RE: Slow performance with librspreload.so

["Rupert Dance" <rsdance-rzwDkyJvnYokmLvzuZlaBw@public.gmane.org>]

The Vendor ID indicates that this is a Voltaire card which probably means it
is an older card. Some of the early Mellanox based cards did not support
anything bigger than 2048. 

  00-08-F1   (hex)		Voltaire
  0008F1     (base 16)		Voltaire
  				9 Hamenofim st.
				Herzelia  46725
				ISRAEL

Checking for FW updates cannot hurt but you may well be restricted to 2048

-----Original Message-----
From: Gandalf Corvotempesta [mailto:gandalf.corvotempesta-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org] 
Sent: Saturday, August 31, 2013 5:21 AM
To: Rupert Dance
Cc: Hefty, Sean; linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: Slow performance with librspreload.so

2013/8/30 Rupert Dance <rsdance-rzwDkyJvnYokmLvzuZlaBw@public.gmane.org>:
> One way to set or check mtu is with the ibportstate utility:
>
> Usage: ibportstate [options] <dest dr_path|lid|guid> <portnum> [<op>] 
> Supported ops: enable, disable, reset, speed, width, query, down, arm, 
> active, vls, mtu, lid, smlid, lmc

I've tried but max MTU is 2048 on one device:

$ sudo ibv_devinfo
hca_id: mthca0
transport: InfiniBand (0)
fw_ver: 4.7.600
node_guid: 0008:f104:0398:14cc
sys_image_guid: 0008:f104:0398:14cf
vendor_id: 0x08f1
vendor_part_id: 25208
hw_ver: 0xA0
board_id: VLT0040010001
phys_port_cnt: 2
port: 1
state: PORT_ACTIVE (4)
max_mtu: 2048 (4)
active_mtu: 2048 (4)
sm_lid: 1
port_lid: 2
port_lmc: 0x00
link_layer: InfiniBand

any workaround? Maybe a firmware update ?


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