Messages in this thread | | | Date | Wed, 31 Jul 2002 09:33:34 -0300 (BRT) | From | Rik van Riel <> | Subject | Re: profile of 2.4.19-rc3-ac4 |
| |
On Wed, 31 Jul 2002, Diego Calleja wrote:
> This is the profile of a 2.4.19-rc3-ac4 after a heavy disk /swap usage. > I send it because it seems that page_referenced takes a lot of time....
That might well be because it's being called a LOT, since in a disk/swap intensive workload we want to make very sure we evict the right page from RAM.
A disk seek is worth about ten million CPU cycles...
> 607951 default_idle 15198,7750 > 1019 page_referenced 16,9833 > 831 serial_in 15,9808 > 406 __rdtsc_delay 14,5000 > 836 unlock_page 6,3333
Rik -- Bravely reimplemented by the knights who say "NIH".
http://www.surriel.com/ http://distro.conectiva.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/
| |