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| author | Paolo Bonzini | 2017-01-12 19:07:54 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi | 2017-01-16 14:25:18 +0100 |
| commit | fbcc3e5004f01653b2885965c59cade25e286c18 (patch) | |
| tree | ccdd40452c6ddce192c33a68832726fde7ee51f9 /util/trace-events | |
| parent | aio: make ctx->list_lock a QemuLockCnt, subsuming ctx->walking_bh (diff) | |
| download | qemu-fbcc3e5004f01653b2885965c59cade25e286c18.tar.gz qemu-fbcc3e5004f01653b2885965c59cade25e286c18.tar.xz qemu-fbcc3e5004f01653b2885965c59cade25e286c18.zip | |
qemu-thread: optimize QemuLockCnt with futexes on Linux
This is complex, but I think it is reasonably documented in the source.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20170112180800.21085-5-pbonzini@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'util/trace-events')
| -rw-r--r-- | util/trace-events | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/util/trace-events b/util/trace-events index ed06aee2ec..2b8aa30739 100644 --- a/util/trace-events +++ b/util/trace-events @@ -30,3 +30,13 @@ qemu_anon_ram_free(void *ptr, size_t size) "ptr %p size %zu" hbitmap_iter_skip_words(const void *hb, void *hbi, uint64_t pos, unsigned long cur) "hb %p hbi %p pos %"PRId64" cur 0x%lx" hbitmap_reset(void *hb, uint64_t start, uint64_t count, uint64_t sbit, uint64_t ebit) "hb %p items %"PRIu64",%"PRIu64" bits %"PRIu64"..%"PRIu64 hbitmap_set(void *hb, uint64_t start, uint64_t count, uint64_t sbit, uint64_t ebit) "hb %p items %"PRIu64",%"PRIu64" bits %"PRIu64"..%"PRIu64 + +# util/lockcnt.c +lockcnt_fast_path_attempt(const void *lockcnt, int expected, int new) "lockcnt %p fast path %d->%d" +lockcnt_fast_path_success(const void *lockcnt, int expected, int new) "lockcnt %p fast path %d->%d succeeded" +lockcnt_unlock_attempt(const void *lockcnt, int expected, int new) "lockcnt %p unlock %d->%d" +lockcnt_unlock_success(const void *lockcnt, int expected, int new) "lockcnt %p unlock %d->%d succeeded" +lockcnt_futex_wait_prepare(const void *lockcnt, int expected, int new) "lockcnt %p preparing slow path %d->%d" +lockcnt_futex_wait(const void *lockcnt, int val) "lockcnt %p waiting on %d" +lockcnt_futex_wait_resume(const void *lockcnt, int new) "lockcnt %p after wait: %d" +lockcnt_futex_wake(const void *lockcnt) "lockcnt %p waking up one waiter" |