date: 2026-09-15T09:39:38Z
os: Darwin 25.2.0 arm64
macos: 26.2 (25C56)
cpu: Apple M4 Pro
logical cpus: 14
performance cores: 10  efficiency cores: 4  smt: none
P-core L1d: 131072 B  L2 (shared per cluster of 5): 16777216 B
E-core L1d: 65536 B  L2 (shared per cluster of 4): 4194304 B
cache line: 128 B  page: 16384 B  memory: 24 GiB
isa features: CRC32 FlagM FlagM2 FHM DotProd SHA3 RDM LSE SHA256 SHA512 SHA1 AES PMULL SB FRINTTS PACIMP LRCPC LRCPC2 FCMA JSCVT PAuth PAuth2 FPAC FPACCOMBINE DPB DPB2 BF16 I8MM WFxT RPRES ECV AFP LSE2 CSV2 CSV3 DIT FP16 BTI SME SME2 SME_F64F64 SME_I16I64 
power: 'AC Power'
load average at start: 10.50 8.47 8.13
frequency: not published by the vendor for this part; see estimated clock below
compiler: Apple clang version 17.0.0 (clang-1700.4.4.1)
uptime: 10:39  up 15 days, 20:55, 1 user, load averages: 10.50 8.47 8.13
estimated clock: 4.49 GHz (dependent 1-cycle add chain, 400000000 adds, min of 7 runs)
taskpolicy -c background: estimated clock: 1.04 GHz (dependent 1-cycle add chain, 400000000 adds, min of 7 runs)
bench: QUICK=0 REPS=default
---
adds per clock sample: 50000000
adds per clock bracket: 5000000 (one before and one after every FMA and stream sample)
fma array bytes: 16384
fma passes per sample: 2048
fma flops per sample: 268435456
stream array bytes: 67108864
reps: 15 (plus 1 warmup per kernel, discarded, after a 200 ms settling spin)
efficiency core cpu ids: 0-3 (hw.perflevel1.logicalcpu)
stream reference sum: 36034921960712949
RESULT stream_checksum 36034921960712949 sum
fma reference (sum of 64 lanes): 83960288.0
RESULT fma_checksum 83960288.0 sum
main_default: thread qos user-interactive, cpu ids seen 9,13, thread cpu share of wall 100.0% (median)
RESULT main_default_qos user-interactive class
RESULT main_default_cpus 9,13 ids
RESULT main_default_ecore_samples 0.0 percent
RESULT main_default_cpu_share 100.0 percent
main_default clock, wall time            min        0.222  median        0.222  max        0.225  cv   0.4%  n 15  ns/add
RESULT main_default_clock_ghz 4.511 GHz
RESULT main_default_clock_median_ghz 4.502 GHz
RESULT main_default_clock_cv 0.40 percent
main_default fma, wall time              min      135.699  median      144.139  max      144.349  cv   1.5%  n 15  GFLOP/s
RESULT main_default_fma_gflops 144.14 GFLOP/s
RESULT main_default_fma_cv 1.53 percent
main_default stream, wall time           min       50.489  median       82.233  max       86.849  cv  14.9%  n 15  GB/s
RESULT main_default_stream_gbps 82.23 GB/s
RESULT main_default_stream_cv 14.91 percent
main_default fma per cycle, wall time    min        3.838  median        3.999  max        4.034  cv   1.2%  n 15  FMA/cycle
RESULT main_default_fma_per_cycle 3.999 FMA/cycle
RESULT main_default_fma_per_cycle_cv 1.17 percent
main_default bytes per cycle, wall time  min       11.190  median       18.227  max       19.291  cv  15.0%  n 15  B/cycle
RESULT main_default_stream_bytes_per_cycle 18.23 B/cycle
RESULT main_default_stream_bytes_per_cycle_cv 15.03 percent
main_default clock, thread cpu time      min        0.222  median        0.222  max        0.225  cv   0.4%  n 15  ns/add
RESULT main_default_clock_cpu_ghz 4.511 GHz
RESULT main_default_clock_cpu_median_ghz 4.502 GHz
RESULT main_default_clock_cpu_cv 0.40 percent
main_default fma, thread cpu time        min      135.688  median      144.133  max      144.343  cv   1.5%  n 15  GFLOP/s
RESULT main_default_fma_cpu_gflops 144.13 GFLOP/s
RESULT main_default_fma_cpu_cv 1.53 percent
main_default stream, thread cpu time     min       50.478  median       82.195  max       86.480  cv  14.9%  n 15  GB/s
RESULT main_default_stream_cpu_gbps 82.20 GB/s
RESULT main_default_stream_cpu_cv 14.88 percent
main_default fma per cycle, thread cpu time min        3.844  median        3.999  max        4.034  cv   1.1%  n 15  FMA/cycle
RESULT main_default_fma_cpu_per_cycle 3.999 FMA/cycle
RESULT main_default_fma_cpu_per_cycle_cv 1.14 percent
main_default bytes per cycle, thread cpu time min       11.189  median       18.220  max       19.211  cv  15.0%  n 15  B/cycle
RESULT main_default_stream_cpu_bytes_per_cycle 18.22 B/cycle
RESULT main_default_stream_cpu_bytes_per_cycle_cv 14.98 percent
thread_default: thread qos default, cpu ids seen 10,12,13, thread cpu share of wall 100.0% (median)
RESULT thread_default_qos default class
