[PATCH V2] powerpc/irq: Enable some more exceptions in /proc/interrupts interface
mpe at ellerman.id.au
Mon Jul 13 15:41:16 AEST 2015
On Mon, 2015-07-13 at 10:54 +0530, Anshuman Khandual wrote:
> On 07/10/2015 12:40 PM, Michael Neuling wrote:
> > What's the performance impact of this? If you run this test with --fp,
> > --altivec or --vector what is the impact of adding this patch?
> > http://ozlabs.org/~anton/junkcode/context_switch2.c
> > eg
> > ./context_switch2 --fp 0 0
> Please find the results here which looks similar with or without
> the patch being applied.
No they don't look similar with or without.
> (A) Floating point context switches (context_switch2 --fp 0 0)
If you just sort them you see:
It looks like ~1% degradation. Please run the test more times (maybe 1000) and
see how the numbers look.
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