Files
Jungfraujoch/common/CUDAWrapper.cpp
T
leonarski_f cc925b2668
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Remove NUMAHWPolicy and the libnuma dependency
NUMA CPU/memory pinning is no longer worthwhile: the FPGA DMA buffers are
placed device-local by the kernel (dma_alloc_coherent), the big RAM ring
buffer is random-access (first-touch handles placement), and GPU work is
already spread across all visible devices. So drop the pinning entirely
and with it libnuma.

- Delete NUMAHWPolicy; the only concern worth keeping - GPU selection -
  is done directly via pin_gpu() (round-robin over visible GPUs) in the
  indexer pool and the Lite analysis threads. CPU-only threads
  (FPGA acquire/pedestal/summation/frame-transform) no longer bind
  anything.
- Drop get_gpu_numa_node() (sysfs lookup) - only SelectGPUAndItsNUMA
  used it.
- numa_policy broker setting is deprecated and ignored (kept in the API
  for backward compatibility; warns once on startup).
- Remove NUMA_LIBRARY / numa.h / numaif.h detection from CMake.
- Docs: drop the NUMA dependency, remove the numa_policy config example,
  and document running multiple brokers on disjoint GPUs via
  CUDA_VISIBLE_DEVICES.
- Remove NUMA_GPU_REVIEW.md (the planning note; this work is now done).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-06-17 20:25:36 +02:00

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C++

// SPDX-FileCopyrightText: 2024 Filip Leonarski, Paul Scherrer Institute <filip.leonarski@psi.ch>
// SPDX-License-Identifier: GPL-3.0-only
#ifndef JFJOCH_USE_CUDA
#include "CUDAWrapper.h"
int32_t get_gpu_count() {
return 0;
}
void set_gpu(int32_t dev_id) {}
void pin_gpu() {}
#endif