Messages in this thread | | | Date | Mon, 11 May 2015 13:31:18 +0100 | From | Will Deacon <> | Subject | Re: arm/arm64 perf build issue with mainline |
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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
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