[openib-general] heads-up - ipoib NAPI

[harish]

Hi Eli,

Thanks for sharing the results with us. It is great to see the reduction in
Interrupts. Could you please specify the netperf test specifications
[message size; socket size]. Wondering what the numbers would be if we use
large socket and message sizes [128K & 64K respectively]. The reason for the
request is to make sure we are not hitting any TCP related bottleneck while
comparing NAPI vs. no NAPI cases. Please let me know what you think.

Thanks,
harish

On 9/21/06, Eli cohen <eli at dev.mellanox.co.il> wrote:
>
> Hi,
>
> I have a draft implementation of NAPI in ipoib and got the following
> results:
>
> System descriptions
> ===================
> Quad CPU E64T 2.4 Ghz
> 4 GB RAM
> MT25204 Sinai HCA
>
> I used netperf for benchmarking, the BW test ran for 600 seconds with 8
> clients and 8 servers.
>
> The results I received are bellow:
>
> netperf TCP_STREAM:
>                 BW [MByte/sec]    clients side [irqs/sec]   server side
> [irqs/sec]
>                 --------------    -----------------------
> ----------------------
> without NAPI:       506                    86441                   66311
> with NAPI:          550                     6830                   13600
>
>
> netperf TCP_RR:
>                 rate [tran/sec]
>                 ---------------
> without NAPI:      39600
> with NAPI:         39470
>
>
>
> Please note this is still under work and we plan to do more tests and
> measure on other devices.
>
>
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