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Kernel: Don't use the profile timer if we don't have a timer to assign

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Liav A 2021-05-14 11:33:34 +03:00 • committed by Andreas Kling
parent a5801e9919
commit 8a4cc735b9
3 changed files with 43 additions and 21 deletions
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45
Kernel/Time/TimeManagement.cpp
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@ -262,10 +262,16 @@ UNMAP_AFTER_INIT bool TimeManagement::probe_and_set_non_legacy_hardware_timers()
VERIFY(periodic_timers.size() + non_periodic_timers.size() > 0);
if (periodic_timers.size() > 0)
m_system_timer = periodic_timers[0];
else
m_system_timer = non_periodic_timers[0];
size_t taken_periodic_timers_count = 0;
size_t taken_non_periodic_timers_count = 0;
if (periodic_timers.size() > taken_periodic_timers_count) {
m_system_timer = periodic_timers[taken_periodic_timers_count];
taken_periodic_timers_count += 1;
} else if (non_periodic_timers.size() > taken_non_periodic_timers_count) {
m_system_timer = non_periodic_timers[taken_non_periodic_timers_count];
taken_non_periodic_timers_count += 1;
}
m_system_timer->set_callback([this](const RegisterState& regs) {
// Update the time. We don't really care too much about the
@ -291,13 +297,18 @@ UNMAP_AFTER_INIT bool TimeManagement::probe_and_set_non_legacy_hardware_timers()
// can query the timer.
m_time_keeper_timer = m_system_timer;
if (periodic_timers.size() > 1)
m_profile_timer = periodic_timers[1];
else
m_profile_timer = non_periodic_timers[1];
if (periodic_timers.size() > taken_periodic_timers_count) {
m_profile_timer = periodic_timers[taken_periodic_timers_count];
taken_periodic_timers_count += 1;
} else if (non_periodic_timers.size() > taken_non_periodic_timers_count) {
m_profile_timer = non_periodic_timers[taken_non_periodic_timers_count];
taken_non_periodic_timers_count += 1;
}
m_profile_timer->set_callback(PerformanceManager::timer_tick);
m_profile_timer->try_to_set_frequency(m_profile_timer->calculate_nearest_possible_frequency(1));
if (m_profile_timer) {
m_profile_timer->set_callback(PerformanceManager::timer_tick);
m_profile_timer->try_to_set_frequency(m_profile_timer->calculate_nearest_possible_frequency(1));
}
return true;
}
@ -389,16 +400,22 @@ void TimeManagement::system_timer_tick(const RegisterState& regs)
Scheduler::timer_tick(regs);
}
void TimeManagement::enable_profile_timer()
bool TimeManagement::enable_profile_timer()
{
if (m_profile_enable_count.fetch_add(1) == 0)
if (m_profile_timer && m_profile_enable_count.fetch_add(1) == 0) {
m_profile_timer->try_to_set_frequency(m_profile_timer->calculate_nearest_possible_frequency(OPTIMAL_PROFILE_TICKS_PER_SECOND_RATE));
return true;
}
return false;
}
void TimeManagement::disable_profile_timer()
bool TimeManagement::disable_profile_timer()
{
if (m_profile_enable_count.fetch_sub(1) == 1)
if (m_profile_timer && m_profile_enable_count.fetch_sub(1) == 1) {
m_profile_timer->try_to_set_frequency(m_profile_timer->calculate_nearest_possible_frequency(1));
return true;
}
return false;
}
}