diff options
Diffstat (limited to 'sys/kern/kern_timeout.c')
| -rw-r--r-- | sys/kern/kern_timeout.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/sys/kern/kern_timeout.c b/sys/kern/kern_timeout.c index df459cd..ecc65fc 100644 --- a/sys/kern/kern_timeout.c +++ b/sys/kern/kern_timeout.c @@ -47,6 +47,7 @@ __FBSDID("$FreeBSD$"); #include <sys/systm.h> #include <sys/bus.h> #include <sys/callout.h> +#include <sys/file.h> #include <sys/interrupt.h> #include <sys/kernel.h> #include <sys/ktr.h> @@ -101,6 +102,11 @@ SYSCTL_INT(_debug, OID_AUTO, to_avg_mpcalls_dir, CTLFLAG_RD, &avg_mpcalls_dir, 0, "Average number of MP direct callouts made per callout_process call. " "Units = 1/1000"); #endif + +static int ncallout; +SYSCTL_INT(_kern, OID_AUTO, ncallout, CTLFLAG_RDTUN, &ncallout, 0, + "Number of entries in callwheel and size of timeout() preallocation"); + /* * TODO: * allocate more timeout table slots when table overflows. @@ -252,6 +258,14 @@ kern_timeout_callwheel_alloc(caddr_t v) timeout_cpu = PCPU_GET(cpuid); cc = CC_CPU(timeout_cpu); + + /* + * Calculate the size of the callout wheel and the preallocated + * timeout() structures. + */ + ncallout = imin(16 + maxproc + maxfiles, 18508); + TUNABLE_INT_FETCH("kern.ncallout", &ncallout); + /* * Calculate callout wheel size, should be next power of two higher * than 'ncallout'. |
