Re: Wait free LW_SHARED acquisition

--On 27. September 2013 09:57:07 +0200 Andres Freund 
<andres@2ndquadrant.com> wrote:

> Ok, was free:
>
> padding + 16 partitions:
> tps = 147884.648416
>
> padding + 32 partitions:
> tps = 141777.841125
>
> padding + 64 partitions:
> tps = 141561.539790
>
> padding + 16 partitions + new lwlocks
> tps = 601895.580903 (yeha, still reproduces after some sleep!)

Hmm, out of interest and since i have access to a (atm) free DL580 G7 (4x 
E7-4800 10core) i've tried your bench against this machine and got this 
(best of three):

HEAD (default):

tps = 181738.607247 (including connections establishing)
tps = 182665.993063 (excluding connections establishing)

HEAD (padding + 16 partitions + your lwlocks patch applied):

tps = 269328.259833 (including connections establishing)
tps = 270685.666091 (excluding connections establishing)

So, still an improvement but far away from what you got. Do you have some 
other tweaks in your setup?

-- 
Thanks
Bernd