diff options
| author | Emilio G. Cota <cota@braap.org> | 2017-10-28 02:16:41 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-08-23 18:46:25 +0200 |
| commit | cb764d06650da5fad7c833975b255d08e91a0a52 (patch) | |
| tree | 7f403b625d17ba77ad11639d976b2c847f0c830c /include | |
| parent | d557de4a0e290c9946f37ff1fba7204844cccc64 (diff) | |
qsp: track BQL callers explicitly
The BQL is acquired via qemu_mutex_lock_iothread(), which makes
the profiler assign the associated wait time (i.e. most of
BQL wait time) entirely to that function. This loses the original
call site information, which does not help diagnose BQL contention.
Fix it by tracking the callers explicitly.
Signed-off-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/qemu/main-loop.h | 4 | ||||
| -rw-r--r-- | include/qemu/thread.h | 1 |
2 files changed, 4 insertions, 1 deletions
diff --git a/include/qemu/main-loop.h b/include/qemu/main-loop.h index 721aa2416a..e59f9ae1e9 100644 --- a/include/qemu/main-loop.h +++ b/include/qemu/main-loop.h @@ -276,7 +276,9 @@ bool qemu_mutex_iothread_locked(void); * NOTE: tools currently are single-threaded and qemu_mutex_lock_iothread * is a no-op there. */ -void qemu_mutex_lock_iothread(void); +#define qemu_mutex_lock_iothread() \ + qemu_mutex_lock_iothread_impl(__FILE__, __LINE__) +void qemu_mutex_lock_iothread_impl(const char *file, int line); /** * qemu_mutex_unlock_iothread: Unlock the main loop mutex. diff --git a/include/qemu/thread.h b/include/qemu/thread.h index c90ea4783f..dacebcfff0 100644 --- a/include/qemu/thread.h +++ b/include/qemu/thread.h @@ -35,6 +35,7 @@ typedef int (*QemuRecMutexTrylockFunc)(QemuRecMutex *m, const char *f, int l); typedef void (*QemuCondWaitFunc)(QemuCond *c, QemuMutex *m, const char *f, int l); +extern QemuMutexLockFunc qemu_bql_mutex_lock_func; extern QemuMutexLockFunc qemu_mutex_lock_func; extern QemuMutexTrylockFunc qemu_mutex_trylock_func; extern QemuRecMutexLockFunc qemu_rec_mutex_lock_func; |