Hello,
I'm running the hpl benchmark with the latest Chapel release 1.15 on
multi-locale. It's running OK on 2,4,8,16 nodes, until 32 nodes, where it
reports the error:
*** FATAL ERROR: GASNet Extended API: Too many simultaneous local client
threads (limit=256). To raise this limit, configure GASNet using
--with-max-pthreads-per-node=N.
Is it reasonable to have this error when running on 32 nodes? I read this
http://chapel.cray.com/docs/1.15/usingchapel/tasks.html#id2 In order to
run it on 32 nodes, shall I set CHPL_RT_NUM_THREADS_PER_LOCALE and rebuild
Chapel? Or in what other way? Thanks
Here's my env:
CHPL_TARGET_PLATFORM: linux64
CHPL_TARGET_COMPILER: gnu
CHPL_TARGET_ARCH: native *
CHPL_LOCALE_MODEL: flat
CHPL_COMM: gasnet *
CHPL_COMM_SUBSTRATE: ibv *
CHPL_GASNET_SEGMENT: large
CHPL_TASKS: fifo *
CHPL_LAUNCHER: gasnetrun_ibv *
CHPL_TIMERS: generic
CHPL_UNWIND: none
CHPL_MEM: jemalloc
CHPL_MAKE: gmake
CHPL_ATOMICS: intrinsics
CHPL_NETWORK_ATOMICS: none
CHPL_GMP: gmp
CHPL_HWLOC: none
CHPL_REGEXP: re2
CHPL_WIDE_POINTERS: struct
CHPL_AUX_FILESYS: none
​Besides, I'm a little confused of "local" statement. According to
http://chapel.cray.com/docs/1.15/technotes/local.html?highlight=local, is
it just used to assert the communication free statements in the block? Or
it's used as an performance optimization?
Thanks
--
Best regards
Hui Zhang
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