On 2016-10-24 09:20, Arnaldo Carvalho de Melo wrote:
From: Sebastian Andrzej Siewior <bige...@linutronix.de>
It popped up in perf testing that the worker consumes some amount of
CPU. It boils down to the increment of `ops` which causes cache line
bouncing between the individual threads.
This patch aligns the struct by 256 bytes to ensure that not a cache
line is shared among CPUs. 128 byte is the x86 worst case and grep says
that L1_CACHE_SHIFT is set to 8 on s390.
Hmm so this one should have been replaced with this:
https://marc.info/?l=linux-kernel&m=147690008801082
Thanks,
Davidlohr
