From: Andi Kleen <andi@firstfloor.org>
To: Harald Servat <harald.servat@bsc.es>
Cc: Andi Kleen <andi@firstfloor.org>, linux-perf-users@vger.kernel.org
Subject: Re: Information regarding the perf tool
Date: Thu, 31 Oct 2013 17:48:01 +0100 [thread overview]
Message-ID: <20131031164801.GY29695@two.firstfloor.org> (raw)
In-Reply-To: <52727B0C.5040402@bsc.es>
> In fact, I expected that for each entry into the PEBS a handler
> would be executed, but Intel documentations points that to use PEBS
> the tool (here perf) needs to allocate space for multiple PEBS
> entries, so the when the handler is invoked there may be multiple
> entries in the buffer, which makes things a little more obscure.
perf always uses threshold 1 for the PEBS buffer.
But yes there is some delay until the handler executes, and the
time stamp is only computed in the handler.
-Andi
next prev parent reply other threads:[~2013-10-31 16:48 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-22 16:19 Information regarding the perf tool Harald Servat
2013-10-23 12:47 ` Andi Kleen
2013-10-23 13:51 ` Harald Servat
2013-10-31 15:45 ` Harald Servat
2013-10-31 16:39 ` David Ahern
2013-10-31 17:23 ` Harald Servat
2013-10-31 18:22 ` David Ahern
2013-11-04 17:26 ` Harald Servat
2013-11-04 17:53 ` David Ahern
2013-11-04 18:02 ` Pawel Moll
2013-12-12 0:56 ` David Ahern
2013-12-12 8:47 ` Harald Servat
2014-01-09 12:11 ` Harald Servat
2013-10-31 16:48 ` Andi Kleen [this message]
2013-10-31 16:57 ` Harald Servat
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=20131031164801.GY29695@two.firstfloor.org \
--to=andi@firstfloor.org \
--cc=harald.servat@bsc.es \
--cc=linux-perf-users@vger.kernel.org \
/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).