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[kernel] Remove process startup_bonus to timeslice

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Previously we added startup_bonus to work around a segfault happening
when we preemted a newly created process instead of letting it give up
the CPU. Bug is not longer occuring, though that makes me nervous.
This commit is contained in:
Justin C. Miller
2020-07-30 19:11:51 -07:00
parent 58bc5acb1e
commit 6a00057817
2 changed files with 1 additions and 4 deletions
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2
src/kernel/scheduler.cpp
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@@ -123,7 +123,7 @@ scheduler::create_process(page_table *pml4, bool user)
thread *th = p->create_thread(default_priority, user);
auto *tcb = th->tcb();
tcb->time_left = quantum(default_priority) + startup_bonus;
tcb->time_left = quantum(default_priority);
log::debug(logs::task, "Creating thread %llx, priority %d, time slice %d",
th->koid(), tcb->priority, tcb->time_left);

3
src/kernel/scheduler.h
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@@ -33,9 +33,6 @@ public:
/// How long the base timer quantum is, in us
static const uint64_t quantum_micros = 500;
/// How much extra time (in us) to give a process to let it load
static const uint64_t startup_bonus = 16000;
/// How many quanta a process gets before being rescheduled
static const uint16_t process_quanta = 10;