函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:block\kyber-iosched.c Create Date:2022-07-27 19:27:35
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：kyber_timer_fn

函数原型：static void kyber_timer_fn(struct timer_list *t)

返回类型：void

参数：

类型参数名称
struct timer_list *t
278  kqd等于from_timer(kqd, t, timer)
281  bool bad = false
284  遍历在线CPU(cpu)
287  cpu_latency等于per_cpu_ptr(cpu_latency, cpu)
288  以sched_domain小于KYBER_OTHER循环
289  flush_latency_buckets(kqd, cpu_latency, sched_domain, KYBER_TOTAL_LATENCY)
291  flush_latency_buckets(kqd, cpu_latency, sched_domain, KYBER_IO_LATENCY)
301  以sched_domain小于KYBER_OTHER循环
304  p90等于Calculate the histogram bucket with the given percentile rank, or -1 if there* aren't enough samples yet.
306  如果p90大于等于KYBER_GOOD_BUCKETS则bad = true
315  以sched_domain小于KYBER_OTHER循环
319  p99等于Calculate the histogram bucket with the given percentile rank, or -1 if there* aren't enough samples yet.
329  如果bad则
330  如果p99小于0则p99等于domain_p99[sched_domain]
332  domain_p99[sched_domain]等于负1
333  否则如果p99大于等于0则
334  domain_p99[sched_domain]等于p99
336  如果p99小于0则继续下一循环
348  如果bad或p99大于等于KYBER_GOOD_BUCKETS则
349  orig_depth等于@depth: Number of bits used in the whole bitmap.
350  depth等于orig_depth乘p99加1的和右移KYBER_LATENCY_SHIFT位
351  kyber_resize_domain(kqd, sched_domain, depth)