From: Roger Larsson <roger.larsson@norran.net>
To: Robert Love <rml@tech9.net>, Andre Pang <ozone@algorithm.com.au>,
Andrea Arcangeli <andrea@suse.de>
Cc: linux-kernel@vger.kernel.org, safemode@speakeasy.net,
Dieter.Nuetzel@hamburg.de, iafilius@xs4all.nl,
ilsensine@inwind.it, george@mvista.com
Subject: ksoftirqd? (Was: Re: [PATCH] Preemption Latency Measurement Tool)
Date: Sat, 22 Sep 2001 14:56:58 +0200 [thread overview]
Message-ID: <200109221301.f8MD1n129687@mailc.telia.com> (raw)
In-Reply-To: <1000939458.3853.17.camel@phantasy> <1001131036.557760.4340.nullmailer@bozar.algorithm.com.au> <1001139027.1245.28.camel@phantasy>
In-Reply-To: <1001139027.1245.28.camel@phantasy>
Hi,
We have a new kid on the block since we started thinking of a preemptive
kernel.
ksoftirqd...
Running with nice 19 (shouldn't it really be -19?)
Or have a RT setting? (maybe not since one of the reasons for
softirqd would be lost - would be scheduled in immediately)
Can't a high prio or RT process be starved due to missing
service (bh) after an interrupt?
This will not show up in latency profiling patches since
the kernel does what is requested...
Previously it was run directly after interrupt,
before returning to the interrupted process...
See:
/usr/src/develop/linux/kernel/softirq.c
/RogerL
--
Roger Larsson
Skellefteå
Sweden
next prev parent reply other threads:[~2001-09-22 13:02 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200109200758.f8K7wEG13675@zero.tech9.net>
2001-09-19 22:44 ` [PATCH] Preemption Latency Measurement Tool Robert Love
2001-09-20 1:40 ` Ignacio Vazquez-Abrams
2001-09-20 2:23 ` safemode
2001-09-20 1:13 ` David Lang
2001-09-20 2:57 ` Robert Love
2001-09-20 2:38 ` Robert Love
2001-09-20 6:31 ` Dieter Nützel
2001-09-20 6:31 ` Dieter Nützel
[not found] ` <20010920063143.424BD1E41A@Cantor.suse.de>
2001-09-20 6:41 ` Andrea Arcangeli
2001-09-20 7:57 ` Dieter Nützel
[not found] ` <200109200757.JAA60995@blipp.internet5.net>
2001-09-20 17:37 ` Roger Larsson
2001-09-20 21:29 ` Robert Love
2001-09-20 21:53 ` Dieter Nützel
2001-09-20 21:09 ` Robert Love
[not found] ` <20010920075751.6CA791E6B2@Cantor.suse.de>
2001-09-20 8:21 ` Andrea Arcangeli
2001-09-20 20:13 ` george anzinger
2001-09-20 20:38 ` Randy.Dunlap
2001-09-20 21:10 ` Robert Love
2001-09-20 21:35 ` Dieter Nützel
2001-09-20 22:03 ` Oliver Xymoron
2001-09-20 22:51 ` Dieter Nützel
2001-09-21 3:17 ` Robert Love
2001-09-21 15:48 ` george anzinger
2001-09-22 21:09 ` Dieter Nützel
2001-09-22 23:40 ` safemode
2001-09-22 23:46 ` Dieter Nützel
2001-09-23 0:15 ` safemode
2001-09-23 0:42 ` Dieter Nützel
2001-09-23 2:50 ` Robert Love
2001-09-23 3:14 ` george anzinger
2001-09-23 4:06 ` Dieter Nützel
2001-09-23 2:54 ` Robert Love
2001-09-27 0:02 ` [reiserfs-list] " Dieter Nützel
2001-09-23 2:58 ` Robert Love
[not found] ` <200109222340.BAA37547@blipp.internet5.net>
2001-09-23 0:38 ` Roger Larsson
2001-09-23 1:42 ` safemode
2001-09-23 3:02 ` Robert Love
2001-09-23 16:43 ` Roger Larsson
2001-09-23 2:44 ` Robert Love
2001-09-20 20:01 ` Tobias Diedrich
2001-09-20 20:27 ` Robert Love
2001-09-20 22:09 ` [PATCH] Preemption patch 2.4.9-ac12 Robert Love
2001-09-20 22:01 ` [PATCH] Preemption Latency Measurement Tool Robert Love
2001-09-22 3:57 ` Andre Pang
2001-09-22 6:10 ` Robert Love
2001-09-22 7:22 ` Andre Pang
2001-09-23 3:18 ` george anzinger
2001-09-23 3:21 ` Robert Love
2001-09-22 12:56 ` Roger Larsson [this message]
2001-09-22 13:14 ` ksoftirqd? (Was: Re: [PATCH] Preemption Latency Measurement Tool) Andrea Arcangeli
2001-09-22 20:51 ` Roger Larsson
2001-09-22 21:33 ` Andrea Arcangeli
2001-09-23 7:05 ` [PATCH] Preemption Latency Measurement Tool Robert Love
2001-09-23 12:03 ` Andre Pang
2001-09-23 18:31 ` Robert Love
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