The CPU-only image loop is DRAM-bound on 16M frames: decode, preprocess, the adaptive finder's plain
ring pass and FlagRings each streamed the whole frame through memory.
- JFJochDecompressHperfBlocks hands each decoded bitshuffle block to a callback; with no output
buffer the block is unshuffled into a reused block-sized scratch (JFJochDecompressBlocks).
- MXAnalysisWithoutFPGA::PreprocessCPU preprocesses each block into the int32 buffer
(ImagePreprocessorCPU::AnalyzeBlock) and, when the fused CPU finder runs, puts it through the plain
ring pass + fused azint (AdaptiveSpotFinderCPU::AccumulateRingsBlock) while it is in cache. Detect()
then starts from those sums. The per-worker decompression buffer is no longer allocated for
bitshuffled data.
- FlagRings becomes FlagRow, called by DetectAt's first pass for row y+NBX just before that row enters
the vertical sums; first_pass_needed is marked from each row's candidates at the same point.
Exact: blocks arrive in pixel order, so the float azint sums see the same pixels in the same order;
the per-pixel expressions are unchanged; everything else is integer. p.hkl, p.mtz, p_P1.mtz and
p_unmerged.mtz byte-identical to rc173 on myob, cytc, lyso, sparse (CPU-only build), GPU myob
identical (the GPU path does not take this route).
CPU-only, 32 workers, under the gpulock on a shared (loaded) machine, base -> fused, two rounds
(second in reversed order):
myob 155.9 -> 97.7 s, 139.9 -> 88.1 s (loop 46.1 -> 26.8 s/pass; user 3690 -> 2221 s)
cytc 220.8 -> 156.6 s, 216.6 -> 155.1 s (user 5160 -> 4128 s)
lyso 134.5 -> 123.3 s, 69.5 -> 64.8 s
peak RSS myob 15.2 -> 10.8 GB, cytc 12.6 -> 10.4 GB, lyso 7.0 -> 6.7 GB
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01D1G8gJVAy6gp1K5Dz3NE5C
leonarski_fandClaude Opus 5.5
9c5141c7c0