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

[Nick Piggin <nickpiggin@yahoo.com.au>]

Paul Jackson wrote:
> > You're probably correct on that model. However, it all depends on the actual
> > workload. Are people who actually have large-CPU (>256) systems actually
> > running fork()-heavy things like webservers on them, or are they running things
> > like database servers and computations, which tend to have persistent
> > processes?
>
>
> It may well be mostly as you say - the large-CPU systems not running
> the fork() heavy jobs.
>
> Sooner or later, someone will want to run a fork()-heavy job on a
> large-CPU system.  On a 1024 CPU system, it would apparently take
> just 14 exits/sec/CPU to hit this bottleneck, if Jay's number of
> 14000 applied.

Half the CPUs in that system are probably going to be several
router hops away, won't they? I'll take a guess and say they're
an order of magnitude too optimistic for such a system ;)

--
SUSE Labs, Novell Inc.
Send instant messages to your online friends http://au.messenger.yahoo.com 
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/