RESULT thread_default_cpus 10,12,13 ids
RESULT thread_default_ecore_samples 0.0 percent
RESULT thread_default_cpu_share 100.0 percent
thread_default clock, wall time          min        0.222  median        0.223  max        0.230  cv   1.1%  n 15  ns/add
RESULT thread_default_clock_ghz 4.503 GHz
RESULT thread_default_clock_median_ghz 4.489 GHz
RESULT thread_default_clock_cv 1.05 percent
thread_default fma, wall time            min      142.130  median      143.965  max      144.362  cv   0.5%  n 15  GFLOP/s
RESULT thread_default_fma_gflops 143.97 GFLOP/s
RESULT thread_default_fma_cv 0.49 percent
thread_default stream, wall time         min       79.935  median       85.553  max       89.878  cv   2.9%  n 15  GB/s
RESULT thread_default_stream_gbps 85.55 GB/s
RESULT thread_default_stream_cv 2.95 percent
thread_default fma per cycle, wall time  min        3.947  median        4.015  max        4.043  cv   0.8%  n 15  FMA/cycle
RESULT thread_default_fma_per_cycle 4.015 FMA/cycle
RESULT thread_default_fma_per_cycle_cv 0.75 percent
thread_default bytes per cycle, wall time min       17.732  median       19.137  max       20.115  cv   2.9%  n 15  B/cycle
RESULT thread_default_stream_bytes_per_cycle 19.14 B/cycle
RESULT thread_default_stream_bytes_per_cycle_cv 2.85 percent
thread_default clock, thread cpu time    min        0.222  median        0.223  max        0.230  cv   1.0%  n 15  ns/add
RESULT thread_default_clock_cpu_ghz 4.507 GHz
RESULT thread_default_clock_cpu_median_ghz 4.489 GHz
RESULT thread_default_clock_cpu_cv 1.00 percent
thread_default fma, thread cpu time      min      142.117  median      143.953  max      144.353  cv   0.5%  n 15  GFLOP/s
RESULT thread_default_fma_cpu_gflops 143.95 GFLOP/s
RESULT thread_default_fma_cpu_cv 0.49 percent
thread_default stream, thread cpu time   min       79.907  median       85.534  max       89.838  cv   2.9%  n 15  GB/s
RESULT thread_default_stream_cpu_gbps 85.53 GB/s
RESULT thread_default_stream_cpu_cv 2.88 percent
thread_default fma per cycle, thread cpu time min        3.947  median        4.015  max        4.043  cv   0.8%  n 15  FMA/cycle
RESULT thread_default_fma_cpu_per_cycle 4.015 FMA/cycle
RESULT thread_default_fma_cpu_per_cycle_cv 0.75 percent
thread_default bytes per cycle, thread cpu time min       17.729  median       19.127  max       20.108  cv   2.7%  n 15  B/cycle
RESULT thread_default_stream_cpu_bytes_per_cycle 19.13 B/cycle
RESULT thread_default_stream_cpu_bytes_per_cycle_cv 2.73 percent
thread_background: thread qos background (QOS_CLASS_BACKGROUND requested), cpu ids seen 11,12, thread cpu share of wall 100.0% (median)
RESULT thread_background_qos background class
RESULT thread_background_cpus 11,12 ids
RESULT thread_background_ecore_samples 0.0 percent
RESULT thread_background_cpu_share 100.0 percent
thread_background clock, wall time       min        0.222  median        0.222  max        0.225  cv   0.4%  n 15  ns/add
RESULT thread_background_clock_ghz 4.509 GHz
RESULT thread_background_clock_median_ghz 4.497 GHz
RESULT thread_background_clock_cv 0.41 percent
thread_background fma, wall time         min      139.825  median      143.904  max      144.362  cv   1.0%  n 15  GFLOP/s
RESULT thread_background_fma_gflops 143.90 GFLOP/s
RESULT thread_background_fma_cv 1.04 percent
thread_background stream, wall time      min       82.515  median       84.114  max       86.975  cv   1.8%  n 15  GB/s
RESULT thread_background_stream_gbps 84.11 GB/s
RESULT thread_background_stream_cv 1.75 percent
thread_background fma per cycle, wall time min        3.922  median        4.000  max        4.076  cv   0.8%  n 15  FMA/cycle
RESULT thread_background_fma_per_cycle 4.000 FMA/cycle
RESULT thread_background_fma_per_cycle_cv 0.85 percent
thread_background bytes per cycle, wall time min       18.328  median       18.722  max       19.707  cv   2.1%  n 15  B/cycle
RESULT thread_background_stream_bytes_per_cycle 18.72 B/cycle
RESULT thread_background_stream_bytes_per_cycle_cv 2.13 percent
thread_background clock, thread cpu time min        0.222  median        0.222  max        0.225  cv   0.4%  n 15  ns/add
RESULT thread_background_clock_cpu_ghz 4.509 GHz
RESULT thread_background_clock_cpu_median_ghz 4.497 GHz
RESULT thread_background_clock_cpu_cv 0.41 percent
thread_background fma, thread cpu time   min      139.816  median      143.888  max      144.356  cv   1.0%  n 15  GFLOP/s
