[ofw] Any interrupt coalescing in WinOF?

[Chris Worley]

On Tue, Oct 12, 2010 at 10:34 AM, Tzachi Dar <tzachid at mellanox.co.il> wrote:
> What test/ulp are you using?

IOMeter with one worker atop each of 4 SRP-imported/multipathed
(round-robin) drives and a queue depth of 64.  I'm seeing ~450K random
4KB write IOPS.

With two HCA's, both running the latest firmware (as of Friday), I see
two cores on one NUMA node totally pegged/consumed, and affinity is
set on the Dynamo's to avoid these cores... so something is either
polling or interrupt handling on these.

I'm running the latest 2.3RC4 WinOF.

Thanks,

Chris
>
> Thanks
> Tzachi
>
>> -----Original Message-----
>> From: ofw-bounces at lists.openfabrics.org [mailto:ofw-
>> bounces at lists.openfabrics.org] On Behalf Of Chris Worley
>> Sent: Tuesday, October 12, 2010 6:33 PM
>> To: ofw at lists.openfabrics.org
>> Subject: [ofw] Any interrupt coalescing in WinOF?
>>
>> I'm seeing the interrupt handlers completely consuming a CPU and
>> becoming a bottleneck, and no interrupt load balancing across CPU's
>> (except w/ multiple HCA's, each HCA consumes one CPU w/ interrupts).
>>
>> Is interrupt coalescing manually tunable in WinOF?
>>
>> Or, am I totally off-base, and seeing polling and not interrupt
>> behavior?
>>
>> Thanks,
>>
>> Chris
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>