Re: [Patch][RFC] Disabling per-tgid stats on task exit intaskstats

[Andrew Morton]

Jay Lan <jlan@xxxxxxxxxxxx> wrote:
>
> Testing with all delay-accounting patches as been in your 2.6.27-mm3
> tree as of 6/26 afternoon (ie, including the send-tgid-once, and
> avoid-sending-without-listeners patches), i do not see measurable
> performance difference with and without tgid processing when the
> exit rate was controlled to around 1000 exit/sec.
> 
> As a result i am OK to not include a design of a system-wise
> init-time configuration option (for per-thread group data processing)
> in the taskstats interface.

Sounds good, thanks.

> The ENOBUFS i experienced in my testing would start to happen
> when exit rate at around 14000 exits/sec. While our fields confirmed
> that a 1000 threads exit/sec was a real, i have no reason to be
> concerned of 14000 exits/sec rate. ;)

1000 exits/sec/CPU can happen.  How many CPUs did that machine have?
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/