diff options
| author | Simon Marlow <marlowsd@gmail.com> | 2009-03-13 13:51:16 +0000 |
|---|---|---|
| committer | Simon Marlow <marlowsd@gmail.com> | 2009-03-13 13:51:16 +0000 |
| commit | 4e3542263207ae49963811aeb84927027e7bb61d (patch) | |
| tree | 90814c02010977694748704fc96bf4347bf2104f /rts/Stats.c | |
| parent | 8fda9784f1eff82aa243073fd31b181080be3109 (diff) | |
| download | haskell-4e3542263207ae49963811aeb84927027e7bb61d.tar.gz | |
Use work-stealing for load-balancing in the GC
New flag: "+RTS -qb" disables load-balancing in the parallel GC
(though this is subject to change, I think we will probably want to do
something more automatic before releasing this).
To get the "PARGC3" configuration described in the "Runtime support
for Multicore Haskell" paper, use "+RTS -qg0 -qb -RTS".
The main advantage of this is that it allows us to easily disable
load-balancing altogether, which turns out to be important in parallel
programs. Maintaining locality is sometimes more important that
spreading the work out in parallel GC. There is a side benefit in
that the parallel GC should have improved locality even when
load-balancing, because each processor prefers to take work from its
own queue before stealing from others.
Diffstat (limited to 'rts/Stats.c')
| -rw-r--r-- | rts/Stats.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/rts/Stats.c b/rts/Stats.c index c43806f3af..7c8042a66d 100644 --- a/rts/Stats.c +++ b/rts/Stats.c @@ -716,7 +716,6 @@ stat_exit(int alloc) statsPrintf("whitehole_spin: %"FMT_Word64"\n", whitehole_spin); for (g = 0; g < RtsFlags.GcFlags.generations; g++) { for (s = 0; s < generations[g].n_steps; s++) { - statsPrintf("gen[%d].steps[%d].sync_todo: %"FMT_Word64"\n", g, s, generations[g].steps[s].sync_todo.spin); statsPrintf("gen[%d].steps[%d].sync_large_objects: %"FMT_Word64"\n", g, s, generations[g].steps[s].sync_large_objects.spin); } } |