Anthony Liguori <anth...@codemonkey.ws> writes:
> Rusty Russell <ru...@rustcorp.com.au> writes:
>> (Qemu run under eatmydata to eliminate syncs)
>
> FYI, cache=unsafe is equivalent to using eatmydata.
Ah, thanks!
> I can reproduce this although I also see a larger standard deviation.
>
> BEFORE:
> MIN: 496
> MAX: 1055
> AVG: 873.22
> STDEV: 136.88
>
> AFTER:
> MIN: 494
> MAX: 1456
> AVG: 947.77
> STDEV: 150.89
BTW, how did you generate these stats? Consider this my plug for my
little stats filter:
https://github.com/rustyrussell/stats
>
> In my datasets, the stdev is higher in the after case implying that
> there is more variation. Indeed, the MIN is pretty much the same.
>
> GCC is inlining the functions, I'm still surprised that it's measurable
> at all.
GCC won't inline across compilation units without -flto though, so the
stub call won't be inlined, right?
Cheers,
Rusty.
