From: Avi Kivity <avi@redhat.com>
To: Takuya Yoshikawa <takuya.yoshikawa@gmail.com>
Cc: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>,
mtosatti@redhat.com, kvm@vger.kernel.org
Subject: Re: [PATCH 3/3] KVM: MMU: Separate trivial NULL check out from rmap_get_next()
Date: Thu, 15 Mar 2012 15:46:31 +0200 [thread overview]
Message-ID: <4F61F2B7.1020202@redhat.com> (raw)
In-Reply-To: <20120315224142.67713f557239116a99cd18af@gmail.com>
On 03/15/2012 03:41 PM, Takuya Yoshikawa wrote:
> > What I mean is, modern cpus effectively inline simple function calls by
> > predicting the call, and branchs within the function, and the return, so
> > they don't have to stop their pipelines at any of these points. But
> > again, the numbers talk louder than speculation about cpu architecture.
>
> I need to update my knowledge, thank you!
>
>
You can look at what's happening by doing
perf record -a -f
perf report
using the TUI, select 'annotate rmap_get_next'
You should see where the time is spent.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2012-03-15 13:46 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-15 9:18 [PATCH 0/3] KVM: MMU: Improve rmap handling Takuya Yoshikawa
2012-03-15 9:19 ` [PATCH 1/3] KVM: MMU: Make pte_list_desc fit cache lines well Takuya Yoshikawa
2012-03-15 9:22 ` Avi Kivity
2012-03-15 9:20 ` [PATCH 2/3] KVM: MMU: Improve iteration over sptes linked by rmap Takuya Yoshikawa
2012-03-15 9:44 ` Avi Kivity
2012-03-15 10:25 ` Takuya Yoshikawa
2012-03-15 9:21 ` [PATCH 3/3] KVM: MMU: Separate trivial NULL check out from rmap_get_next() Takuya Yoshikawa
2012-03-15 9:49 ` Avi Kivity
2012-03-15 10:15 ` Takuya Yoshikawa
2012-03-15 12:01 ` Avi Kivity
2012-03-15 13:41 ` Takuya Yoshikawa
2012-03-15 13:45 ` Avi Kivity
2012-03-15 13:46 ` Avi Kivity [this message]
2012-03-20 6:37 ` Takuya Yoshikawa
2012-03-20 11:56 ` Avi Kivity
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=4F61F2B7.1020202@redhat.com \
--to=avi@redhat.com \
--cc=kvm@vger.kernel.org \
--cc=mtosatti@redhat.com \
--cc=takuya.yoshikawa@gmail.com \
--cc=yoshikawa.takuya@oss.ntt.co.jp \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.