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| author | Andreas Klebinger <klebinger.andreas@gmx.at> | 2020-07-11 06:37:12 -0400 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2020-12-22 22:10:06 -0500 |
| commit | 553c59ca5581bcba79ea7d9672cffd438905d846 (patch) | |
| tree | 5484c37ffdef7266ae91166a642d83461965493e /rts/RtsFlags.c | |
| parent | 4c3fae472c0223dbbf8062cd7ab1e24b3e9c01c6 (diff) | |
| download | haskell-553c59ca5581bcba79ea7d9672cffd438905d846.tar.gz | |
Increase -A default to 4MB.
This gives a small increase in performance under most circumstances.
For single threaded GC the improvement is on the order of 1-2%.
For multi threaded GC the results are quite noisy but seem to
fall into the same ballpark.
Fixes #16499
Diffstat (limited to 'rts/RtsFlags.c')
| -rw-r--r-- | rts/RtsFlags.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/rts/RtsFlags.c b/rts/RtsFlags.c index b23b19752b..044e7742c4 100644 --- a/rts/RtsFlags.c +++ b/rts/RtsFlags.c @@ -153,10 +153,11 @@ void initRtsFlagsDefaults(void) RtsFlags.GcFlags.stkChunkSize = (32 * 1024) / sizeof(W_); RtsFlags.GcFlags.stkChunkBufferSize = (1 * 1024) / sizeof(W_); - RtsFlags.GcFlags.minAllocAreaSize = (1024 * 1024) / BLOCK_SIZE; + /* -A default. See #16499 for a discussion about the tradeoffs */ + RtsFlags.GcFlags.minAllocAreaSize = (4 * 1024 * 1024) / BLOCK_SIZE; RtsFlags.GcFlags.largeAllocLim = 0; /* defaults to minAllocAreasize */ RtsFlags.GcFlags.nurseryChunkSize = 0; - RtsFlags.GcFlags.minOldGenSize = (1024 * 1024) / BLOCK_SIZE; + RtsFlags.GcFlags.minOldGenSize = (1024 * 1024) / BLOCK_SIZE; /* -O default */ RtsFlags.GcFlags.maxHeapSize = 0; /* off by default */ RtsFlags.GcFlags.heapLimitGrace = (1024 * 1024); RtsFlags.GcFlags.heapSizeSuggestion = 0; /* none */ |