104@gmail.com>
On Sat, 2015-01-10 at 08:14 -0700, David Ahern wrote:
> 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
>
David:
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.
Carl Love
next prev parent reply other threads:[~2015-01-12 17:22 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 [this message]
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1421083368.6211.2.camel@oc0276584878.ibm.com \
--to=cel@us.ibm.com \
--cc=acme@kernel.org \
--cc=dsahern@gmail.com \
--cc=linux-perf-users@vger.kernel.org \
--cc=wcohen@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).