From: "tiejun.chen" <tiejun.chen@windriver.com>
To: nitesh narayan lal <niteshnarayanlalleo@gmail.com>
Cc: <kvm@vger.kernel.org>,
"kvm-ppc@vger.kernel.org" <kvm-ppc@vger.kernel.org>
Subject: Re: Performance Analysis - EMUL_MTSPR: Increased counts
Date: Tue, 14 May 2013 18:27:39 +0800 [thread overview]
Message-ID: <5192119B.20705@windriver.com> (raw)
In-Reply-To: <CAAtA1-a-DoYGc-nie+78ChY3Qs2-1+bH=N6QkPJx90WDtqCpVw@mail.gmail.com>
On 05/13/2013 04:32 PM, nitesh narayan lal wrote:
> Hi,
> I am doing the virtio performance analysis on PowerPC,with the updated
> QEMU I had observed that the EMUL_MTSPR instruction counts in KVM Exit
Sounds you are saying this behaviour is only reproduced after you update QEMU.
If so, you can use 'git bisect' easily to figure out this issued commit.
> count is going really high when I send packets from Guest with respect
> to without sending network packets from Guest.
> I had added few prints and found that special register number 336
> which corresponds to TSR:Timer Status is been called number of times
Which platform? Which CPU core?
> which I think could result in a higher CPU Utilization.
How many processes else are running except for KVM guest?
Tiejun
> I would be thankful if I could get some opinions about this observation.
> Regards
> Nitesh Narayan Lal
> --
> To unsubscribe from this list: send the line "unsubscribe kvm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
>
next prev parent reply other threads:[~2013-05-14 10:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-13 8:32 Performance Analysis - EMUL_MTSPR: Increased counts nitesh narayan lal
2013-05-14 10:27 ` tiejun.chen [this message]
2013-05-15 4:15 ` nitesh narayan lal
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=5192119B.20705@windriver.com \
--to=tiejun.chen@windriver.com \
--cc=kvm-ppc@vger.kernel.org \
--cc=kvm@vger.kernel.org \
--cc=niteshnarayanlalleo@gmail.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