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Re: [lwip-users] Required accuracy of timers


From: H. Peter Anvin
Subject: Re: [lwip-users] Required accuracy of timers
Date: Wed, 05 Mar 2008 14:30:28 -0800
User-agent: Thunderbird 2.0.0.12 (X11/20080226)

H. Peter Anvin wrote:
Frédéric BERNON wrote:
microseconds? Which ones? I thought most were in milliseconds. Which lwIP release do you use?

Sorry, I might be mistaken. I'm looking at 1.3.0. Either way, the question still holds.


I guess I really should explain the background.

I'm looking at using this in a raw PC BIOS environment, where the only *guaranteed* timer only has a 55 ms granularity. There are ways to get better resolution by going straight to the hardware, but PC hardware being what it is (utter crap) that's a risky thing for trying to make something that works on all platforms.

Hence the question.

The good news it that CPU is generally plentiful.

        -hpa




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