[ofw] Question on WSD performance.

[Tzachi Dar]

Hi,

Iperf is using messages of 8 kb by default. On this size of messages
performance of WSD should be around 1.6 Gb/sec. If this is not enough
for you there are two things that you can try and do:

1) Use bigger messages, even up to messages of 1MB. (By the way, it
seems that for messages of 4 kb, BW will still be bigger).
2) Use SDP. Please note that SDP gives better BW for small messages as
well as for bigger messages.

Thanks
Tzachi


> -----Original Message-----
> From: ofw-bounces at lists.openfabrics.org 
> [mailto:ofw-bounces at lists.openfabrics.org] On Behalf Of Clint Todish
> Sent: Saturday, December 22, 2007 12:05 AM
> To: ofw at lists.openfabrics.org
> Subject: [ofw] Question on WSD performance.
> 
> Howdy,
> 
> I've recently installed OF on a pair of 2K3 STD 64 bit 
> servers - all patches/updates. Each has a Mellanox 25208 
> (128MB) dual port 4x SDR adapter. For testing, these two 
> machines are plugged into each other back to back with OpenSM 
> running on one. Everything seems to be functioning properly, 
> however my overall throughput seems fairly low for the 
> available bandwidth.
> 
> TCP window size: 8.00 KByte (default)
> ------------------------------------------------------------
> [204] local 10.21.0.10 port 5001 connected with 10.21.0.1 port 3381
> [ ID] Interval       Transfer     Bandwidth
> [204]  0.0-10.0 sec  1.35 GBytes  1.16 Gbits/sec
> 
> vstat shows:
> 
>         hca_idx=0
>         uplink={BUS=UNRECOGNIZED (33)}
>         vendor_id=0x02c9
>         vendor_part_id=0x6278
>         hw_ver=0xa0
>         fw_ver=4.08.0200
>         PSID=_02F0110001
>         node_guid=0005:ad00:000c:28dc
>         num_phys_ports=2
>                 port=1
>                 port_state=PORT_ACTIVE (4)
>                 link_speed=2.5Gbps (1)
>                 link_width=4x (2)
>                 rate=10
>                 sm_lid=0x0001
>                 port_lid=0x0004
>                 port_lmc=0x0
>                 max_mtu=2048 (4)
> 
>                 port=2
>                 port_state=PORT_INITIALIZE (2)
>                 link_speed=2.5Gbps (1)
>                 link_width=4x (2)
>                 rate=10
>                 sm_lid=0x0000
>                 port_lid=0x0000
>                 port_lmc=0x0
>                 max_mtu=2048 (4)
> 
> It would seem that WSD isn't kicking in here at all given the 
> results of iperf/netio. Anything that I should check for? 
> Adapter settings?
> 
> Any help would be appreciated.
> 
> -C
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