diff options
| author | davide <davide@FreeBSD.org> | 2013-02-28 10:46:54 +0000 |
|---|---|---|
| committer | davide <davide@FreeBSD.org> | 2013-02-28 10:46:54 +0000 |
| commit | 2bf12d0c7ceced74a813d6940dd07310a11d6a2a (patch) | |
| tree | 33c7f3089361e0ab5379fdc8445540c6eeb03ed0 /sys/pc98 | |
| parent | f3c985cbe184c9d4c31d0e7140c146768a82833c (diff) | |
| download | FreeBSD-src-2bf12d0c7ceced74a813d6940dd07310a11d6a2a.zip FreeBSD-src-2bf12d0c7ceced74a813d6940dd07310a11d6a2a.tar.gz | |
MFcalloutng:
When CPU becomes idle, cpu_idleclock() calculates time to the next timer
event in order to reprogram hw timer. Return that time in sbintime_t to
the caller and pass it to acpi_cpu_idle(), where it can be used as one
more factor (quite precise) to extimate furter sleep time and choose
optimal sleep state. This is a preparatory change for further callout
improvements will be committed in the next days.
The commmit is not targeted for MFC.
Diffstat (limited to 'sys/pc98')
| -rw-r--r-- | sys/pc98/pc98/machdep.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/sys/pc98/pc98/machdep.c b/sys/pc98/pc98/machdep.c index 3133d1b..b0d5acd 100644 --- a/sys/pc98/pc98/machdep.c +++ b/sys/pc98/pc98/machdep.c @@ -1145,7 +1145,7 @@ SYSCTL_INT(_machdep, OID_AUTO, idle_mwait, CTLFLAG_RW, &idle_mwait, #define STATE_SLEEPING 0x2 static void -cpu_idle_hlt(int busy) +cpu_idle_hlt(sbintime_t sbt) { int *state; @@ -1186,7 +1186,7 @@ cpu_idle_hlt(int busy) #define MWAIT_C4 0x30 static void -cpu_idle_mwait(int busy) +cpu_idle_mwait(sbintime_t sbt) { int *state; @@ -1209,7 +1209,7 @@ cpu_idle_mwait(int busy) } static void -cpu_idle_spin(int busy) +cpu_idle_spin(sbintime_t sbt) { int *state; int i; @@ -1229,11 +1229,12 @@ cpu_idle_spin(int busy) } } -void (*cpu_idle_fn)(int) = cpu_idle_hlt; +void (*cpu_idle_fn)(sbintime_t) = cpu_idle_hlt; void cpu_idle(int busy) { + sbintime_t sbt = -1; CTR2(KTR_SPARE2, "cpu_idle(%d) at %d", busy, curcpu); @@ -1251,11 +1252,11 @@ cpu_idle(int busy) /* If we have time - switch timers into idle mode. */ if (!busy) { critical_enter(); - cpu_idleclock(); + sbt = cpu_idleclock(); } /* Call main idle method. */ - cpu_idle_fn(busy); + cpu_idle_fn(sbt); /* Switch timers mack into active mode. */ if (!busy) { |
