[Stgt-devel] Performance of SCST versus STGT

[Bart Van Assche]

On Jan 17, 2008 6:45 PM, Pete Wyckoff <pw at osc.edu> wrote:
> There's nothing particularly stunning here.  Suspect Bart has
> configuration issues if not even IPoIB will do > 100 MB/s.

By this time I found out that the BIOS of the test systems (Intel
Server Board S5000PAL) set the PCI-e parameter MaxReadReq to 128
bytes, which explains the low InfiniBand performance. After changing
this parameter to 4096 bytes the InfiniBand throughput was as
expected: ib_rdma_bw now reports a
bandwidth of 933 MB/s.

Bart.