| 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_avg.py |
### Dstat most expensive I/O process plugin
### Displays the name of the most expensive I/O process
###
### Authority: dag@wieers.com
### For more information, see:
### http://eaglet.rain.com/rick/linux/schedstat/
class dstat_plugin(dstat):
def __init__(self):
self.name = 'highest average'
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, 'ran': 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]), 'ran': long(l[2])}
if self.pidset2[pid]['ran'] - self.pidset1[pid]['ran'] > 0:
avgwait = (self.pidset2[pid]['wait_ticks'] - self.pidset1[pid]['wait_ticks']) * 1.0 / (self.pidset2[pid]['ran'] - self.pidset1[pid]['ran']) / elapsed
else:
avgwait = 0
### Get the process that spends the most jiffies
if avgwait > self.val['result']:
self.val['result'] = avgwait
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'], 'f', 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