experiment=ch09_benchmark_methodology run_id=20260710T150350Z started_at_utc=2026-07-10T15:03:50.473246+00:00 completed_at_utc=2026-07-10T15:08:19.973598+00:00 hostname=sg-fuxc2-260708-12652-default0-0 kernel=5.15.0-177-generic cycles=10 total_measurement_rows=920 sizes=1M,64M world_size=4 gpu_affinity=all GPUs on NUMA0; CPU0 NUMA0; CPU1 NUMA1 nccl_tests_commit=5bcd45d2ee8365e37895e118c9d11b0ebc15aa69 nccl_source_commit=178b6b759074597777ce13438efb0e0ba625e429 command_01=taskset -c 0 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 1M -e 64M -f 64 -g 4 -w 0 -n 20 -N 10 -c 1 -I 1 -z 0 -d float -o sum -a 3 -C 0 command_02=taskset -c 0 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 1M -e 64M -f 64 -g 4 -w 1 -n 20 -N 10 -c 1 -I 1 -z 0 -d float -o sum -a 3 -C 0 command_03=taskset -c 0 /root/nccl-learning/third_party/nccl-tests/build/all_reduce_perf -b 1M -e 64M -f 64 -g 4 -w 5 -n 20 -N 10 -c 1 -I 1 -z 0 -d float -o sum -a 3 -C 0 command_04=taskset -c 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