[Stgt-devel] Different throughput numbers on SLES 10 and RHEL 5.1

Bart Van Assche bart.vanassche
Tue Feb 12 12:24:59 CET 2008

On Feb 12, 2008 12:17 PM, Robin Humble <robin.humble+stgt at anu.edu.au> wrote:
> are you loading mthca with
>   options ib_mthca tune_pci=1
> so that lspci -vvv says:
>   MaxReadReq 4096 bytes

An even better way than specifying tune_pci=1 is to perform a BIOS
upgrade. On an Intel S5000PAL this increased MaxReadReq from 128 to
512 bytes, which is enough to obtain maximal throughput on an SDR 4x
IB network.

Bart Van Assche.

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