From: Hubertus Franke <frankeh@watson.ibm.com>
To: Guest section DW <dwguest@win.tue.nl>
Cc: Rusty Russell <rusty@rustcorp.com.au>,
rajancr@us.ibm.com, linux-kernel@vger.kernel.org,
lse-tech@lists.sourceforge.net
Subject: Re: Fwd: [Lse-tech] get_pid() performance fix
Date: Thu, 7 Mar 2002 18:14:10 -0500 [thread overview]
Message-ID: <20020307231307.D54F13FE06@smtp.linux.ibm.com> (raw)
In-Reply-To: <20020305145004.BFA503FE06@smtp.linux.ibm.com> <20020307190635.9DE533FE08@smtp.linux.ibm.com> <20020307194602.GA13092@win.tue.nl>
In-Reply-To: <20020307194602.GA13092@win.tue.nl>
On Thursday 07 March 2002 02:46 pm, Guest section DW wrote:
> On Thu, Mar 07, 2002 at 02:07:38PM -0500, Hubertus Franke wrote:
> > On Thursday 07 March 2002 09:54 am, Guest section DW wrote:
> > > On Thu, Mar 07, 2002 at 09:35:09AM -0500, Hubertus Franke wrote:
> > > ...
> > >
> > > Long ago I submitted a patch that changed the max pid from 15 bits to
> > > 24 or 30 bits or so. (And of course removed the inefficiency noticed
> > > by some people in the current thread.)
> >
> > I don't think that will solve the N^2 problem
>
> Do you understand "inefficiency"? And "remove"?
I do, what's your point ?
I haven't seen your patch picked up....
I do understand that when you occasionally get into this scenario
of the loop that particularly for large thread counts this stalls the system
for seconds (say 30, with the tasklock held).
--
-- Hubertus Franke (frankeh@watson.ibm.com)
next prev parent reply other threads:[~2002-03-07 23:13 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-03-05 1:57 Fwd: [Lse-tech] get_pid() performance fix Hubertus Franke
2002-03-05 16:26 ` OGAWA Hirofumi
2002-03-05 16:43 ` Hubertus Franke
2002-03-07 3:56 ` Rusty Russell
2002-03-07 14:35 ` Hubertus Franke
2002-03-07 14:54 ` Guest section DW
2002-03-07 19:07 ` Hubertus Franke
2002-03-07 19:44 ` Richard B. Johnson
2002-03-07 19:46 ` Guest section DW
2002-03-07 23:14 ` Hubertus Franke [this message]
2002-03-07 15:21 ` Dave McCracken
2002-03-05 16:43 Rajan Ravindran
2002-03-05 17:57 ` OGAWA Hirofumi
2002-03-05 19:53 ` Hubertus Franke
2002-03-05 20:10 ` OGAWA Hirofumi
2002-03-05 21:59 ` Hubertus Franke
2002-03-05 22:48 ` OGAWA Hirofumi
2002-03-05 23:40 ` Hubertus Franke
2002-03-07 22:37 Manfred Spraul
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