Created
June 15, 2012 02:29
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watch IO for process
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#!/usr/bin/python | |
# Monitoring per-process disk I/O activity | |
# written by http://www.vpsee.com | |
import sys, os, time, signal, re | |
class DiskIO: | |
def __init__(self, pname=None, pid=None, reads=0, writes=0): | |
self.pname = pname | |
self.pid = pid | |
self.reads = 0 | |
self.writes = 0 | |
def main(): | |
argc = len(sys.argv) | |
if argc != 1: | |
print "usage: ./iotop" | |
sys.exit(0) | |
if os.getuid() != 0: | |
print "must be run as root" | |
sys.exit(0) | |
signal.signal(signal.SIGINT, signal_handler) | |
os.system('echo 1 > /proc/sys/vm/block_dump') | |
print "TASK PID READ WRITE" | |
while True: | |
os.system('dmesg -c > /tmp/diskio.log') | |
l = [] | |
f = open('/tmp/diskio.log', 'r') | |
line = f.readline() | |
while line: | |
m = re.match(\ | |
'^(\S+)\((\d+)\): (READ|WRITE) block (\d+) on (\S+)', line) | |
if m != None: | |
if not l: | |
l.append(DiskIO(m.group(1), m.group(2))) | |
line = f.readline() | |
continue | |
found = False | |
for item in l: | |
if item.pid == m.group(2): | |
found = True | |
if m.group(3) == "READ": | |
item.reads = item.reads + 1 | |
elif m.group(3) == "WRITE": | |
item.writes = item.writes + 1 | |
if not found: | |
l.append(DiskIO(m.group(1), m.group(2))) | |
line = f.readline() | |
time.sleep(1) | |
for item in l: | |
print "%-10s %10s %10d %10d" % \ | |
(item.pname, item.pid, item.reads, item.writes) | |
def signal_handler(signal, frame): | |
os.system('echo 0 > /proc/sys/vm/block_dump') | |
sys.exit(0) | |
if __name__=="__main__": | |
main() |
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