From: Michael Ellerman <michael@ellerman.id.au>
To: Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org, acme@ghostprotocols.net,
mingo@redhat.com, Paul Mackerras <paulus@samba.org>,
Anton Blanchard <anton@samba.org>
Subject: Re: [PATCH] perf tools: Add support for pinned modifier
Date: Thu, 25 Jul 2013 22:53:26 +1000 [thread overview]
Message-ID: <1374756806.12885.14.camel@concordia> (raw)
In-Reply-To: <20130725110447.GS27075@twins.programming.kicks-ass.net>
On Thu, 2013-07-25 at 13:04 +0200, Peter Zijlstra wrote:
> On Wed, Jul 24, 2013 at 12:26:42PM +1000, Michael Ellerman wrote:
> >
> > I would have used "p" obviously, but that's taken. Are folks happy that
> > "P" is sufficiently different from "p"? I couldn't think of anything
> > better.
>
> I've seen proposals where 'P' is used for the max 'p' level :/
Hmm, OK.
So 'p' is for precise, which maps onto a 2 bit field in
perf_event_attr.precise_ip.
No 'p' modifier means precise_ip = 0, so the max value of 3 would be
'ppp' right?
We don't use 'p' so I have no idea how often it's used and whether
typing 'ppp' is going to be a major pain for people.
> But yes, vexing situation.
Quite. Nothing jumps out as an obvious alternative, including any of the
symbols.
So how about 'D'.
Because it makes a smiley face:
$ perf stat -e cycles:D
And having perf smile at you can't be a bad thing.
cheers
prev parent reply other threads:[~2013-07-25 12:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-24 2:26 Michael Ellerman
2013-07-25 11:04 ` Peter Zijlstra
2013-07-25 12:53 ` Michael Ellerman [this message]
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=1374756806.12885.14.camel@concordia \
--to=michael@ellerman.id.au \
--cc=acme@ghostprotocols.net \
--cc=anton@samba.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=paulus@samba.org \
--cc=peterz@infradead.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
all inboxes | Powered by JetHome®