From: Will Deacon <will.deacon@arm.com>
To: Ingo Molnar <mingo@kernel.org>
Cc: David Ahern <david.ahern@oracle.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Mark Rutland <Mark.Rutland@arm.com>,
"jolsa@kernel.org" <jolsa@kernel.org>,
"namhyung@kernel.org" <namhyung@kernel.org>,
"acme@redhat.com" <acme@redhat.com>
Subject: Re: arm/arm64 perf build issue with mainline
Date: Mon, 11 May 2015 13:31:18 +0100 [thread overview]
Message-ID: <20150511123117.GD4795@arm.com> (raw)
In-Reply-To: <20150511082120.GA13145@gmail.com>
On Mon, May 11, 2015 at 09:21:20AM +0100, Ingo Molnar wrote:
> * David Ahern <david.ahern@oracle.com> wrote:
> > On 4/23/15 5:29 AM, Will Deacon wrote:
> > >Commit 6428c59a97de ("perf tools: Set JOBS based on CPU or processor")
> > >causes weird behaviour on arm/arm64 platforms because we use the "CPU"
> > >prefix for things like:
> > >
> > >CPU implementer : 0x41
> > >CPU architecture: 8
> > >CPU variant : 0x0
> > >CPU part : 0xd03
> > >CPU revision : 0
> > >
> > >in /proc/cpuinfo. Consequently, a 6 core machine ends up doing:
> > >
> > >will@confinement-loaf:~/linux/tools/perf$ make
> > > BUILD: Doing 'make -j36' parallel build
> > >
> > >which is a little overwhelming. Any chance we can predicate the extra
> > >part of the regex on $(ARCH) being sparc?
>
> That regex needs to be fixed or replaced with a more robust 'number of
> CPUs on the system' discovery method.
That was already proposed here (as part of the fallback from getconf):
https://lkml.kernel.org/r/20150427190356.GD474@krava.redhat.com
but I'm not sure what happened to the patch.
Will
next prev parent reply other threads:[~2015-05-11 12:31 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-23 11:29 arm/arm64 perf build issue with mainline Will Deacon
2015-04-23 14:04 ` Will Deacon
2015-04-23 14:16 ` David Ahern
2015-04-24 16:10 ` Arnaldo Carvalho de Melo
2015-04-24 16:22 ` Will Deacon
2015-04-24 17:21 ` David Ahern
2015-04-27 16:26 ` Arnaldo Carvalho de Melo
2015-04-27 17:13 ` David Ahern
2015-04-27 17:40 ` Arnaldo Carvalho de Melo
2015-04-27 17:49 ` Jiri Olsa
2015-04-27 18:39 ` Arnaldo Carvalho de Melo
2015-04-27 18:41 ` Jiri Olsa
2015-04-27 18:45 ` Arnaldo Carvalho de Melo
2015-04-27 18:52 ` Jiri Olsa
2015-04-27 19:00 ` Arnaldo Carvalho de Melo
2015-04-27 19:03 ` Jiri Olsa
2015-05-06 3:09 ` [tip:perf/core] perf tools: Use getconf to determine number of online CPUs tip-bot for Will Deacon
2015-05-13 6:24 ` [tip:perf/urgent] " tip-bot for Will Deacon
2015-04-23 14:29 ` arm/arm64 perf build issue with mainline David Ahern
2015-05-11 8:21 ` Ingo Molnar
2015-05-11 12:31 ` Will Deacon [this message]
2015-05-11 12:33 ` Ingo Molnar
2015-05-11 15:58 ` acme
2015-05-11 15:59 ` acme
2015-05-11 17:29 ` Will Deacon
2015-05-11 19:01 ` Arnaldo Carvalho de Melo
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