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| author | Ben Gamari <bgamari.foss@gmail.com> | 2013-01-28 11:15:08 -0500 |
|---|---|---|
| committer | Simon Marlow <marlowsd@gmail.com> | 2013-01-30 10:50:14 +0000 |
| commit | a23661d242e8dd55007c4aee8a053f35de7705bd (patch) | |
| tree | e55bb371b52998e870a252de8768aaf4d1de6849 /rts/RetainerSet.h | |
| parent | 658817bf1b44e9be8a3857c09aae086bef937720 (diff) | |
| download | haskell-a23661d242e8dd55007c4aee8a053f35de7705bd.tar.gz | |
STM: Only wake up once
Previously, threads blocked on an STM retry would be sent a wakeup
message each time an unpark was requested. This could result in the
accumulation of a large number of wake-up messages, which would slow
wake-up once the sleeping thread is finally scheduled.
Here, we introduce a new closure type, STM_AWOKEN, which marks a TSO
which has been sent a wake-up message, allowing us to send only one
wakeup.
Diffstat (limited to 'rts/RetainerSet.h')
0 files changed, 0 insertions, 0 deletions