From: Peter Zijlstra <peterz@infradead.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Andy Lutomirski <luto@amacapital.net>,
Vince Weaver <vincent.weaver@maine.edu>,
Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@linux.intel.com>,
linux-kernel@vger.kernel.org, Jiri Olsa <jolsa@redhat.com>,
Stephane Eranian <eranian@google.com>,
Borislav Petkov <bp@suse.de>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Andi Kleen <ak@linux.intel.com>
Subject: Re: [RFC PATCH] perf: Provide status of known PMUs
Date: Thu, 9 Jul 2015 13:59:48 +0200 [thread overview]
Message-ID: <20150709115948.GS19282@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <20150709092656.GA13336@gmail.com>
On Thu, Jul 09, 2015 at 11:26:56AM +0200, Ingo Molnar wrote:
>
> * Peter Zijlstra <peterz@infradead.org> wrote:
>
> > On Thu, Jul 09, 2015 at 10:48:00AM +0300, Adrian Hunter wrote:
> >
> > > Known PMUs may not be present for various reasons. Provide a way for the user
> > > to know what the reason is.
> >
> > Not a bad idea, but I do wonder where we should draw the line on what is
> > 'known'. The patch as proposed will have bts/pt listed as 'known' for every arch
> > out there.
> >
> > By that logic, x86 should list the ppc/sparc/mips/arm/etc.. PMUs as known and
> > wrong_arch too, which might be a tad excessive.
>
> Absolutely x86 should list them as well - from a user POV arch dependent tooling
> sucks in general. There's nothing more annoying than trying to figure out why a
> particular tool does not work.
But why would the tool care?
next prev parent reply other threads:[~2015-07-09 11:59 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-09 7:48 [RFC PATCH] perf: Provide status of known PMUs Adrian Hunter
2015-07-09 8:10 ` Ingo Molnar
2015-07-09 8:44 ` Adrian Hunter
2015-07-09 8:50 ` Peter Zijlstra
2015-07-09 9:26 ` Ingo Molnar
2015-07-09 11:59 ` Peter Zijlstra [this message]
2015-07-09 12:32 ` Ingo Molnar
2015-07-09 12:42 ` Peter Zijlstra
2015-07-09 14:47 ` Arnaldo Carvalho de Melo
2015-07-10 8:35 ` Ingo Molnar
2015-07-10 18:59 ` Stephane Eranian
2015-07-09 9:30 ` Adrian Hunter
2015-07-09 11:44 ` Peter Zijlstra
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=20150709115948.GS19282@twins.programming.kicks-ass.net \
--to=peterz@infradead.org \
--cc=acme@kernel.org \
--cc=adrian.hunter@intel.com \
--cc=ak@linux.intel.com \
--cc=alexander.shishkin@linux.intel.com \
--cc=bp@suse.de \
--cc=eranian@google.com \
--cc=hpa@linux.intel.com \
--cc=jolsa@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=luto@amacapital.net \
--cc=mingo@kernel.org \
--cc=tglx@linutronix.de \
--cc=vincent.weaver@maine.edu \
/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.