Comments (2)
Adding a debug statement indicates there is a flurry of CmiPushPE
activity immediately before the hang:
❯ ./bin/pgm_cbench_benchmark +p2 -r 256
Charm++: standalone mode (not using charmrun)
Charm++> Running in SMP mode: 1 processes, 2 worker threads (PEs) + 1 comm threads per process, 2 PEs total
Charm++> The comm. thread both sends and receives messages
Converse/Charm++ Commit ID: v7.1.0-devel-122-g064b48915
Charm++ built with internal error checking enabled.
Do not use for performance benchmarking (build without --enable-error-checking to do so).
Charm++> Using STL-based msgQ:
Charm++> Message priorities have been turned off and will not be respected.
Charm++> scheduler running in netpoll mode.
main> rep 1 of 384
rk1> sending 0x600003d78010 to rk0.
rk0> received msg 0x600003d78010
rk1> sending 0x600003b74010 to rk0.
rk0> received msg 0x600003b74010
rk0> sending 0x600003d7c010 to rk1.
rk1> received msg 0x600003d7c010
rk0> sending 0x600003d7c010 to rk1.
rk1> received msg 0x600003d7c010
^C
The flow looks mostly normal, however, one message is repeated. Most likely, a harmless byproduct of message pooling.
UPDATE: This is reproducible regardless of whether CmiPushPE
or CmiSyncSend
is used.
from charmlite.
It seems like the problem is that a control message for the system_detector_
is buffered before the object is created.
❯ ./bin/pgm_cbench_benchmark +p2 -r 256
Charm++: standalone mode (not using charmrun)
Charm++> Running in SMP mode: 1 processes, 2 worker threads (PEs) + 1 comm threads per process, 2 PEs total
Charm++> The comm. thread both sends and receives messages
Converse/Charm++ Commit ID: v7.1.0-devel-122-g064b48915
Charm++ built with internal error checking enabled.
Do not use for performance benchmarking (build without --enable-error-checking to do so).
Charm++> Using STL-based msgQ:
Charm++> Message priorities have been turned off and will not be respected.
Charm++> scheduler running in netpoll mode.
main> rep 1 of 384
pe0> buffering message for {0, 0}
pe0> buffering message for {0, 0}
pe0> buffering message for {-1, 0}
In a normal run, the output looks like:
❯ ./bin/pgm_cbench_benchmark +p2 -r 256 build -> main ? ! $
Charm++: standalone mode (not using charmrun)
Charm++> Running in SMP mode: 1 processes, 2 worker threads (PEs) + 1 comm threads per process, 2 PEs total
Charm++> The comm. thread both sends and receives messages
Converse/Charm++ Commit ID: v7.1.0-devel-122-g064b48915
Charm++ built with internal error checking enabled.
Do not use for performance benchmarking (build without --enable-error-checking to do so).
Charm++> Using STL-based msgQ:
Charm++> Message priorities have been turned off and will not be respected.
Charm++> scheduler running in netpoll mode.
main> rep 1 of 384
pe0> buffering message for {0, 0}
main> rep 2 of 384
main> rep 3 of 384
from charmlite.
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