From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>,
Linux PPC <linuxppc-dev@lists.ozlabs.org>,
LKML <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@redhat.com>, Paul Mackerras <paulus@samba.org>,
Arnaldo Carvalho de Melo <acme@ghostprotocols.net>,
Cody P Schafer <cody@linux.vnet.ibm.com>
Subject: Re: [PATCH 0/8] Add support for PowerPC Hypervisor supplied performance counters
Date: Wed, 22 Jan 2014 15:07:15 +0530 [thread overview]
Message-ID: <52DF914B.2060308@linux.vnet.ibm.com> (raw)
In-Reply-To: <1390354379.11104.3.camel@concordia>
On 01/22/2014 07:02 AM, Michael Ellerman wrote:
> On Thu, 2014-01-16 at 15:53 -0800, Cody P Schafer wrote:
>> These patches add basic pmus for 2 powerpc hypervisor interfaces to obtain
>> performance counters: gpci ("get performance counter info") and 24x7.
>>
>> The counters supplied by these interfaces are continually counting and never
>> need to be (and cannot be) disabled or enabled. They additionally do not
>> generate any interrupts. This makes them in some regards similar to software
>> counters, and as a result their implimentation shares some common code (which
>> an initial patch exposes) with the sw counters.
>
> Hi Cody,
>
> Can you please add some more explanation of this series.
>
> In particular why do we need two new PMUs, and how do they relate to each
> other?
>
> And can you add an example of how I'd actually use them using perf.
>
Yeah, agreed.
next prev parent reply other threads:[~2014-01-22 9:38 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-16 23:53 [PATCH 0/8] Add support for PowerPC Hypervisor supplied performance counters Cody P Schafer
2014-01-16 23:53 ` [PATCH 1/8] perf: add PMU_RANGE_ATTR() helper for use by sw-like pmus Cody P Schafer
2014-02-01 5:58 ` Michael Ellerman
2014-02-03 21:19 ` Cody P Schafer
2014-01-16 23:53 ` [PATCH 2/8] perf core: export swevent hrtimer helpers Cody P Schafer
2014-02-01 5:58 ` Michael Ellerman
2014-01-16 23:53 ` [PATCH 3/8] powerpc: add hvcalls for 24x7 and gpci (get performance counter info) Cody P Schafer
2014-02-01 5:58 ` Michael Ellerman
2014-02-03 21:21 ` Cody P Schafer
2014-01-16 23:53 ` [PATCH 4/8] powerpc: add hv_gpci interface header Cody P Schafer
2014-02-01 5:58 ` Michael Ellerman
2014-02-03 21:40 ` Cody P Schafer
2014-02-05 23:14 ` Cody P Schafer
2014-01-16 23:53 ` [PATCH 5/8] powerpc: add 24x7 " Cody P Schafer
2014-02-01 5:58 ` Michael Ellerman
2014-01-16 23:53 ` [PATCH 6/8] powerpc/perf: add support for the hv gpci (get performance counter info) interface Cody P Schafer
2014-02-01 5:58 ` Michael Ellerman
2014-02-03 21:13 ` Cody P Schafer
2014-01-16 23:53 ` [PATCH 7/8] powerpc/perf: add support for the hv 24x7 interface Cody P Schafer
2014-01-16 23:53 ` [PATCH 8/8] powerpc/perf: add kconfig option for hypervisor provided counters Cody P Schafer
2014-01-22 1:32 ` [PATCH 0/8] Add support for PowerPC Hypervisor supplied performance counters Michael Ellerman
2014-01-22 9:37 ` Anshuman Khandual [this message]
2014-01-23 0:11 ` Cody P Schafer
2014-01-31 20:59 ` Cody P Schafer
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=52DF914B.2060308@linux.vnet.ibm.com \
--to=khandual@linux.vnet.ibm.com \
--cc=a.p.zijlstra@chello.nl \
--cc=acme@ghostprotocols.net \
--cc=cody@linux.vnet.ibm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=mingo@redhat.com \
--cc=mpe@ellerman.id.au \
--cc=paulus@samba.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).