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InfiniBand Hobby and Home Users Group

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Mar 8, 2013

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newplan in InfiniBand Hobby and Home Users Group5 days ago (Show more Show less)

comparasion of one-sided VS two-sided operations

Hi, As we know, RDMA support one-sided operation(i.e. write/read) and two-sided operation(i.e. send/receive), according to literature(e.t. pilaf, ATC'13), researchers claims that: one-sided operation perform better than two-sided operation both in throughput and latency, NICs can achieve 2.45 million write/read operations per second while 0.7… (Show more Show less)

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akalia (to newplan) 2 days ago (Show more Show less)

We have explored this in great detail in our research: FaSST: Fast, Scalable and Simple Distributed Transactions with Two-Sided (RDMA) Datagram RPCs | USENIX Design Guidelines for High Performance RDMA Systems | USENIX https://dl.acm.org/citation.cfm?id=2626299

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bumann in InfiniBand Hobby and Home Users Group2 months ago (Show more Show less)

Proxmox 5.1 (Debian 9.2) Mellanox Connect-X2

Hi, i want to build a Mellanox IP Conenction between my Freenas and Proxmox Server. Both Servers have dual Port MHQH29-XTC Cards inside. I try: modprobe mlx4_en echo eth > /sys/bus/pci/devices/0000\:0d\:00.0/mlx4_port1 echo eth > /sys/bus/pci/devices/0000\:0d\:00.0/mlx4_port2 set a ip Adress ifup the interface On Freeenas i see the… (Show more Show less)

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march (to bumann) 2 months ago (Show more Show less)

Hi, Can you send me the output of: ifconfig -a, uname -a, arp -a, ip address show Thanks Marc

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justinclift in InfiniBand Hobby and Home Users Group3 months ago (Show more Show less)

Ethernet mode non-functional with recent CentOS7 kernels and ConnectX-2 cards?

Hi all, Is anyone else around running CentOS 7 x64 and ConnectX (1/2/3) series cards in eth mode? Asking because after rebooting my CentOS 7 x64 (1708) desktop this evening after a yum update, the Mellanox ConnectX-2 card in it (set to run in ethernet mode) refused to come up correctly. That was with the latest kernel (installed yesterday)… (Show more Show less)

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justinclift (to vikiz) 2 months ago (Show more Show less)

Understood Viki. That may have had something to do with why I opened this topic in the Hobby and Home Users Group, where it's common to use gear sourced from (eg) Ebay and similar. Regarding the problem itself, it's been confirmed by RH staff due to someone else reporting the same problem (I guess with a newer card). A working solution is…

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blackwall in InfiniBand Hobby and Home Users Group9 months ago (Show more Show less)

Where's the procedure of packing network protocol header in RoCE v2?

Hi, lately I began to study the driver's source code of MLNX_OFED_LINUX-4.0-2.0.0.1-rhel7.3-x86_64. When proceeding to the Network protocol stack, I met some problem,hoping for some guide from friends in the community. Please let me show the question: Now I'm using verbs api(black line at the below pic 2) and familiar with all its… (Show more Show less)

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blackwall (to li_hui_1982) 4 months ago (Show more Show less)

Hi, HuiLi. Your experiment shows that in that case, all QP are mapped to only one UDP port. According to our experiments, the mapping method is dynamic and changes with some factors(Network load and QP creation time I guess). If you want to see it, you may do more experiments and change the QP num or run several sample process individually at…

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ridgeworks in InfiniBand Hobby and Home Users Group5 months ago (Show more Show less)

MHGS18-XTC

I got myself a couple of these Mhgs18-XTC cards to play with. I did not expect much success but at the price of the cards its worth a play. I fell down at the first hurdle ... the driver. I running a windows 2012 R2 server with 2 cards now installed but im unable to find a working driver. I have read that you really need to update the firmware… (Show more Show less)

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chathurawi in InfiniBand Hobby and Home Users Group5 months ago (Show more Show less)

How to find out if the fabric is ready to IB communication after a switch reboot

I'm currently developing a script to automate a IB switch reboot (reload). Though I was able to trigger a switch reboot easily I don't know a way to find out if the switch is ready for normal operation. I have been using the time which I can issue an enable through CLI. will that be enough to identify the switch is ready for normal operations?

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cmm (to chathurawi) 5 months ago (Show more Show less)

When the switch responds to "ibswitches" after a reboot, run from any IB server, it is UP and detected by the Subnet Manager and ready to start passing traffic.

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bxmbxm in InfiniBand Hobby and Home Users Group5 months ago (Show more Show less)

backward compatibility FDR vs DDR

I'm end user of big IB infrastructure and we are trying to gain new experiences in this field in our group. We have access to http://www.mellanox.com/page/products_dyn?product_family=50&menu_section=49/ old DDR switch and we want to use it with some new FDR IB (or EDR) cards (ConnectX® series VPI QSFP28). My question is : Is it possible to use… (Show more Show less)

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cmm (to bxmbxm) 5 months ago (Show more Show less)

Hi, FDR to DDR is not supported. It is possible you may get link UP between a DDR and FDR device, but its not something tested/validated, so therefore is unsupported. QDR to DDR would work, FDR to QDR would work, as would EDR to FDR,,,,,but EDR to DDR will not work, and FDR to DDR likely won't work.

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haiyingc in InfiniBand Hobby and Home Users Group5 months ago (Show more Show less)

why do the UDP source ports unchange even if i added the -p parameters to the ib_write_bw ?

I am using ib_write_bw to test the performance of RDMA , however, from the tcpdum captures , i see all the udp source ports are 49152 . why is this happen? How can i get random source ports? Really appreciate if anyone can help with this!

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rliu008 in InfiniBand Hobby and Home Users Group5 months ago (Show more Show less)

Mellanox IS 5030 Licenses

Hi, I wonder if anyone can help me. I inherited a couple of Mellanox IS 5030 switches. I was able to log into the Web interface and it showed it had no licenses. I also don't see any configuration for VLAN and multicast IGMP support. Those are really the main functions I need. Please help answer the following questions: 1) Are those IS… (Show more Show less)

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rliu008 (to inbusiness) 5 months ago (Show more Show less)

Hi Jae-Hoon, Thank you for your reply. I contacted support and got the switches upgraded to the latest firmware. For others seeking the latest and probably the final version of the firmware, it is Firmware (latest. EOL. No more upgrades): EFM_PPC_M405EX EFM_1.1.3004.

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