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Date: Sun, 11 Apr 2010 12:49:00 +0200
From: Ingo Molnar <mingo@elte.hu>
Subject: Re: [PATCH 00 of 41] Transparent Hugepage Support #17
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* Ingo Molnar <mingo@elte.hu> wrote:

> > Desktops will only benefit when they bloat to ~8GB RAM and 1-2GB firefox 
> > RSS, probably not so far in the future.
> 
> 1-2GB firefox RSS is reality for me.
> 
> Btw., there's another workload that could be cache sensitive, 'git grep':
> 
>  aldebaran:~/linux> perf stat -e cycles -e instructions -e dtlb-loads -e dtlb-load-misses --repeat 5 git grep arca >/dev/null
> 
>  Performance counter stats for 'git grep arca' (5 runs):
> 
>      1882712774  cycles                     ( +-   0.074% )
>      1153649442  instructions             #      0.613 IPC     ( +-   0.005% )
>       518815167  dTLB-loads                 ( +-   0.035% )
>         3028951  dTLB-load-misses           ( +-   1.223% )
> 
>     0.597161428  seconds time elapsed   ( +-   0.065% )

Sidenote: you might want to try the cool new threaded git grep from upstream 
Git project:

 git clone git://git.kernel.org/pub/scm/git/git.git
 cd git
 make -j

Beyond being faster, it will also probably show a bigger hugetlb speedup, as 
the effective per core (and per hyperthread) cache set is smaller than for a 
single-threaded git grep.

	Ingo

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