diff options
| author | Tayler Hetherington <[email protected]> | 2013-06-17 15:05:14 -0800 |
|---|---|---|
| committer | Andrew Boktor <[email protected]> | 2014-08-14 13:50:47 -0700 |
| commit | d79fab8098036dcad4628c21d61258195721e2a2 (patch) | |
| tree | a0967e13942bd7ca6e9d53e61d1294b25bff5af0 /CHANGES | |
| parent | 564de5650af4e54b02f954f47c363ca1da7732f9 (diff) | |
Review: 46001. Fixing a source of non-determinism in GPGPU-Sim (Bug 174). Not sure if this is the only issue, but this was definitely a source of non-determinism (checked with many of the <rodinia>-FT benchmarks). In gpgpu_sim_thread_concurrent() (gpgpusim_entrypoint.cc), the inner do{...}while(active); only breaks when the gpu is not active. As a result, the gpu is only initialized when the gpu becomes momentarily inactive. If one kernel completes while another kernel is currently pending in the stream's queue, the next kernel will start running immediately causing the GPU to not be reinitialized (which includes resetting per-kernel stats). The fix simply recognizes that a kernel has completed and breaks from the loop prior to starting the next operation.
[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 16463]
Diffstat (limited to 'CHANGES')
| -rw-r--r-- | CHANGES | 1 |
1 files changed, 1 insertions, 0 deletions
@@ -38,6 +38,7 @@ Version 3.2.1+edits (development branch) versus 3.2.1 - Average/min/max per-kernel powers not being reset at kernel boundaries causing incorrect per-kernel values. - Fixed a dependency error in the src/cuda-sim Makefile. + - Fixing a source of non-determinism in GPGPU-Sim (Bug 147). Version 3.2.1 versus 3.2.0 - Added kernel name and launch uids to performance statistics log. |