Subject: Re: [MM PATCH V4.1 5/6] slub: support for bulk free with SLUB freelists

From: Andi Kleen <[email-masked]>
Date: Wed, 7 Oct 2015 09:06:52 -0700

> My specific CPU (i7-4790K @ 4.00GHz) unfortunately seems to have
> limited "Frontend" support. E.g. 
> 
>  # perf record -g -a -e stalled-cycles-frontend
>  Error:
>  The stalled-cycles-frontend event is not supported.
> 
> And AFAIK icache misses are part of "frontend".

Ignore stalled-cycles-frontend. It is very unreliable and has never worked right.
toplev gives you much more reliable output.

-Andi

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