Date: Sat, 25 Apr 1998 18:06:58 -0500 (EST) From: "John S. Dyson" <dyson@FreeBSD.ORG> To: mike@smith.net.au (Mike Smith) Cc: jkh@time.cdrom.com, toshok@Hungry.COM, freebsd-hackers@FreeBSD.ORG Subject: Re: threads performance Message-ID: <199804252306.SAA00505@dyson.iquest.net> In-Reply-To: <199804251916.MAA00591@antipodes.cdrom.com> from Mike Smith at "Apr 25, 98 12:16:35 pm"
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Mike Smith said: > > > The issue of kernel threads is on my plate, I have been *ordered* > > > > I think he was still wanting to know (and I'm darn curious myself) > > why our *user* threads are so slow in comparison to the user thread > > packages on other platforms. I'm not saying kernel threads aren't > > neat or needed, I'm just wondering what specific performance bogon > > we're suffering from in userland which makes it so? > > As was pointed out at the SFBUG, at least one of the problems is the > number of signal mask manipulation system calls that take place. > > Why this hurts so much be comparison to other platforms (which > supposedly also do this) is another question entirely. > We need to use a deferred mechanism, a lot like our interrupt code. -- John | Never try to teach a pig to sing, dyson@freebsd.org | it just makes you look stupid, jdyson@nc.com | and it irritates the pig. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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