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Code Issues Releases Wiki Activity

🔧 改用local apic定时器进行进程时间片更新

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This commit is contained in:
fslongjin
2022-07-11 21:47:28 +08:00
parent 594aeadf65
commit defb9e769c
9 changed files with 220 additions and 51 deletions
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20
kernel/driver/timers/HPET/HPET.c
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@ -70,16 +70,11 @@ void HPET_handler(uint64_t number, uint64_t param, struct pt_regs *regs)
if (container_of(list_next(&timer_func_head.list), struct timer_func_list_t, list)->expire_jiffies <= timer_jiffies)
raise_softirq((1 << TIMER_SIRQ));
// if (current_pcb->pid == 2)
// kwarn("timer_jiffies = %ld video_refresh_expire_jiffies=%ld", timer_jiffies, video_refresh_expire_jiffies);
// 当时间到了，或进程发生切换时，刷新帧缓冲区
if (timer_jiffies >= video_refresh_expire_jiffies || (video_last_refresh_pid != current_pcb->pid))
{
raise_softirq(VIDEO_REFRESH_SIRQ);
}
sched_update_jiffies();
break;
default:
@ -92,12 +87,12 @@ void HPET_handler(uint64_t number, uint64_t param, struct pt_regs *regs)
* @brief 测量apic定时器频率的中断回调函数
*
*/
void HPET_measure_apic_timer_handler()
void HPET_measure_apic_timer_handler(uint64_t number, uint64_t param, struct pt_regs *regs)
{
// 停止apic定时器
// 写入每1ms的ticks
apic_timer_stop();
apic_timer_ticksIn1ms = 0xFFFFFFFF - apic_timer_get_current();
apic_timer_ticks_result = 0xFFFFFFFF - apic_timer_get_current();
measure_apic_timer_flag = true;
}
@ -108,7 +103,7 @@ void HPET_measure_apic_timer_handler()
void HPET_measure_apic_timer_freq()
{
kinfo("Measuring local APIC timer's frequency...");
const uint64_t interval = 1; // 测量1毫秒内的计数
const uint64_t interval = APIC_TIMER_INTERVAL; // 测量给定时间内的计数
struct apic_IO_APIC_RTE_entry entry;
// 使用I/O APIC 的IRQ2接收hpet定时器0的中断
@ -137,15 +132,14 @@ void HPET_measure_apic_timer_freq()
irq_register(34, &entry, &HPET_measure_apic_timer_handler, 0, &HPET_intr_controller, "HPET0 measure");
// 设置div16
apic_timer_set_div(0x3);
apic_timer_stop();
// 设置初始计数
apic_timer_set_div(APIC_TIMER_DIVISOR);
// 设置初始计数
apic_timer_set_init_cnt(0xFFFFFFFF);
// 启动apic定时器
apic_timer_set_LVT(151, APIC_LVT_Timer_One_Shot);
apic_timer_set_LVT(151, 0, APIC_LVT_Timer_One_Shot);
*(uint64_t *)(HPET_REG_BASE + GEN_CONF) = 3; // 置位旧设备中断路由兼容标志位、定时器组使能标志位，开始计时
io_mfence();
@ -156,7 +150,7 @@ void HPET_measure_apic_timer_freq()
*(uint64_t *)(HPET_REG_BASE + GEN_CONF) = 0; // 停用HPET定时器
io_mfence();
kinfo("Local APIC timer's freq: %d ticks/ms.", apic_timer_ticksIn1ms);
kinfo("Local APIC timer's freq: %d ticks/ms.", apic_timer_ticks_result);
}
/**