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iocost_monitor: Report more info with higher accuracy 

When outputting json:

* Don't truncate numbers.

* Report address of iocg to ease drilling down further.

When outputting table:

* Use math.ceil() for delay_ms so that small delays don't read as 0.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Tejun Heo 2019-09-04 12:45:55 -07:00 committed by Jens Axboe
parent e742bd5cb5
commit b06f2d35c6
1 changed files with 11 additions and 7 deletions
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18
tools/cgroup/iocost_monitor.py
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@ -13,6 +13,7 @@ import sys
import re
import time
import json
import math
import drgn
from drgn import container_of
@ -95,7 +96,7 @@ class IocStat:
self.enabled = ioc.enabled.value_()
self.running = ioc.running.value_() == IOC_RUNNING
self.period_ms = round(ioc.period_us.value_() / 1_000)
self.period_ms = ioc.period_us.value_() / 1_000
self.period_at = ioc.period_at.value_() / 1_000_000
self.vperiod_at = ioc.period_at_vtime.value_() / VTIME_PER_SEC
self.vrate_pct = ioc.vtime_rate.counter.value_() * 100 / VTIME_PER_USEC
@ -147,6 +148,7 @@ class IocgStat:
self.inuse = iocg.inuse.value_()
self.hwa_pct = iocg.hweight_active.value_() * 100 / HWEIGHT_WHOLE
self.hwi_pct = iocg.hweight_inuse.value_() * 100 / HWEIGHT_WHOLE
self.address = iocg.value_()
vdone = iocg.done_vtime.counter.value_()
vtime = iocg.vtime.counter.value_()
@ -157,15 +159,15 @@ class IocgStat:
else:
self.inflight_pct = 0
self.use_delay = min(blkg.use_delay.counter.value_(), 99)
self.delay_ms = min(round(blkg.delay_nsec.counter.value_() / 1_000_000), 999)
self.use_delay = blkg.use_delay.counter.value_()
self.delay_ms = blkg.delay_nsec.counter.value_() / 1_000_000
usage_idx = iocg.usage_idx.value_()
self.usages = []
self.usage = 0
for i in range(NR_USAGE_SLOTS):
usage = iocg.usages[(usage_idx + i) % NR_USAGE_SLOTS].value_()
upct = min(usage * 100 / HWEIGHT_WHOLE, 999)
upct = usage * 100 / HWEIGHT_WHOLE
self.usages.append(upct)
self.usage = max(self.usage, upct)
@ -181,7 +183,8 @@ class IocgStat:
'inflight_pct' : str(self.inflight_pct),
'use_delay' : str(self.use_delay),
'delay_ms' : str(self.delay_ms),
'usage_pct' : str(self.usage) }
'usage_pct' : str(self.usage),
'address' : str(hex(self.address)) }
for i in range(len(self.usages)):
out[f'usage_pct_{i}'] = str(self.usages[i])
return out
@ -192,9 +195,10 @@ class IocgStat:
f'{self.inuse:5}/{self.active:5} ' \
f'{self.hwi_pct:6.2f}/{self.hwa_pct:6.2f} ' \
f'{self.inflight_pct:6.2f} ' \
f'{self.use_delay:2}*{self.delay_ms:03} '
f'{min(self.use_delay, 99):2}*'\
f'{min(math.ceil(self.delay_ms), 999):03} '
for u in self.usages:
out += f'{round(u):03d}:'
out += f'{min(round(u), 999):03d}:'
out = out.rstrip(':')
return out