Messages in this thread | | | Date | Thu, 30 Oct 2003 17:50:37 -0500 | From | Chris Friesen <> | Subject | Re: gettimeofday resolution seriously degraded in test9 |
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Richard B. Johnson wrote:
> There isn't any magic that can solve this problem. It turns out > that with later Intel CPUs, one can get CPU-clock resolution > from rdtsc. However, this is hardware-specific. If somebody > modifies the gettimeofday() and the POSIX clock routines to > use rdtsc when available, a lot of problems will go away.
Its not just x86. PowerPC has a similar call, so does MIPS, and I'm sure most other modern cpus do too.
The only problem with this stuff is that they usually slow down when the cpu does, so laptops and other power-managed chips cause complexities.
Chris
-- Chris Friesen | MailStop: 043/33/F10 Nortel Networks | work: (613) 765-0557 3500 Carling Avenue | fax: (613) 765-2986 Nepean, ON K2H 8E9 Canada | email: cfriesen@nortelnetworks.com
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