Re: AMD X2 unsynced TSC fix?
From: Luca Tettamanti
Date: Fri Oct 27 2006 - 16:18:29 EST
Lee Revell <rlrevell@xxxxxxxxxxx> ha scritto:
> Someone recently pointed out to me that a Windows "CPU driver update"
> supplied by AMD fixes the unsynced TSC problem on dual core AMD64
> other incorrect timing effects that these applications may experience on
> dual-core processor systems, by periodically adjusting the core
> time-stamp-counters, so that they are synchronized."
> What are the chances of Linux getting a similar fix?
There's always a window where the TSCs are not in sync (and userspace may
see a non-monotonic counter); furthermore when C'n'Q is active TSCs
aren't updated at a fixed frequency, userspace cannot use TSC for timing
> While we're on all of this, are we going to change "tained" to some
> other less alarmist word?
"screwed" -- Alexander Viro
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/