On Mon, 23 Jul 2007, Or Gerlitz wrote:
>> Running the latency test provided with the perftest package on my systems (*)
>> I get the below results. Does anyone has insight why the --minimal-- and
>> typical
>> UD latency is 1us ( = 20%) worse then the --minimal-- and typical RC
>> latency???
> running the latecy test on a similar system (RH5 smp / four way Xeon 1.9GHz /
> 4GB RAM) but this time with the memfree --Hermon-- HCA (25418 / FW 2.1.0) the
> minimal
> AND typical UD latecy is very much the same as the RC and UC ones which is
> ~1.5us
> So it both fixes the UD issue on Arbel and improves the latency from 4.5us to
> 1.5us
A third run, now over a memfree Sinai HCA (25204 / FW 1.2.0) the UD and RC
latency are
quite the same, around 5.3us but the result is worse then the Arbel one in
about 0.7us ...
Or.
[EMAIL PROTECTED] ~]# ib_send_lat -c RC storm7
------------------------------------------------------------------
Send Latency Test
Inline data is used up to 400 bytes message
Connection type : RC
local address: LID 0x09 QPN 0xd50407 PSN 0x7aaaf1
remote address: LID 0x0b QPN 0x0405 PSN 0x292565
Mtu : 2048
------------------------------------------------------------------
#bytes #iterations t_min[usec] t_max[usec] t_typical[usec]
2 1000 5.27 63.27 5.32
------------------------------------------------------------------
[EMAIL PROTECTED] ~]# ib_send_lat -c UD storm7
------------------------------------------------------------------
Send Latency Test
Inline data is used up to 400 bytes message
Connection type : UD
local address: LID 0x09 QPN 0xd60407 PSN 0xcc70ba
remote address: LID 0x0b QPN 0x10405 PSN 0x6794b5
------------------------------------------------------------------
#bytes #iterations t_min[usec] t_max[usec] t_typical[usec]
2 1000 5.38 38.88 5.45
------------------------------------------------------------------
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