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Kernel: Make the colonel run at "Idle" priority (the lowest possible.)

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This means it won't hog the CPU for more than a single timeslice. :^)
This commit is contained in:
Andreas Kling 2019-04-20 15:58:45 +02:00
parent 45a30b4dfa
commit ec365b82d5
4 changed files with 12 additions and 4 deletions
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10
Applications/ProcessManager/ProcessModel.cpp
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@ -84,12 +84,14 @@ GVariant ProcessModel::data(const GModelIndex& index, Role role) const
case Column::State: return process.current_state.state; case Column::State: return process.current_state.state;
case Column::User: return process.current_state.user; case Column::User: return process.current_state.user;
case Column::Priority: case Column::Priority:
if (process.current_state.priority == "Low") if (process.current_state.priority == "Idle")
return 0; return 0;
if (process.current_state.priority == "Normal") if (process.current_state.priority == "Low")
return 1; return 1;
if (process.current_state.priority == "High") if (process.current_state.priority == "Normal")
return 2; return 2;
if (process.current_state.priority == "High")
return 3;
ASSERT_NOT_REACHED(); ASSERT_NOT_REACHED();
return 3; return 3;
case Column::Linear: return (int)process.current_state.linear; case Column::Linear: return (int)process.current_state.linear;
@ -110,6 +112,8 @@ GVariant ProcessModel::data(const GModelIndex& index, Role role) const
case Column::State: return process.current_state.state; case Column::State: return process.current_state.state;
case Column::User: return process.current_state.user; case Column::User: return process.current_state.user;
case Column::Priority: case Column::Priority:
if (process.current_state.priority == "Idle")
return String::empty();
if (process.current_state.priority == "High") if (process.current_state.priority == "High")
return *m_high_priority_icon; return *m_high_priority_icon;
if (process.current_state.priority == "Low") if (process.current_state.priority == "Low")

1
Kernel/Process.cpp
View file

@ -2376,6 +2376,7 @@ int Process::sys$get_shared_buffer_size(int shared_buffer_id)
const char* to_string(Process::Priority priority) const char* to_string(Process::Priority priority)
{ {
switch (priority) { switch (priority) {
case Process::IdlePriority: return "Idle";
case Process::LowPriority: return "Low"; case Process::LowPriority: return "Low";
case Process::NormalPriority: return "Normal"; case Process::NormalPriority: return "Normal";
case Process::HighPriority: return "High"; case Process::HighPriority: return "High";

1
Kernel/Process.h
View file

@ -43,6 +43,7 @@ public:
static Vector<Process*> all_processes(); static Vector<Process*> all_processes();
enum Priority { enum Priority {
IdlePriority,
LowPriority, LowPriority,
NormalPriority, NormalPriority,
HighPriority, HighPriority,

4
Kernel/Scheduler.cpp
View file

@ -18,6 +18,8 @@ static dword time_slice_for(Process::Priority priority)
return 15; return 15;
case Process::LowPriority: case Process::LowPriority:
return 5; return 5;
case Process::IdlePriority:
return 1;
} }
ASSERT_NOT_REACHED(); ASSERT_NOT_REACHED();
} }
@ -385,7 +387,7 @@ void Scheduler::initialize()
initialize_redirection(); initialize_redirection();
s_colonel_process = Process::create_kernel_process("colonel", nullptr); s_colonel_process = Process::create_kernel_process("colonel", nullptr);
// Make sure the colonel uses a smallish time slice. // Make sure the colonel uses a smallish time slice.
s_colonel_process->set_priority(Process::LowPriority); s_colonel_process->set_priority(Process::IdlePriority);
load_task_register(s_redirection.selector); load_task_register(s_redirection.selector);
} }