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author | davidxu <davidxu@FreeBSD.org> | 2010-10-09 02:50:23 +0000 |
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committer | davidxu <davidxu@FreeBSD.org> | 2010-10-09 02:50:23 +0000 |
commit | 55194e796cd9e8eb27d9bb4ec9f07184e390d01a (patch) | |
tree | 84ad0652e39fc58da6ca522cc6bf55a188109780 /sys/kern/vfs_aio.c | |
parent | 6afff59f3c11c8f879672f8dbcb0a74bcbae79a5 (diff) | |
download | FreeBSD-src-55194e796cd9e8eb27d9bb4ec9f07184e390d01a.zip FreeBSD-src-55194e796cd9e8eb27d9bb4ec9f07184e390d01a.tar.gz |
Create a global thread hash table to speed up thread lookup, use
rwlock to protect the table. In old code, thread lookup is done with
process lock held, to find a thread, kernel has to iterate through
process and thread list, this is quite inefficient.
With this change, test shows in extreme case performance is
dramatically improved.
Earlier patch was reviewed by: jhb, julian
Diffstat (limited to 'sys/kern/vfs_aio.c')
-rw-r--r-- | sys/kern/vfs_aio.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/sys/kern/vfs_aio.c b/sys/kern/vfs_aio.c index e05106a..69b4e0a 100644 --- a/sys/kern/vfs_aio.c +++ b/sys/kern/vfs_aio.c @@ -609,16 +609,20 @@ aio_init_aioinfo(struct proc *p) static int aio_sendsig(struct proc *p, struct sigevent *sigev, ksiginfo_t *ksi) { - int ret = 0; + struct thread *td; + int error; - PROC_LOCK(p); + error = sigev_findtd(p, sigev, &td); + if (error) + return (error); if (!KSI_ONQ(ksi)) { + ksiginfo_set_sigev(ksi, sigev); ksi->ksi_code = SI_ASYNCIO; ksi->ksi_flags |= KSI_EXT | KSI_INS; - ret = psignal_event(p, sigev, ksi); + tdsendsignal(p, td, ksi->ksi_signo, ksi); } PROC_UNLOCK(p); - return (ret); + return (error); } /* |