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| author | bde <bde@FreeBSD.org> | 2000-09-17 15:12:04 +0000 |
|---|---|---|
| committer | bde <bde@FreeBSD.org> | 2000-09-17 15:12:04 +0000 |
| commit | 43da3c7d5337f1a4e9e85852abb81dff5ef9e733 (patch) | |
| tree | cb1587b5b80256b678e180623fc9561ddb1b8b4b /sys/kern/kern_sig.c | |
| parent | 80d33b22bf795a46870a6b7d65b4015725f6e860 (diff) | |
| download | FreeBSD-src-43da3c7d5337f1a4e9e85852abb81dff5ef9e733.zip FreeBSD-src-43da3c7d5337f1a4e9e85852abb81dff5ef9e733.tar.gz | |
Unpessimized CURSIG(). The fast path through CURSIG() was broken in
the 128-bit sigset_t changes by moving conditionally (rarely) executed
code to the beginning where it is always executed, and since this code
now involves 3 128-bit operations, the pessimization was relatively
large. This change speeds up lmbench's pipe latency benchmark by
3.5%.
Fixed style bugs in CURSIG().
Diffstat (limited to 'sys/kern/kern_sig.c')
| -rw-r--r-- | sys/kern/kern_sig.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/sys/kern/kern_sig.c b/sys/kern/kern_sig.c index 1e8561f..b93277b 100644 --- a/sys/kern/kern_sig.c +++ b/sys/kern/kern_sig.c @@ -172,7 +172,7 @@ static int sigproptbl[NSIG] = { * process, 0 if none. If there is a pending stop signal with default * action, the process stops in issignal(). * - * MP SAFE + * MP SAFE. */ int CURSIG(struct proc *p) @@ -180,16 +180,16 @@ CURSIG(struct proc *p) sigset_t tmpset; int r; + if (SIGISEMPTY(p->p_siglist)) + return (0); tmpset = p->p_siglist; SIGSETNAND(tmpset, p->p_sigmask); - if (SIGISEMPTY(p->p_siglist) || - (!(p->p_flag & P_TRACED) && SIGISEMPTY(tmpset))) { - return(0); - } + if (SIGISEMPTY(tmpset) && (p->p_flag & P_TRACED) == 0) + return (0); mtx_enter(&Giant, MTX_DEF); r = issignal(p); mtx_exit(&Giant, MTX_DEF); - return(r); + return (r); } static __inline int |
