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### Dstat most expensive process plugin
### Displays the name of the most expensive process
###
### Authority: dag@wieers.com
### More information:
### http://lwn.net/Articles/317814/
class dstat_plugin(dstat):
def __init__(self):
self.name = 'out of memory'
self.type = 's'
self.width = 18
self.scale = 0
self.vars = ('kill score',)
self.pid = str(os.getpid())
def check(self):
if not os.access('/proc/self/oom_score', os.R_OK):
raise Exception, 'Kernel does not support /proc/pid/oom_score, use at least 2.6.11.'
def extract(self):
self.val['max'] = 0.0
self.val['kill score'] = ''
for pid in os.listdir('/proc/'):
try:
### Is it a pid ?
int(pid)
### Filter out dstat
if pid == self.pid: continue
### Extract name
name = open('/proc/%s/stat' % pid).read().split()[1][1:-1]
### Using dopen() will cause too many open files
l = open('/proc/%s/oom_score' % pid).read().split()
except ValueError:
continue
except IOError:
continue
if len(l) < 1: continue
oom_score = int(l[0])
### Is it a new topper ?
if oom_score <= self.val['max']: continue
self.val['max'] = oom_score
self.val['name'] = getnamebypid(pid, name)
self.val['pid'] = pid
if self.val['max'] != 0.0:
self.val['kill score'] = '%-*s%s' % (self.width-4, self.val['name'][0:self.width-4], cprint(self.val['max'], 'f', 4, 1000))
### Debug (show PID)
# self.val['kill score'] = '%*s %-*s' % (5, self.val['pid'], self.width-6, self.val['name'])
def showcsv(self):
return '%s / %d%%' % (self.val['name'], self.val['max'])
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