AMD MXFP4 GEMM
Block-scaled MXFP4 matrix multiply for MI355X: quantize bf16 A (m×k) to MXFP4 per-1x32 blocks, then an a4w4 GEMM against pre-quantized MXFP4 B (n×k), producing bf16 C (m×n); m, n, k are divisible by 64. B also arrives pre-shuffled to (16,16) tiles together with a row-padded E8M0 scale tensor for the CK kernel.
Reported evidence · last observed 2026-04-04. Reported by source; not independently reproduced. License unknown.
Current records
Not measured on H100, B200 for this workload. Challenges →
1submission 728835bhagawan-yantrion4.35µs1.00×Reported · license unknown · source2026-04-04stale
Measured exactly what you asked. Reported by source; not independently reproduced.
2submission 728109bhagawan-yantrion5.33µs1.22×Reported · license unknown · source2026-04-04stale
Measured exactly what you asked. Reported by source; not independently reproduced.
3submission 732442josusanmartin7.59µs1.74×Reported · license unknown · source2026-04-05
Measured exactly what you asked. Reported by source; not independently reproduced.
4submission 748144ftyghome7.70µs1.77×Reported · license unknown · source2026-04-06
Measured exactly what you asked. Reported by source; not independently reproduced.
5submission 740392ftyghome7.71µs1.77×Reported · license unknown · source2026-04-05
Measured exactly what you asked. Reported by source; not independently reproduced.
6submission 734957ftyghome7.73µs1.78×Reported · license unknown · source2026-04-05
Measured exactly what you asked. Reported by source; not independently reproduced.
7submission 706161ftyghome7.80µs1.79×Reported · license unknown · source2026-04-03stale
Measured exactly what you asked. Reported by source; not independently reproduced.
8submission 737364divc137.88µs1.81×Reported · license unknown · source2026-04-05
Measured exactly what you asked. Reported by source; not independently reproduced.
9submission 746766div227.89µs1.81×Reported · license unknown · source2026-04-06
Measured exactly what you asked. Reported by source; not independently reproduced.
10submission 751660guojun217.91µs1.82×Reported · license unknown · source2026-04-06
Measured exactly what you asked. Reported by source; not independently reproduced.
11submission 747144rosehulman.7.93µs1.82×Reported · license unknown · source2026-04-06
Measured exactly what you asked. Reported by source; not independently reproduced.
12submission 754952bigmodel_wuzhigang7.93µs1.82×Reported · license unknown · source2026-04-07
Measured exactly what you asked. Reported by source; not independently reproduced.
13submission 755134colorswind7.94µs1.82×Reported · license unknown · source2026-04-07
Measured exactly what you asked. Reported by source; not independently reproduced.
14submission 750153guojun217.98µs1.83×Reported · license unknown · source2026-04-06
Measured exactly what you asked. Reported by source; not independently reproduced.
15submission 754549flower21237.99µs1.84×Reported · license unknown · source2026-04-07
Measured exactly what you asked. Reported by source; not independently reproduced.
16submission 754280Hamza8.00µs1.84×Reported · license unknown · source2026-04-07
Measured exactly what you asked. Reported by source; not independently reproduced.
17submission 754951dc13128.03µs1.84×Reported · license unknown · source2026-04-07
Measured exactly what you asked. Reported by source; not independently reproduced.
18submission 755142Danishlynx8.04µs1.85×Reported · license unknown · source2026-04-07
Measured exactly what you asked. Reported by source; not independently reproduced.
19submission 753968vuxml8.07µs1.85×Reported · license unknown · source2026-04-07
Measured exactly what you asked. Reported by source; not independently reproduced.
20submission 610968Ananda Sai A8.09µs1.86×Reported · license unknown · source2026-03-22stale
Measured exactly what you asked. Reported by source; not independently reproduced.
21submission 730077johnny.t.shi8.09µs1.86×Reported · license unknown · source2026-04-05stale
Measured exactly what you asked. Reported by source; not independently reproduced.
22submission 747088guojun218.10µs1.86×Reported · license unknown · source2026-04-06
Measured exactly what you asked. Reported by source; not independently reproduced.
23submission 746351rosehulman.8.10µs1.86×Reported · license unknown · source2026-04-06
Measured exactly what you asked. Reported by source; not independently reproduced.
24submission 754367flower21238.10µs1.86×Reported · license unknown · source2026-04-07
Measured exactly what you asked. Reported by source; not independently reproduced.
25submission 754569.jonnss8.10µs1.86×Reported · license unknown · source2026-04-07
Measured exactly what you asked. Reported by source; not independently reproduced.
26submission 751752vuxml8.11µs1.86×Reported · license unknown · source2026-04-06
Measured exactly what you asked. Reported by source; not independently reproduced.
27submission 688863ftyghome8.12µs1.87×Reported · license unknown · source2026-04-01stale
Measured exactly what you asked. Reported by source; not independently reproduced.
28submission 750036vuxml8.14µs1.87×Reported · license unknown · source2026-04-06
Measured exactly what you asked. Reported by source; not independently reproduced.
