Re: kern/38792: sched_pstats takes too long

[Mindaugas Rasiukevicius <rmind%NetBSD.org@localhost>]

The following reply was made to PR kern/38792; it has been noted by GNATS.

From: Mindaugas Rasiukevicius <rmind%NetBSD.org@localhost>
To: ad%NetBSD.org@localhost
Cc: gnats-bugs%NetBSD.org@localhost
Subject: Re: kern/38792: sched_pstats takes too long
Date: Mon, 2 Jun 2008 22:08:34 +0100

 Hello,
 
 > >Number:         38792
 > >Category:       kern
 > >Synopsis:       sched_pstats takes too long
 
 > >Fix:
 > Maybe:
 > 
 > - Make sched_pstats use a marker process so it does not hold proc_lock
 >   for so long?
 > 
 > - Have two classes of callout, like Solaris. One run from a softint
 >   as we do now, and another run from a kthread, for slow items like
 >   sched_pstats.
 
 Sorry, what do you mean by "marker process"?
 
 Hmm.. I have noticed that some calculations could be lockless.
 
 -- 
 Best regards,
 Mindaugas
 www.NetBSD.org