linux-kernel - Re: [RFC] perf: fix building for ARCv1

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Date:	Sun, 18 Oct 2015 22:49:53 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	Vineet Gupta <Vineet.Gupta1@...opsys.com>
Cc:	Alexey Brodkin <Alexey.Brodkin@...opsys.com>,
	Aabid Rushdi <Aabid.Rushdi@...opsys.com>,
	"linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
	"peterz\@infradead.org" <peterz@...radead.org>,
	"linux-perf-users\@vger.kernel.org" 
	<linux-perf-users@...r.kernel.org>,
	"dvhart\@linux.intel.com" <dvhart@...ux.intel.com>,
	"dsahern\@gmail.com" <dsahern@...il.com>,
	"acme\@redhat.com" <acme@...hat.com>
Subject: Re: [RFC] perf: fix building for ARCv1

Vineet Gupta <Vineet.Gupta1@...opsys.com> writes:
>
> But this user space - so IMHO UP/SMP doesn't matter and we can't simulate them in
> C just by itself.

It matters when you access the perf ring buffer which is updated by kernel.
Also perf is now multi threaded to some degree.

-Andi
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