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Give processes multiple quanta before rescheduling

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This commit is contained in:
Justin C. Miller
2018-09-16 23:34:42 -07:00
parent 5e6769036c
commit c67c1bd6a2
3 changed files with 13 additions and 6 deletions
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11
src/kernel/scheduler.cpp
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@@ -13,8 +13,6 @@
#include "kutil/assert.h"
scheduler scheduler::s_instance(nullptr);
static const uint64_t quantum_micros = 1000000;
//static const uint32_t quantum_micros = 20000000;
const int stack_size = 0x1000;
const uint64_t rflags_noint = 0x002;
@@ -39,6 +37,7 @@ scheduler::scheduler(lapic *apic) :
idle->priority = last_pri;
idle->rsp = 0; // This will get set when we switch away
idle->pml4 = page_manager::get_pml4();
idle->quanta = process_quanta;
idle->flags =
process_flags::running |
process_flags::ready |
@@ -156,6 +155,7 @@ scheduler::create_process(const char *name, const void *data, size_t size)
proc->priority = default_priority;
proc->rsp = reinterpret_cast<addr_t>(loader_state);
proc->pml4 = pml4;
proc->quanta = process_quanta;
proc->flags =
process_flags::running |
process_flags::ready |
@@ -271,9 +271,10 @@ scheduler::schedule(addr_t rsp0)
addr_t
scheduler::tick(addr_t rsp0)
{
// TODO: action based on the task using the whole quantum
rsp0 = schedule(rsp0);
if (--m_current->quanta == 0) {
m_current->quanta = process_quanta;
rsp0 = schedule(rsp0);
}
m_apic->reset_timer(m_tick_count);
return rsp0;
}