| Date | Mon, 24 Oct 2016 11:50:50 -0700 | From | Davidlohr Bueso <> | Subject | Re: [PATCH 33/37] perf bench futex: Cache align the worker struct |
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On 2016-10-24 09:20, Arnaldo Carvalho de Melo wrote: > From: Sebastian Andrzej Siewior <bigeasy@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
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