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[Qemu-devel] Re: [PATCH] Autodetect clock_gettime

From: Tristan Gingold
Subject: [Qemu-devel] Re: [PATCH] Autodetect clock_gettime
Date: Tue, 15 Mar 2011 14:47:19 +0100

On Mar 15, 2011, at 2:34 PM, Paolo Bonzini wrote:

> On 03/15/2011 02:16 PM, Tristan Gingold wrote:
>> Some POSIX OSes (such as Darwin) doesn't have clock_gettime.  This patch
>> falls back on gettimeofday if clock_gettime is not available.
> This may be okay as a stopgap measure, but any sane porting target for QEMU 
> should have a monotonic clock.  In fact, Darwin has it.

Yes mach primitives could be used.  But why isn't a monotonic clock used on 
Linux ?  According to man, CLOCK_MONOTONIC is monotonic
while CLOCK_REALTIME isn't.


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