Davis, Arlin R wrote:
Jie,
A question on implementation multi-rail with uDAPL connections.
What I did is open 2 IAs (corresponding to the 2 ports on
HCAs) on each
node.
Then create one EP for each IA, and connect those EPs to the
corresponding
EP at other node.
Then data been transferred via both EP-connections.
Did you verify data flow is across independent HCA channels
using perfquery?
I have using perfquery to verified that data has been transmit
through both channel. The ourput for perfquery is:
############# Before data transfer: #############
# Port counters: Lid 8 port 1
PortSelect:......................1
CounterSelect:...................0x0000
LinkDowned:......................2
XmtDiscards:.....................39
XmtData:.........................4294967295
RcvData:.........................20456971
XmtPkts:.........................112151685
RcvPkts:.........................2372783
# Port counters: Lid 9 port 2
PortSelect:......................2
CounterSelect:...................0x0000
LinkDowned:......................1
XmtDiscards:.....................21
XmtData:.........................4294967295
RcvData:.........................7123011
XmtPkts:.........................62927413
RcvPkts:.........................896106
############# After data transfer: #############
# Port counters: Lid 8 port 1
PortSelect:......................1
CounterSelect:...................0x0000
LinkDowned:......................2
XmtDiscards:.....................39
XmtData:.........................4294967295
RcvData:.........................20457865
XmtPkts:.........................112168095
RcvPkts:.........................2372882
# Port counters: Lid 9 port 2
PortSelect:......................2
CounterSelect:...................0x0000
LinkDowned:......................1
XmtDiscards:.....................21
XmtData:.........................4294967295
RcvData:.........................7123912
XmtPkts:.........................62943824
RcvPkts:.........................896206
Difference in XmtPkts of port1 is 16410, and the difference for port 2
is 16411.
Does this suggest that around similar size of data has been transfered
through both rails?
I have been notice that there's a MULTIPATH connection flag for dapl,
but I did
not use it. What's the use of it?
Multipath is not supported at this time.
I will roll up a uDAPL test and see if I can verify performance.
-arlin
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