| Current Path : /usr/share/dstat/ |
Linux gator3171.hostgator.com 4.19.286-203.ELK.el7.x86_64 #1 SMP Wed Jun 14 04:33:55 CDT 2023 x86_64 |
| Current File : //usr/share/dstat/dstat_top_latency.py |
### Authority: Dag Wieers <dag$wieers,com>
class dstat_plugin(dstat):
"""
Top process with highest total latency.
Displays name and total amount of CPU time waited in milliseconds of
the process that has the highest total amount waited for the measured
timeframe.
For more information see:
http://eaglet.rain.com/rick/linux/schedstat/
"""
def __init__(self):
self.name = 'highest total'
self.vars = ('latency process',)
self.type = 's'
self.width = 17
self.scale = 0
self.pidset1 = {}
def check(self):
if not os.access('/proc/self/schedstat', os.R_OK):
raise Exception, 'Kernel has no scheduler statistics, use at least 2.6.12'
def extract(self):
self.output = ''
self.pidset2 = {}
self.val['result'] = 0
for pid in proc_pidlist():
try:
### Reset values
if not self.pidset1.has_key(pid):
self.pidset1[pid] = {'wait_ticks': 0}
### Extract name
name = proc_splitline('/proc/%s/stat' % pid)[1][1:-1]
### Extract counters
l = proc_splitline('/proc/%s/schedstat' % pid)
except IOError:
continue
except IndexError:
continue
if len(l) != 3: continue
self.pidset2[pid] = {'wait_ticks': long(l[1])}
totwait = (self.pidset2[pid]['wait_ticks'] - self.pidset1[pid]['wait_ticks']) * 1.0 / elapsed
### Get the process that spends the most jiffies
if totwait > self.val['result']:
self.val['result'] = totwait
self.val['pid'] = pid
self.val['name'] = getnamebypid(pid, name)
if step == op.delay:
self.pidset1 = self.pidset2
if self.val['result'] != 0.0:
self.output = '%-*s%s' % (self.width-4, self.val['name'][0:self.width-4], cprint(self.val['result'], 'd', 4, 100))
### Debug (show PID)
# self.output = '%*s %-*s' % (5, self.val['pid'], self.width-6, self.val['name'])
def showcsv(self):
return '%s / %.4f' % (self.val['name'], self.val['result'])
# vim:ts=4:sw=4:et