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| author | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-10-19 17:13:31 -0400 |
|---|---|---|
| committer | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-10-19 19:23:21 -0400 |
| commit | 81f099f461082a40eb2ea49cbce7f5b28caaf1ee (patch) | |
| tree | 286e44e6c40acd68d18cbd6e32fcece183623dce /BIGPATH-REPORT.md | |
| parent | 158cc6da93e4cece1d93eb454393396537f92ef1 (diff) | |
| download | open-iov-81f099f461082a40eb2ea49cbce7f5b28caaf1ee.tar.gz open-iov-81f099f461082a40eb2ea49cbce7f5b28caaf1ee.zip | |
vgsp: fail4 - definitive rec-content witness (data[0..2] first8 at the rec hpa)
r295 measurement: rec[0] va=0x72a93cc00000 hpa=0x119155000 first8=43100000
43108000 = floats 144.0 144.5 = a[524288..524289] - i.e. the first
A-rec's backing page already holds the +2 MB data, before copy-in.
Chained with the r285 upload witnesses (the H2D op sources read the
other buffer's chunk-2/3 data), the +2 MB phase originates on the
HOST-BUFFER side of the uploads (the pinned/staged source resolution
for the client's host buffers), not in the GMMU walk (verified
correct against the driver's own format: PD3[48:47]/PD2[46:38]/
PD1[37:29]/PD0[28:21]/PT[20:12]).
Diffstat (limited to 'BIGPATH-REPORT.md')
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