27 Nov
2007
27 Nov
'07
5:28 a.m.
On Tue, Nov 27, 2007 at 05:17:04AM -0800, Howard Chu wrote:
The -O2 build is faster from about 4 to 24 client threads. From 28 on up, the nonoptimized code is faster at every load level. I was originally using gcc 4.1.2 but I'm seeing the same result now using gcc 4.2.2. Also, slapd is only configured with 8 worker threads in all of these tests. Strange that whatever optimizations the compiler has generated speeds things up for lighter load, but works against it under heavier load.
1stlevel instruction cache thrashing due to function inlining?
Volker