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scheduler: Fix power saving mode and other minor improvements

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This commit is contained in:
Pawel Dziepak 2013-11-24 23:20:42 +01:00
parent f95b6fdfc8
commit 13a89839fc
5 changed files with 31 additions and 16 deletions
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2
src/system/kernel/int.cpp
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@ -685,7 +685,7 @@ void assign_io_interrupt_to_cpu(long vector, int32 newCPU)
if (newCPU == -1)
newCPU = assign_cpu();
dprintf_no_syslog("IRQ %ld CPU %" B_PRId32 " -> CPU %" B_PRId32 "\n", vector, oldCPU, newCPU);
if (newCPU == oldCPU)
return;

7
src/system/kernel/scheduler/low_latency.cpp
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@ -19,6 +19,12 @@ switch_to_mode(void)
}
static void
set_cpu_enabled(int32 /* cpu */, bool /* enabled */)
{
}
static bool
has_cache_expired(Thread* thread)
{
@ -180,6 +186,7 @@ scheduler_mode_operations gSchedulerLowLatencyMode = {
true,
switch_to_mode,
set_cpu_enabled,
has_cache_expired,
choose_core,
should_rebalance,

23
src/system/kernel/scheduler/power_saving.cpp
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@ -16,6 +16,21 @@ using namespace Scheduler;
static int32 sSmallTaskCore;
static void
switch_to_mode(void)
{
sSmallTaskCore = -1;
}
static void
set_cpu_enabled(int32 cpu, bool enabled)
{
if (!enabled)
sSmallTaskCore = -1;
}
static bool
has_cache_expired(Thread* thread)
{
@ -31,13 +46,6 @@ has_cache_expired(Thread* thread)
}
static void
switch_to_mode(void)
{
sSmallTaskCore = -1;
}
static bool
try_small_task_packing(Thread* thread)
{
@ -244,6 +252,7 @@ scheduler_mode_operations gSchedulerPowerSavingMode = {
false,
switch_to_mode,
set_cpu_enabled,
has_cache_expired,
choose_core,
should_rebalance,

14
src/system/kernel/scheduler/scheduler.cpp
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@ -583,9 +583,6 @@ should_rebalance(Thread* thread)
{
ASSERT(!gSingleCore);
if (thread_is_idle_thread(thread))
return false;
return sCurrentMode->should_rebalance(thread);
}
@ -600,9 +597,6 @@ compute_cpu_load(int32 cpu)
if (oldLoad < 0)
return;
if (gCPUEntries[cpu].fLoad > kVeryHighLoad)
sCurrentMode->rebalance_irqs(false);
if (oldLoad != gCPUEntries[cpu].fLoad) {
int32 core = gCPUToCore[cpu];
@ -611,6 +605,9 @@ compute_cpu_load(int32 cpu)
update_load_heaps(core);
}
if (gCPUEntries[cpu].fLoad > kVeryHighLoad)
sCurrentMode->rebalance_irqs(false);
}
@ -1069,8 +1066,7 @@ static inline void
update_cpu_performance(Thread* thread, int32 thisCore)
{
int32 load = max_c(thread->scheduler_data->load,
gCoreEntries[thisCore].fLoad);
load /= gCoreEntries[thisCore].fCPUCount;
get_core_load(&gCoreEntries[thisCore]));
load = min_c(max_c(load, 0), kMaxLoad);
if (load < kTargetLoad) {
@ -1369,6 +1365,8 @@ scheduler_set_cpu_enabled(int32 cpu, bool enabled)
gCPU[cpu].disabled = !enabled;
sCurrentMode->set_cpu_enabled(cpu, enabled);
CoreEntry* core = &gCoreEntries[gCPUToCore[cpu]];
PackageEntry* package = &gPackageEntries[gCPUToPackage[cpu]];

1
src/system/kernel/scheduler/scheduler_modes.h
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@ -16,6 +16,7 @@ struct scheduler_mode_operations {
bool avoid_boost;
void (*switch_to_mode)(void);
void (*set_cpu_enabled)(int32 cpu, bool enabled);
bool (*has_cache_expired)(Thread* thread);
int32 (*choose_core)(Thread* thread);
bool (*should_rebalance)(Thread* thread);