Date: Wed, 18 Dec 1996 15:07:47 -0500 From: Garrett Wollman <wollman@lcs.mit.edu> To: Laurent Joncheray <lpj@ans.net> Cc: current@freebsd.org Subject: microtime() resolution? Message-ID: <9612182007.AA08255@halloran-eldar.lcs.mit.edu> In-Reply-To: <199612181933.OAA13797@obelix.aa.ans.net> References: <199612181933.OAA13797@obelix.aa.ans.net>
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<<On Wed, 18 Dec 1996 14:33:21 -0500 (EST), Laurent Joncheray <lpj@ans.net> said: > function, called from the IP driver? I mean, it is supposed to return > the time in us, but is the timer updated every us, or more often, or less? The timer is updated `hz' times a second (i.e., every 10 msec). However, microtime() uses a hardware register to interpolate between clock ticks with potentially-sub-microsecond resolution. -GAWollman -- Garrett A. Wollman | O Siem / We are all family / O Siem / We're all the same wollman@lcs.mit.edu | O Siem / The fires of freedom Opinions not those of| Dance in the burning flame MIT, LCS, ANA, or NSA| - Susan Aglukark and Chad Irschick
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