On Sat, 2006-03-25 at 21:38 -0800, dean gaudet wrote:
On Sat, 25 Mar 2006, Alex Izvorski wrote:
http://linuxraid.pastebin.com/621363 - oprofile annotated assembly
it looks to me like a lot of time is spent in __find_stripe() ... i wonder
if the hash is working properly.
in raid5.c
On Sat, 1 Apr 2006, Alex Izvorski wrote:
Dean - I think I see what you mean, you're looking at this line in the
assembly?
65830 16.8830 : c1f: cmp%rcx,0x28(%rax)
yup that's the one... that's probably a fair number of cache (or tlb)
misses going on right there.
I looked at
Hello,
I profiled some raid5 reads using oprofile to try to track down the
suspiciously high cpu load I see. This uses the same 8-disk SATA setup
as I had described earlier. One of runs is on a 1MB chunk raid5, the
other on a 32MB chunk raid5. As Neil suggested memcpy is a big part of
the cpu
