[openib-general] ibv_devinfo

[Pradeep Satyanarayana]

Roland,

Here is what I mean (partial output of "ibv_devinfo -v"):

port:   1
state:                  PORT_ACTIVE (4)
max_mtu:                2048 (4)
active_mtu:             2048 (4)
sm_lid:                 4
port_lid:               128
port_lmc:               0x02
max_msg_sz:             0x0
port_cap_flags:         0x00000000
max_vl_num:             0
bad_pkey_cntr:          0x0
qkey_viol_cntr:         0x0
sm_sl:                  0
pkey_tbl_len:           1
gid_tbl_len:            1
subnet_timeout:         8
init_type_reply:        0
active_width:           12X (8)
active_speed:           2.5 Gbps (1)
phys_state:             invalid physical state (0)
GID[  0]:               fe80:0000:0000:0003:0002:5500:1002:1b3d

port:   2
state:                  PORT_ACTIVE (4)
max_mtu:                2048 (4)
active_mtu:             2048 (4)
sm_lid:                 4
port_lid:               136
port_lmc:               0x02
max_msg_sz:             0x0
port_cap_flags:         0x00000000
max_vl_num:             0
bad_pkey_cntr:          0x0
qkey_viol_cntr:         0x0
sm_sl:                  0
pkey_tbl_len:           1
gid_tbl_len:            1
subnet_timeout:         8
init_type_reply:        0
active_width:           12X (8)
active_speed:           2.5 Gbps (1)
phys_state:             invalid physical state (0)
GID[  0]:               fe80:0000:0000:0002:0002:5500:1002:1b7d

The phys_state above does not correspond to what is in 
/sys/class/infiniband/ehca0/ports/1 

However, the "phys state" that ibstatus displays is indeed correct and as 
expected (see below).


ibstatus ehca0
Infiniband device 'ehca0' port 1 status:
        default gid:     fe80:0000:0000:0000:0002:5500:0000:933d
        base lid:        0xb
        sm lid:          0x2
        state:           4: ACTIVE
        phys state:      0: <unknown>
        rate:            30 Gb/sec (12X)

Infiniband device 'ehca0' port 2 status:
        default gid:     fe80:0000:0000:0000:0002:5500:0000:937d
        base lid:        0x7
        sm lid:          0x2
        state:           4: ACTIVE
        phys state:      0: <unknown>
        rate:            30 Gb/sec (12X)

The fix in dev_info.c for this problem is elementary (replace "invalid 
physical state" with "unknown"). Since the sources for this
program occurred in the examples directory I presumed that this was just a 
sample program written as an example. That
was why I asked if it was "supported" or not.

Pradeep
pradeep at us.ibm.com

Roland Dreier <rdreier at cisco.com> wrote on 10/05/2006 10:53:41 AM:

>     Pradeep> On eHCA we find that there are some discrepencies (for
>     Pradeep> example the phys_state) between the outputs of
>     Pradeep> "ibv_devinfo -v" and the corresponding output of
>     Pradeep> ibstatus. Indeed ibstatus does display what is in the
>     Pradeep> /sys/class/infiniband/* files, and as expected.
> 
> Could you give some details on the differences?  Is ibv_devinfo or
> ibstatus giving the correct output?
> 
>     Pradeep> I would like to understand the status of ibv_devinfo. Is
>     Pradeep> this a supported program -given that the sources for this
>     Pradeep> is in the example directory?  Also, I find the source
>     Pradeep> (devinfo.c) does appear in the OFED 1.0 tar ball.
> 
> I'm not sure what "supported" would mean exactly, but certainly I
> would like ibv_devinfo to work as well as possible.  Unfortunately I
> can't fix anything without a more detailed report...
> 
>  - R.
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