X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=swapmon.py;h=7ca19bc4281c02a5fc8cde9363e87301b6fcb1f0;hb=be3607334dff10a4dcf1609ffa70c174007cb214;hp=f15879f4c65998ddecde57ef8b10d409e090f041;hpb=3a0a4118e3adf3aaa282a5adedc1671987ab3c1e;p=mom.git diff --git a/swapmon.py b/swapmon.py index f15879f..7ca19bc 100755 --- a/swapmon.py +++ b/swapmon.py @@ -10,7 +10,7 @@ # Faiyaz Ahmed # Copyright (C) 2004-2006 The Trustees of Princeton University # -# $Id: swapmon.py,v 1.11 2006/12/02 19:11:47 mlhuang Exp $ +# $Id$ # import syslog @@ -35,8 +35,8 @@ from pl_mom import * # Defaults debug = False verbose = 0 -datafile = "/var/lib/misc/swapmon.dat" - +DATAFILE = "/var/lib/misc/swapmon.dat" +VERSION = "$Id$" # Seconds between process analysis period = 30 @@ -51,7 +51,7 @@ reset_thresh = 80 reboot_thresh = 95 # Time to wait before checking slice again after reset -reset_timeout = 15 +reset_timeout = 25 # Number of strikes before killing (strike, strike, kill) kill_thresh = 2 @@ -97,6 +97,8 @@ physical memory at %(rss)s (%(percent)4.1f%%) (%(sz)s writable). Please reply to this message explaining the nature of your experiment, and what you are doing to address the problem. +http://summer.cs.princeton.edu/status/tabulator.cgi?table=slices/table_%(slice)s + %(slice)s processes prior to reset: %(table)s @@ -188,8 +190,8 @@ class Reset: def checkkill(self,params): if self.killtimeleft > 0 and self.resetcount >= kill_thresh: if debug: - print kill_subject % params - print kill_body % params + print kill_subject % params + print kill_body % params try: pid = os.fork() if pid == 0: @@ -227,18 +229,18 @@ class Reset: if debug: print reset_subject % params print reset_body % params - try: - pid = os.fork() - if pid == 0: - print "Resetting slice " + self.name - vserver = VServer(self.name) - vserver.stop() - vserver.start(wait = False) - os._exit(0) - else: - os.waitpid(pid,0) - except Exception, err: - print "Warning: Exception received while resetting slice %s:" \ + try: + pid = os.fork() + if pid == 0: + print "Resetting slice " + self.name + vserver = VServer(self.name) + vserver.stop() + vserver.start(wait = False) + os._exit(0) + else: + os.waitpid(pid,0) + except Exception, err: + print "Warning: Exception received while resetting slice %s:" \ % self.name, err if (time.time() - self.resetmail) > email_timeout: slicemail(self.name, reset_subject % params, reset_body % params) @@ -261,7 +263,7 @@ Options: --system-slice=SLICE System slice that should not be reset --status Print memory usage statistics and exit -h, --help This message -""".lstrip() % (sys.argv[0], debug, verbose, datafile, format_period(period)) +""".lstrip() % (sys.argv[0], debug, verbose, DATAFILE, format_period(period)) def slicestat(names = None): """ @@ -269,13 +271,13 @@ def slicestat(names = None): slices). vsize, sz, and rss are in KiB. Returns {xid: {'xid': slice_id, - 'name': slice_name, - 'procs': [{'pid': pid, 'xid': slice_id, 'user', username, 'cmd': command, + 'name': slice_name, + 'procs': [{'pid': pid, 'xid': slice_id, 'user', username, 'cmd': command, 'vsize': virtual_kib, 'sz': potential_kib, 'rss': physical_kib, 'pcpu': cpu_percent, 'pmem': mem_percent}] - 'vsize': total_virtual_kib, - 'sz': total_potential_kib, - 'rss': total_physical_kib}} + 'vsize': total_virtual_kib, + 'sz': total_potential_kib, + 'rss': total_physical_kib}} """ # Mandatory fields. xid is a virtual field inserted by vps. Make @@ -370,10 +372,8 @@ def memtotal(): """ Returns total physical and swap memory on the system in KiB. """ - mem = 0 swap = 0 - meminfo = open("/proc/meminfo", "r") for line in meminfo.readlines(): try: @@ -385,17 +385,14 @@ def memtotal(): elif name == "SwapTotal:": swap = int(value) meminfo.close() - return (mem, swap) def swap_used(): """ Returns swap utilization on the system as a whole percentage (0-100). """ - total_swap = 0 total_used = 0 - try: swaps = open("/proc/swaps", "r") # Eat header line @@ -409,17 +406,17 @@ def swap_used(): total_used += int(used) except ValueEror, err: pass - except (IOError, KeyError), err: - pass + except (IOError, KeyError), err: pass - return 100 * total_used / total_swap + swapused = 100 * total_used / total_swap + if debug: print "%s percent swap used" % swapused + return