Re: arm/arm64 perf build issue with mainline

[Will Deacon]

On Thu, Apr 23, 2015 at 12:29:16PM +0100, Will Deacon wrote:
> Hi all,
> 
> 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?

Scratch that, how about using sysconf instead? Patch below...

Will

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