From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: Athira Rajeev <atrajeev@linux.vnet.ibm.com>, mpe@ellerman.id.au
Cc: maddy@linux.ibm.com, linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH V2] powerpc/perf: Exclude kernel samples while counting events in user space.
Date: Tue, 15 Dec 2020 21:48:54 +1100 (AEDT) [thread overview]
Message-ID: <160802921142.504444.13858621470495661057.b4-ty@ellerman.id.au> (raw)
In-Reply-To: <1606289215-1433-1-git-send-email-atrajeev@linux.vnet.ibm.com>
On Wed, 25 Nov 2020 02:26:55 -0500, Athira Rajeev wrote:
> Perf event attritube supports exclude_kernel flag
> to avoid sampling/profiling in supervisor state (kernel).
> Based on this event attr flag, Monitor Mode Control Register
> bit is set to freeze on supervisor state. But sometime (due
> to hardware limitation), Sampled Instruction Address
> Register (SIAR) locks on to kernel address even when
> freeze on supervisor is set. Patch here adds a check to
> drop those samples.
Applied to powerpc/next.
[1/1] powerpc/perf: Exclude kernel samples while counting events in user space.
https://git.kernel.org/powerpc/c/aa8e21c053d72b6639ea5a7f1d3a1d0209534c94
cheers
prev parent reply other threads:[~2020-12-15 10:53 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-25 7:26 [PATCH V2] powerpc/perf: Exclude kernel samples while counting events in user space Athira Rajeev
2020-12-15 10:48 ` 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=160802921142.504444.13858621470495661057.b4-ty@ellerman.id.au \
--to=patch-notifications@ellerman.id.au \
--cc=atrajeev@linux.vnet.ibm.com \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=maddy@linux.ibm.com \
--cc=mpe@ellerman.id.au \
/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.