[Python-Dev] --with-tsc compile fails (original) (raw)

Jeremy Hylton jhylton at gmail.com
Wed Sep 15 20:56:43 CEST 2004

On Wed, 15 Sep 2004 14:51:55 +0100, Michael Hudson <mwh at python.net> wrote:

Jeremy Hylton <jhylton at gmail.com> writes:

> I'm feeling pretty out of it :-). I'm very happy to see that the > Pentium tsc patch made it into the core; I had missed it. I'm amused > that the Pentium tsc patch works for PPC, too. I did consider changing all the names but couldn't be bothered.

There's nothing wrong with amusing names for obscure stuff like this :-).

OTOH, I think one could replace the include by

_#define rdtscll(val) _ asm volatile("rdtsc" : "=A" (val)) if my limited googling is anything to go by. It also seems asm/msr.h is a "kernel internal header with absolutely no stable API properties...." (Redhat bugzilla). So, now I've written this email , I think we should take out the include and put in the #define.

I'll give it a try tonight. I double-checked and my somewhat tweaked RH Linux distro doesn't have an asm/msr.h. I'd rather not try to find out if there is an rdtscll() defined somewhere else.

jeremy

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