Messages in this thread | | | From | Manfred Spraul <> | Subject | [PATCH 0/6] ipc/sem.c: performance improvements, FIFO | Date | Mon, 10 Jun 2013 19:16:45 +0200 |
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Hi Andrew,
I have cleaned up/improved my updates to sysv sem. Could you replace my patches in -akpm with this series?
- 1: cacheline align output from ipc_rcu_alloc - 2: cacheline align semaphore structures - 3: seperate-wait-for-zero-and-alter-tasks - 4: Always-use-only-one-queue-for-alter-operations - 5: Replace the global sem_otime with a distributed otime - 6: Rename-try_atomic_semop-to-perform_atomic
The first 2 patches result up to a ~30% performance improvement on a 2-core i3.
3,4 remove unnecessary loops in do_smart_update() and restore FIFO behavior.
I would expect that the 5th one will cause an improvement for multi-socket systems, but I don't have a test setup.
6 is just a cleanup/function rename.
-- Manfred
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