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Re: [PATCH 1/3] Add prctl commands PR_GET_TSC and PR_SET_TSC

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From: Andi Kleen <andi@...>
To: H. Peter Anvin <hpa@...>
Cc: Erik Bosman <ejbosman@...>, Andrew Morton <akpm@...>, Thomas Gleixner <tglx@...>, Ingo Molnar <mingo@...>, Arjan van de Ven <arjan@...>, Andrea Arcangeli <andrea@...>, Linus Torvalds <torvalds@...>, <linux-kernel@...>
Subject: Re: [PATCH 1/3] Add prctl commands PR_GET_TSC and PR_SET_TSC
Date: Sunday, April 13, 2008 - 4:50 pm

>

I'm a little sceptical it will work reliably, but we'll see.

There's also LSL (forgot that earlier). It is used by the vgetcpu()
because it's faster than CPUID or RDTSCP. Kernel
sets a magic segment up which has different limits for different CPUs.

-Andi

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Messages in current thread:
[PATCH 1/3] Add prctl commands PR_GET_TSC and PR_SET_TSC, Erik Bosman, (Fri Apr 11, 12:54 pm)
Re: [PATCH 1/3] Add prctl commands PR_GET_TSC and PR_SET_TSC, Andi Kleen, (Sun Apr 13, 5:07 am)
Re: [PATCH 1/3] Add prctl commands PR_GET_TSC and PR_SET_TSC, Erik Bosman, (Sun Apr 13, 5:44 am)
Re: [PATCH 1/3] Add prctl commands PR_GET_TSC and PR_SET_TSC, Andi Kleen, (Sun Apr 13, 12:47 pm)
Re: [PATCH 1/3] Add prctl commands PR_GET_TSC and PR_SET_TSC, H. Peter Anvin, (Sun Apr 13, 3:29 pm)
Re: [PATCH 1/3] Add prctl commands PR_GET_TSC and PR_SET_TSC, Andi Kleen, (Sun Apr 13, 4:50 pm)
Re: [PATCH 1/3] Add prctl commands PR_GET_TSC and PR_SET_TSC, H. Peter Anvin, (Sun Apr 13, 4:53 pm)