Hi.
lbt wrote:
Hi,
I'm trying out APM with OFED 1.2 , using Mellanox dual-port HCA
(ib_mthca driver). When I have several RCQP's that I am trying to
migrate (software triggered migration using ib_modify_qp), I've
noticed that sometimes 1 or 2 of the remote QP's never generate an
IB_EVENT_PATH_MIG or even an IB_EVENT_PATH_MIG_ERR ... it seems that
it just gets lost. I looked through some of the ib_mthca patches in
git.kernel.org/?p=linux/kernel/git/roland/infiniband.git
<http://git.kernel.org/?p=linux/kernel/git/roland/infiniband.git>, and
incorporated the mmiowb patch for ib_mthca commands
(http://git.kernel.org/?p=linux/kernel/git/roland/infiniband.git;a=commit;h=76d7cc0345a037e8eea426f8abc710abd22946dd
<http://git.kernel.org/?p=linux/kernel/git/roland/infiniband.git;a=commit;h=76d7cc0345a037e8eea426f8abc710abd22946dd>).
But still seeing same issue. I have a test case that repeates
software-triggered migrations + rearming in a loop, and this problem
usually occurs in the first few cycles, but is not too frequent. If
anyone has any ideas on what might be wrong, or tips on where I can
look/do to debug this, that would be very much appreciated!
For example, this is the console output I will see (printed out by our
rcqp event handler):
On the local end - initiates software triggered migration, using
ib_modify_qp:
Event IB_EVENT_PATH_MIG occurred on QP#1043
Event IB_EVENT_PATH_MIG occurred on QP#1040
Event IB_EVENT_PATH_MIG occurred on QP#1033
On the remote end:
Event IB_EVENT_PATH_MIG occurred on QP#1040
Event IB_EVENT_PATH_MIG occurred on QP#1043
Is
the timeout value (in the QP attributes) is 0?
If the answer is no, can you please supply some more details on this?
thanks
Dotan
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