From: Richard Gooch <rgooch@ras.ucalgary.ca>
Date: Thu, 4 Oct 2001 15:39:05 -0600
David S. Miller writes:
> lat_ctx doesn't execute any FPU ops. So at worst this happens once
> on GLIBC program startup, but then never again.
Has something changed? Last I looked, the whole lmbench timing harness
was based on using the FPU.
Oops, that's entirely possible...
But things are usually layed out like this:
capture_start_time();
context_switch_N_times();
capture_end_time();
So the FPU hit is only before/after the runs, not during each and
every iteration.
Franks a lot,
David S. Miller
davem@redhat.com
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sun Oct 07 2001 - 21:00:34 EST