linux-kernel - Can Linux kernel handle unsynced TSC?

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Date:	Fri, 29 Feb 2008 16:55:05 +0800
From:	"Zhao Forrest" <forrest.zhao@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	kvm-devel@...ts.sourceforge.net
Subject: Can Linux kernel handle unsynced TSC?

Sorry for reposting it.

For example,
1 rdtsc() is invoked on CPU0
2 process is migrated to CPU1, and rdtsc() is invoked on CPU1
3 if TSC on CPU1 is slower than TSC on CPU0, can kernel guarantee
that the second rdtsc() doesn't return a value smaller than the one
returned by the first rdtsc()?

Thanks,
Forrest
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