leonarski_fandClaude Opus 5
4bac6d3f21
GetRawImage() allocated a fresh JFJochReaderRawImage per frame, and on a miniCBF sweep its buffer holds the whole decoded image: 72.6 MB on a 4150 x 4371 detector. That is over glibc's 32 MB mmap ceiling, so the block is mmapped and munmapped every image and the decoder faults in 17 700 untouched pages as it writes them. Measured on one 18.1 Mpx frame, decoding into a fresh buffer takes 61 ms against 16 ms into one that has been written before - the allocation costs nearly three times what the decode does, and the per-image loop pays it twice per sweep. ReadRawImage() fills a raw image the caller owns, so a worker declares one outside its loop and keeps the pages. GetRawImage() stays as the allocating wrapper for the single-image callers. The two loops that hand the image to the process-file writer keep a shared_ptr and recycle it only while the writer thread is not still reading the previous frame's pixels. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Jungfraujoch
Application to receive data from the PSI JUNGFRAU and EIGER detectors.
All documentation is now placed in docs/ subdirectory and for the current version hosted on Jungfraujoch Read The Docs page.