experiment=ch15_channels_chunks_buffers
run_id=20260710T191306Z
timestamp_utc=2026-07-10T19:17:35.366714+00:00
hostname=sg-fuxc2-260708-12652-default0-0
world_size=4
algorithm=Ring
protocol=Simple
cycles=10
iterations=20
process_configs=44
measurement_rows=1060
nsys_profiles=7
private_nsys_dir=/root/nccl-learning/private/ch15_pipeline/20260710T191306Z
nccl_tests_commit=5bcd45d2ee8365e37895e118c9d11b0ebc15aa69
nccl_source_commit=178b6b759074597777ce13438efb0e0ba625e429
command_01=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=1 NCCL_MAX_NCHANNELS=1 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 4K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_02=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=2 NCCL_MAX_NCHANNELS=2 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 4K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_03=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=4 NCCL_MAX_NCHANNELS=4 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 4K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_04=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=8 NCCL_MAX_NCHANNELS=8 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 4K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_05=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 4K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_06=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=65536 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_07=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=262144 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_08=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=1048576 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_09=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_10=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=16777216 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_11=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=64 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 4K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_12=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=128 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 4K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_13=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=256 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 4K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_14=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 4K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_15=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=2 NCCL_MAX_NCHANNELS=2 NCCL_BUFFSIZE=262144 NCCL_NTHREADS=128 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_16=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=2 NCCL_MAX_NCHANNELS=2 NCCL_BUFFSIZE=262144 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_17=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=2 NCCL_MAX_NCHANNELS=2 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=128 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_18=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=2 NCCL_MAX_NCHANNELS=2 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_19=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=262144 NCCL_NTHREADS=128 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_20=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=262144 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_21=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=128 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_22=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_23=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_24=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=128 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_25=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=262144 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_26=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=262144 NCCL_NTHREADS=128 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_27=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=2 NCCL_MAX_NCHANNELS=2 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_28=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=2 NCCL_MAX_NCHANNELS=2 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=128 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_29=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=2 NCCL_MAX_NCHANNELS=2 NCCL_BUFFSIZE=262144 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_30=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=2 NCCL_MAX_NCHANNELS=2 NCCL_BUFFSIZE=262144 NCCL_NTHREADS=128 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_31=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 4K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_32=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=256 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 4K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_33=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=128 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 4K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_34=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=64 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 4K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_35=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=16777216 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_36=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_37=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=1048576 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_38=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=262144 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_39=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=65536 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 512K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_40=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=12 NCCL_MAX_NCHANNELS=12 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 4K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_41=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=8 NCCL_MAX_NCHANNELS=8 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 4K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_42=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=4 NCCL_MAX_NCHANNELS=4 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 4K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_43=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=2 NCCL_MAX_NCHANNELS=2 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 4K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum
command_44=NCCL_ALGO=Ring NCCL_PROTO=Simple NCCL_MIN_NCHANNELS=1 NCCL_MAX_NCHANNELS=1 NCCL_BUFFSIZE=4194304 NCCL_NTHREADS=512 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 4K -e 64M -f 128 -g 4 -w 5 -n 20 -N 10 -c 1 -I 0 -z 0 -u 0 -C 0 -a 3 -d float -o sum