hulk inclusion
category: bugfix
bugzilla: 13257
CVE: NA

If there are a lot of interruptions, the CPU usage fluctuation
will be more serious. Because CONFIG_IRQ_TIME_ACCOUNTING is not
enabled, the interrupt time is not counted separately. If the
interrupt occurs during the idle period, the idle runtime including
irq time. When irq occurs during other task, the runtime of the
task include irq time also.

Therefore, when the irq is irregular, the occupancy statistics
of the CPU may fluctuate greatly.

In this patch, use CONFIG_IRQ_TIME_ACCOUNTING to count the
irq time, the irq time is subtracted from the idle time, and
the CPU usage can be relatively accurately counted.
Signed-off-by: NXie XiuQi <xiexiuqi@huawei.com>
Reviewed-by: NCheng Jian <cj.chengjian@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>