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Add kernel argument to turn on/off time sharing

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Add "-T 0" to mcreboot.sh if you want to turn off time sharing.  When
it's turned off, McKernel doesn't activate interval timer when the
length of per-CPU run-queue is larger than one.

Change-Id: I2cedc1b30a9cd9a0f4608a32ecec0a0d58c6225e
This commit is contained in:
Masamichi Takagi
2018-10-31 20:57:12 +09:00
committed by Dominique Martinet
parent 7a3f4d7501
commit 38e68f358a
4 changed files with 23 additions and 2 deletions
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5
kernel/process.c
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@ -91,6 +91,7 @@ ihk_spinlock_t runq_reservation_lock;
int idle_halt = 0;
int allow_oversubscribe = 0;
int time_sharing = 0;
void
init_process(struct process *proc, struct process *parent)
@ -3100,6 +3101,10 @@ void set_timer(int runq_locked)
int num_running = 0;
unsigned long irqstate;
if (!time_sharing) {
return;
}
if (!runq_locked) {
irqstate = ihk_mc_spinlock_lock(&(v->runq_lock));
}