Date: Mon, 19 Mar 2001 20:43:35 +0100 From: Thierry Herbelot <thierry@herbelot.com> To: hackers@freebsd.org Subject: scheduling frequency for threaded applications ? Message-ID: <3AB66167.7DE93AB2@herbelot.com>
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Hello,
I'm developping a network benchmark application ("packet blaster").
The current version uses many processes, to send and receive packets,
and collate statistics.
when I look at top(1), I see most of the time taken is in the "system"
category. I assume this is due to the many context switches between the
collaborating processes.
If I want to get rid of this system overhead, one solution is to use
threads (all sharing the same address space, thus no more context
switching).
My question is : how otfen are the threads rescheduled ?
(all threads are mainly always blocked until an event arrives, either a
timeout with select() or a packet with recevmsg())
I've had a quick look a TFM, but I don't see anything applicable
(pthread_setschedparam(3) for example does not speak of scheduling
frequency)
--
Thierry Herbelot
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