Messages in this thread | | | Date | Mon, 4 Sep 2000 09:54:22 +0200 (CEST) | From | Ingo Molnar <> | Subject | Re: zero-copy TCP |
| |
On Mon, 4 Sep 2000 kumon@flab.fujitsu.co.jp wrote:
> The experiment showed the following prefetching could reduce 20-30% of > csum_partial_copy_generic() execution time.
Please test it and post the numbers. csum_partial_copy_generic() already does prefetching - the real test would be to check lat_tcp and bw_tcp numbers over gigabit, with and without this patch applied. (the same numbers over localhost dont really count.) Eg. we had smart KNI-based memcpy routines as well, and it turned out that bw_tcp over gigabit actually got slower. [testing over 100mbit isnt enough obviously because x86 CPUs csum much faster than that.]
Ingo
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
| |