RESULT thread_background_fma_cpu_gflops 143.89 GFLOP/s
RESULT thread_background_fma_cpu_cv 1.04 percent
thread_background stream, thread cpu time min       82.490  median       84.053  max       86.952  cv   1.8%  n 15  GB/s
RESULT thread_background_stream_cpu_gbps 84.05 GB/s
RESULT thread_background_stream_cpu_cv 1.76 percent
thread_background fma per cycle, thread cpu time min        3.922  median        4.000  max        4.076  cv   0.8%  n 15  FMA/cycle
RESULT thread_background_fma_cpu_per_cycle 4.000 FMA/cycle
RESULT thread_background_fma_cpu_per_cycle_cv 0.85 percent
thread_background bytes per cycle, thread cpu time min       18.324  median       18.718  max       19.699  cv   2.1%  n 15  B/cycle
RESULT thread_background_stream_cpu_bytes_per_cycle 18.72 B/cycle
RESULT thread_background_stream_cpu_bytes_per_cycle_cv 2.13 percent
checksums: every sample matched its reference
--- MAIN_ONLY=1 MAIN_TAG=process_background taskpolicy -c background ./bench
adds per clock sample: 50000000
adds per clock bracket: 5000000 (one before and one after every FMA and stream sample)
fma array bytes: 16384
fma passes per sample: 2048
fma flops per sample: 268435456
stream array bytes: 67108864
reps: 15 (plus 1 warmup per kernel, discarded, after a 200 ms settling spin)
efficiency core cpu ids: 0-3 (hw.perflevel1.logicalcpu)
stream reference sum: 36034921960712949
RESULT stream_checksum 36034921960712949 sum
fma reference (sum of 64 lanes): 83960288.0
RESULT fma_checksum 83960288.0 sum
process_background: thread qos background, cpu ids seen 0,1,2,3, thread cpu share of wall 75.8% (median)
RESULT process_background_qos background class
RESULT process_background_cpus 0,1,2,3 ids
RESULT process_background_ecore_samples 100.0 percent
RESULT process_background_cpu_share 75.8 percent
process_background clock, wall time      min        0.718  median        1.358  max        2.072  cv  23.2%  n 15  ns/add
RESULT process_background_clock_ghz 1.393 GHz
RESULT process_background_clock_median_ghz 0.736 GHz
RESULT process_background_clock_cv 23.19 percent
process_background fma, wall time        min        5.419  median       12.003  max       19.022  cv  26.2%  n 15  GFLOP/s
RESULT process_background_fma_gflops 12.00 GFLOP/s
RESULT process_background_fma_cv 26.15 percent
process_background stream, wall time     min        2.518  median        8.372  max       12.777  cv  27.8%  n 15  GB/s
RESULT process_background_stream_gbps 8.37 GB/s
RESULT process_background_stream_cv 27.84 percent
process_background fma per cycle, wall time min        0.604  median        1.869  max        3.070  cv  29.3%  n 15  FMA/cycle
RESULT process_background_fma_per_cycle 1.869 FMA/cycle
RESULT process_background_fma_per_cycle_cv 29.33 percent
process_background bytes per cycle, wall time min        8.328  median       11.302  max       21.134  cv  29.4%  n 15  B/cycle
RESULT process_background_stream_bytes_per_cycle 11.30 B/cycle
RESULT process_background_stream_bytes_per_cycle_cv 29.40 percent
process_background clock, thread cpu time min        0.656  median        0.896  max        1.029  cv   9.8%  n 15  ns/add
RESULT process_background_clock_cpu_ghz 1.525 GHz
RESULT process_background_clock_cpu_median_ghz 1.116 GHz
RESULT process_background_clock_cpu_cv 9.81 percent
process_background fma, thread cpu time  min       15.596  median       15.997  max       25.580  cv  17.5%  n 15  GFLOP/s
RESULT process_background_fma_cpu_gflops 16.00 GFLOP/s
RESULT process_background_fma_cpu_cv 17.46 percent
process_background stream, thread cpu time min        9.834  median       10.933  max       12.860  cv   8.2%  n 15  GB/s
RESULT process_background_stream_cpu_gbps 10.93 GB/s
RESULT process_background_stream_cpu_cv 8.18 percent
process_background fma per cycle, thread cpu time min        1.605  median        1.974  max        2.993  cv  17.6%  n 15  FMA/cycle
RESULT process_background_fma_cpu_per_cycle 1.974 FMA/cycle
RESULT process_background_fma_cpu_per_cycle_cv 17.56 percent
process_background bytes per cycle, thread cpu time min        7.887  median       10.625  max       12.937  cv  13.4%  n 15  B/cycle
RESULT process_background_stream_cpu_bytes_per_cycle 10.63 B/cycle
RESULT process_background_stream_cpu_bytes_per_cycle_cv 13.36 percent
checksums: every sample matched its reference
