Re: [Valgrind-developers] performances of trunk compared to 3.8.1 ?

[Maran P. <ma...@li...>]

On 09/05/2013 04:02 AM, Philippe Waroquiers wrote:
> At least on x86 (old pentium, and on gcc20), I observe some
> performance regression (e.g. on perf/bz2) between valgrind 3.8.1
> and trunk.
> Also, I have the feeling that regression tests are slower.
>
> Does anybody share such feelings ?
>
> And better, some measurements e.g. on mips or s390 or arm,
> as I have no access (anymore) to such platforms ?
>
> e.g. assuming you have a trunk and a 3.8.1 build, you could do
>     perl perf/vg_perf --vg=../trunk --vg=../3.8.1 --reps=5 perf
>
Attached is the output of the command on s390 (z196, gcc 4.3.4).

Overall, there is a performance regression in s390 as well specifically 
with 39% slowdown in bz2

-- bz2 --
bz2      trunk      :0.70s  no: 6.6s ( 9.4x, -----)  me:21.5s (30.7x, -----)
bz2      valgrind-3.8.1:0.70s  no: 6.4s ( 9.1x,  2.9%)  me:13.1s (18.8x, 
38.8%)


--Maran