Re: latency ibping between two hosts
ibping is not really sensitive to latency, and is basically used to test basic inband connectivity. Not to say you can't get better results but I would test with ib_write_lat with and bind it to...
View ArticleRe: Frequent TCP retransmissions with ConnectX-3 EN
I would start with getting counters from the NIC, for example with ethtool, what type of traffic are you running ?
View ArticleRe: unable to create QP with IBV_EXP_QPT_DC_INI
Hi Erez, I got this error when running "ib_write_lat" passing "-c DC" option. I have also tried the example come with libibverbs-1.1.8, "dcini.c", it also gave the same error. Thank you,
View ArticleRe: unable to create QP with IBV_EXP_QPT_DC_INI
Hi Sam, Over what HCA ? ConnectX-3/Connect-IB/ConnectX-4 ? and with IB or RocE ?
View ArticleStack Huawei S5700-52X-PWR-LI-AC
Does S5700-52X-PWR-LI-AC support stack?Huawei S5700-52X-PWR-LI-AC is stacking through service ports and need to purchase the stack cable, it also support max stack 9 switches.
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Re: LACP LAG only sends traffic down single interface
Hello Barry, The default load-balance is : show interfaces port-channel load-balancesource-destination-mac So this would explain why the multiple iperf threads (using different layer 4 (TCP) ports) are...
View ArticleRe: Problem configuring and using IPoIB
Hi Trevor, can you send the following output: 1. ibnetdiscover2. ibdiagnet -r (all files under /var/tmp/ibdiagnet2/)3. sminfo4. saquery5. saquery -s
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Re: Problem configuring and using IPoIB
ibnetdiscoveribdiagnet -rsminfo saquerysaquery -s
View ArticleRe: Problem configuring and using IPoIB
and I've just checked, and I have the most recent FW on the mellanox site for an HT26428 (2.9.1000)
View Articleforwarding traffic between the ports
Hello, how to set upforwardingtrafficbetween interfaces HCA? Ringtopology.
View ArticleRe: Is the MC2206310 available in 1 meter length?
Ric Unfortunaly the shortest AOC we have is 3 meters. For shorter lengths our customers use copper cables given the cost benefit. We do not support lengths shorter than 3 meters are there is no...
View ArticleRe: Stack Huawei S5700-52X-PWR-LI-AC
I think you should contact Huawei on this question....
View Article40000LR not being advertised
I'm experiencing some difficulties in getting 40g LR optics to work with my Connectx-3 card.Relevent diagnostics: /etc/redhat-release:CentOS Linux release 7.1.1503 (Core) uname -a: Linux x.x.x.x...
View ArticleRe: Frequent TCP retransmissions with ConnectX-3 EN
Traffic is exchange market data (mcast) and orders (tcp/ip sockets). Not really observing any mcast drops -- just the retransmits. Nothing reported by ethtool as far as drops or errors: $ ethtool -S...
View ArticleRe: unable to create QP with IBV_EXP_QPT_DC_INI
Hi Sam, DCT is only possible with mlx5 architecture, so only Connect-IB or ConnectX-4 Regards,Erez
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Re: Frequent TCP retransmissions with ConnectX-3 EN
Thanks, So you're saying a retransmit is not observed specifically when you're bursting traffic, but it is more random on normal load? What flow steering mode are you using ? you can check dmesg when...
View ArticleRe: Direct connect two windows machines with CX314A and passive copper cable
I just wanted to post here so that anyone who was reading my issue above would have the information. My only problem was that I was trying to use a VPI copper cable instead of the 40Gb ethernet copper...
View ArticleRe: HCA extended port counters
Yes exactly. There seems to be hardware and OFED version dependency whether the PortExtendedCounters attribute is exposed. I haven't discovered the pattern yet. Sometimes "perfquery --extended" will...
View ArticleRe: HCA extended port counters
At least in upstream kernel, I only see mandatory PortCounters support in /sys/class/infiniband but didn't chase every HCA driver to see if they augment this. Which HCA(s) and which OFED or MOFED are...
View ArticleRe: Problem configuring and using IPoIB
Does flex boot cause issues with trying to use IB normally? ibdiagnet seems to indicate errors in the FW but the most recent FW I found on the mlnx site is 2.9.100, and that is what my cards say they...
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