Author: mjg
Date: Wed Jul 15 10:14:00 2020
New Revision: 363213
URL: https://svnweb.freebsd.org/changeset/base/363213
Log:
fd: add obvious branch predictions to fdalloc
Modified:
head/sys/kern/kern_descrip.c
Modified: head/sys/kern/kern_descrip.c
==============================================================================
--- head/sys/kern/kern_descrip.c Wed Jul 15 10:13:23 2020
(r363212)
+++ head/sys/kern/kern_descrip.c Wed Jul 15 10:14:00 2020
(r363213)
@@ -1847,9 +1847,9 @@ fdalloc(struct thread *td, int minfd, int *result)
* If none is found, grow the file table.
*/
fd = fd_first_free(fdp, minfd, fdp->fd_nfiles);
- if (fd >= maxfd)
+ if (__predict_false(fd >= maxfd))
return (EMFILE);
- if (fd >= fdp->fd_nfiles) {
+ if (__predict_false(fd >= fdp->fd_nfiles)) {
allocfd = min(fd * 2, maxfd);
#ifdef RACCT
if (RACCT_ENABLED()) {
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