lkml.org 
[lkml]   [2007]   [Jan]   [10]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateWed, 10 Jan 2007 13:03:08 +0100
FromPierre Peiffer <>
SubjectRe: [PATCH 2.6.20-rc4 1/4] futex priority based wakeup
Pierre Peiffer a écrit :
> Ulrich Drepper a écrit :
>>
>> I have never seen performance numbers for this.  If it is punishing
>> existing code in a measurable way I think it's not anacceptable default
>> behavior.

> May be, supposing it makes sense to respect the priority order only for 
> real-time pthreads, I can register all SCHED_OTHER threads to the same 
> MAX_RT_PRIO priotity ?

Moreover, the performance must be considered, sure, but after all, "man 
pthread_cond_broadcast" says:
<<
        If more than one  thread  is  blocked  on  a  condition  variable,  the
        scheduling  policy  shall  determine  the  order  in  which threads are
        unblocked.
 >>

... this is not true today ...
(of course, "shall" does not mean "mandatory", I know ;-) )

-- 
Pierre
-
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/

\
 
 \ /
  Last update: 2007-01-10 12:43    [from the cache]
©2003-2008