Em Mon, Oct 24, 2016 at 11:50:50AM -0700, Davidlohr Bueso escreveu: > 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
Humm, sorry, can you please send a patch fixing this? - Arnaldo
