Historical tool output | archived output | JSONL line 5632 | 2026-09-07T16:22:36.109Z

=== small-message all_reduce latency (8B .. 1MB), 2 ranks / 2 nodes ===
#                                                              out-of-place                       in-place
#       size         count      type   redop    root     time   algbw   busbw  #wrong     time   algbw   busbw  #wrong
#        (B)    (elements)                               (us)  (GB/s)  (GB/s)             (us)  (GB/s)  (GB/s)        
           8             2     float     sum      -1    25.37    0.00    0.00       0    22.10    0.00    0.00       0
          32             8     float     sum      -1    22.85    0.00    0.00       0    22.59    0.00    0.00       0
         128            32     float     sum      -1    22.90    0.01    0.01       0    22.47    0.01    0.01       0
         512           128     float     sum      -1    23.23    0.02    0.02       0    22.94    0.02    0.02       0
        2048           512     float     sum      -1    24.09    0.09    0.09       0    23.78    0.09    0.09       0
        8192          2048     float     sum      -1    26.94    0.30    0.30       0    26.65    0.31    0.31       0
       32768          8192     float     sum      -1    36.86    0.89    0.89       0    37.07    0.88    0.88       0
      131072         32768     float     sum      -1    77.05    1.70    1.70       0    60.44    2.17    2.17       0
      524288        131072     float     sum      -1   460.07    1.14    1.14       0   349.97    1.50    1.50       0
# Out of bounds values : 0 OK
# Avg bus bandwidth    : 0.506792 
#
# Collective test concluded: all_reduce_perf
#