[lkml]   [2004]   [Mar]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: 2.4.23aa2 (bugfixes and important VM improvements for the high end)
> On Fri, Feb 27, 2004 at 10:10:22PM -0800, Martin J. Bligh wrote:
>> Why is it 2.7GB with both 3:1 and 4:4 ... surely it can get bigger on
>> 4:4 ???
> You could use 3.7 on 4:4, but what's the point if you throw away the
> mapping constantly by flushing the TLB?

Normally, a bigger shm segment = higher performance. Throwing the TLB
away means lower performance. Depending on the workload, the tradeoff
could work out either way ... the only thing I've seen so far from
someone who has measured it was hints that 4/4 was faster in some
situations ... we're trying to do some more runs to confirm / deny that.
Hopefully others will do the same ;-)


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 14:01    [W:0.090 / U:28.356 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site