29submission 748756NinoHeather8.14µs1.87×Reported · license unknown · source2026-04-06
Measured exactly what you asked. Reported by source; not independently reproduced.
30submission 755056sean_nobricks8.15µs1.87×Reported · license unknown · source2026-04-07
Measured exactly what you asked. Reported by source; not independently reproduced.
31submission 665985mmk1508.15µs1.87×Reported · license unknown · source2026-03-29stale
Measured exactly what you asked. Reported by source; not independently reproduced.
32submission 740115LunNova8.16µs1.87×Reported · license unknown · source2026-04-05
Measured exactly what you asked. Reported by source; not independently reproduced.
33submission 686042ftyghome8.16µs1.87×Reported · license unknown · source2026-04-01stale
Measured exactly what you asked. Reported by source; not independently reproduced.
34submission 655819ftyghome8.17µs1.88×Reported · license unknown · source2026-03-28stale
Measured exactly what you asked. Reported by source; not independently reproduced.
35submission 650401div228.17µs1.88×Reported · license unknown · source2026-03-27stale
Measured exactly what you asked. Reported by source; not independently reproduced.
36submission 745428guojun218.17µs1.88×Reported · license unknown · source2026-04-06
Measured exactly what you asked. Reported by source; not independently reproduced.
37submission 610679Ananda Sai A8.18µs1.88×Reported · license unknown · source2026-03-22stale
Measured exactly what you asked. Reported by source; not independently reproduced.
38submission 743219rosehulman.8.18µs1.88×Reported · license unknown · source2026-04-06
Measured exactly what you asked. Reported by source; not independently reproduced.
39submission 750727sean_nobricks8.18µs1.88×Reported · license unknown · source2026-04-06
Measured exactly what you asked. Reported by source; not independently reproduced.
40submission 717166willfisher8.18µs1.88×Reported · license unknown · source2026-04-03stale
Measured exactly what you asked. Reported by source; not independently reproduced.
41submission 748314vuxml8.19µs1.88×Reported · license unknown · source2026-04-06
Measured exactly what you asked. Reported by source; not independently reproduced.
42submission 683627NinoHeather8.20µs1.88×Reported · license unknown · source2026-04-01stale
Measured exactly what you asked. Reported by source; not independently reproduced.
43submission 752099bigmodel_wuzhigang8.21µs1.88×Reported · license unknown · source2026-04-06
Measured exactly what you asked. Reported by source; not independently reproduced.
44submission 741643vuxml8.21µs1.89×Reported · license unknown · source2026-04-05
Measured exactly what you asked. Reported by source; not independently reproduced.
45submission 753653Kernel-Zhang8.21µs1.89×Reported · license unknown · source2026-04-06
Measured exactly what you asked. Reported by source; not independently reproduced.
46submission 649250ftyghome8.22µs1.89×Reported · license unknown · source2026-03-27stale
Measured exactly what you asked. Reported by source; not independently reproduced.
47submission 570051parcadei8.23µs1.89×Reported · license unknown · source2026-03-16stale
Measured exactly what you asked. Reported by source; not independently reproduced.
48submission 673831John Hahn8.23µs1.89×Reported · license unknown · source2026-03-30stale
Measured exactly what you asked. Reported by source; not independently reproduced.
49submission 608963Ananda Sai A8.23µs1.89×Reported · license unknown · source2026-03-22stale
Measured exactly what you asked. Reported by source; not independently reproduced.
50submission 735689rosehulman.8.23µs1.89×Reported · license unknown · source2026-04-05
Measured exactly what you asked. Reported by source; not independently reproduced.
51submission 755166Will Fisher8.26µs1.90×Reported · license unknown · source2026-04-07
Measured exactly what you asked. Reported by source; not independently reproduced.
52submission 608798Ananda Sai A8.28µs1.90×Reported · license unknown · source2026-03-22stale
Measured exactly what you asked. Reported by source; not independently reproduced.
53submission 754770Brian Sun8.31µs1.91×Reported · license unknown · source2026-04-07
Measured exactly what you asked. Reported by source; not independently reproduced.
54submission 755178Danny Estenberg8.32µs1.91×Reported · license unknown · source2026-04-07
Measured exactly what you asked. Reported by source; not independently reproduced.
55submission 729970aswinkumar8.32µs1.91×Reported · license unknown · source2026-04-05stale
Measured exactly what you asked. Reported by source; not independently reproduced.
56submission 745811Brian Sun8.35µs1.92×Reported · license unknown · no source2026-04-06
Measured exactly what you asked. Reported by source; not independently reproduced.
57submission 710544jd-bartlett968.36µs1.92×Reported · license unknown · source2026-04-03stale
Measured exactly what you asked. Reported by source; not independently reproduced.
58submission 734852rosehulman.8.36µs1.92×Reported · license unknown · source2026-04-05
Measured exactly what you asked. Reported by source; not independently reproduced.
59submission 651898mmk1508.36µs1.92×Reported · license unknown · source2026-03-28stale
Measured exactly what you asked. Reported by source; not independently reproduced.
60submission 647149npip998.39µs1.93×Reported · license unknown · source2026-03-27stale
Measured exactly what you asked. Reported by source; not independently reproduced.
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