Date: Fri, 31 Oct 2008 00:44:16 -0700 From: Julian Elischer <julian@elischer.org> To: Krassimir Slavchev <krassi@bulinfo.net> Cc: freebsd-performance@freebsd.org, Sam Xia <xiazhongqi@huawei.com> Subject: Re: 1. thread switching time? (Krassimir Slavchev) Message-ID: <490AB750.9040505@elischer.org> In-Reply-To: <490AB477.2080001@bulinfo.net> References: <000001c93b0c$6195e6b0$2f096f0a@china.huawei.com> <490AB477.2080001@bulinfo.net>
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Krassimir Slavchev wrote: > > Also, I am able to set HZ=100000 but the thread switching time is still > ~1ms. You must be talking about the time that a thread can run before it is pushed out by other threads? I know I've seem many x 10,000 context switches in some cases, i.e. look at very high interrupt rates etc. so I guess I'm not sure what you are measuring.. at one time the scheduling quantum was independent of Hz. I am not sure how true that is now..
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