lkml.org 
[lkml]   [2013]   [Oct]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] x86: Run checksumming in parallel accross multiple alu's

* Andi Kleen <andi@firstfloor.org> wrote:

> Neil Horman <nhorman@tuxdriver.com> writes:
>
> > Sébastien Dugué reported to me that devices implementing ipoib (which
> > don't have checksum offload hardware were spending a significant
> > amount of time computing
>
> Must be an odd workload, most TCP/UDP workloads do copy-checksum
> anyways. I would rather investigate why that doesn't work.

There's a fair amount of csum_partial()-only workloads, a packet does not
need to hit user-space to be a significant portion of the system's
workload.

That said, it would indeed be nice to hear which particular code path was
hit in this case, if nothing else then for education purposes.

Thanks,

Ingo
--
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/

\
 
 \ /
  Last update: 2013-10-14 10:21    [W:0.427 / U:4.832 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site