swapused def summary(slices = None, total_mem = None, total_swap = None): """ Return a summary of memory usage by slice. """ - if not slices: - slices = slicestat() + if not slices: slices = slicestat() slicelist = slices.values() slicelist.sort(lambda a, b: b['sz'] - a['sz']) if total_mem is None or total_swap is None: @@ -433,13 +430,81 @@ def summary(slices = None, total_mem = None, total_swap = None): 100. * slice['rss'] / total_mem, format_bytes(slice['sz'] * 1024, si = False), 100. * slice['sz'] / (total_mem + total_swap)) - - return table +def formtable(slice, percent): + ''' + Makes pretty message to email with human readable ps values. + ''' + table = "%5s %10s %10s %10s %4s %4s %s\n\n" % \ + ("PID", "VIRT", "SZ", "RES", '%CPU', '%MEM', 'COMMAND') + for proc in slice['procs']: + table += "%5s %10s %10s %10s %4.1f %4.1f %s\n" % \ + (proc['pid'], + format_bytes(proc['vsize'] * 1024, si = False), + format_bytes(proc['sz'] * 1024, si = False), + format_bytes(proc['rss'] * 1024, si = False), + proc['pcpu'], + proc['pmem'], + proc['cmd']) + + prettytable = {'hostname': socket.gethostname(), + 'date': time.asctime(time.gmtime()) + " GMT", + 'table': table, + 'slice': slice['name'], + 'rss': format_bytes(slice['rss'] * 1024, si = False), + 'sz': format_bytes(slice['sz'] * 1024, si = False), + 'percent': percent} + return prettytable + +def readdat(): + ''' + Return dictionary of vps (slicestat) from datfile left behind by OOM + before rebooting. If none file, just grab the latest dict (slicestat) + and return that. If dat file found, means we rebooted, send an email to + pl_mom@pl. + ''' + try: + f = open(DATAFILE, "r+") + if verbose: + print "Loading %s" % DATAFILE + (v, slices) = pickle.load(f) + f.close() + # Check version of data file + if v != VERSION: + print "Not using old version '%s' data file %s" % (v, DATAFILE) + raise Exception + + params = {'hostname': socket.gethostname(), + 'date': time.asctime(time.gmtime()) + " GMT", + 'table': summary(slices, total_mem, total_swap)} + if debug: + print rebooted_subject % params + print rebooted_body % params + else: + slicemail(None, rebooted_subject % params, rebooted_body % params) + + # Delete data file + os.unlink(DATAFILE) + except Exception: + slices = slicestat() + + return slices + + +def writedat(slices): + """ + Write (slices) to pickled datfile. + """ + if verbose: print "Saving %s" % DATAFILE + f = open(DATAFILE, "w") + pickle.dump((VERSION, slices), f) + f.close() + + def main(): # Defaults - global debug, verbose, datafile + global debug, verbose, DATAFILE, VERSION global period, change_thresh, reset_thresh, reboot_thresh, rss_min, system_slices # All slices names = [] @@ -459,7 +524,7 @@ def main(): elif opt == "-v" or opt == "--verbose": verbose += 1 elif opt == "-f" or opt == "--file": - datafile = optval + DATAFILE = optval elif opt == "-s" or opt == "--slice": names.append(optval) elif opt == "-p" or opt == "--period": @@ -494,33 +559,7 @@ def main(): # Get total memory (total_mem, total_swap) = memtotal() - - try: - f = open(datafile, "r+") - if verbose: - print "Loading %s" % datafile - (version, slices) = pickle.load(f) - f.close() - # Check version of data file - if version != "$Id: swapmon.py,v 1.11 2006/12/02 19:11:47 mlhuang Exp $": - print "Not using old version '%s' data file %s" % (version, datafile) - raise Exception - - params = {'hostname': socket.gethostname(), - 'date': time.asctime(time.gmtime()) + " GMT", - 'table': summary(slices, total_mem, total_swap)} - - if debug: - print rebooted_subject % params - print rebooted_body % params - else: - slicemail(None, rebooted_subject % params, rebooted_body % params) - - # Delete data file - os.unlink(datafile) - except Exception: - version = "$Id: swapmon.py,v 1.11 2006/12/02 19:11:47 mlhuang Exp $" - slices = {} + slices = readdat() # Query process table every 30 seconds, or when a large change in # swap utilization is detected. @@ -536,95 +575,72 @@ def main(): while True: used = swap_used() - - for resetslice in resetlist.keys(): - resetlist[resetslice].update() + if last_used is None: last_used = used + + # If we've reset you recently, update timers. + for resetslice in resetlist.keys(): + resetlist[resetslice].update() + # If you've been good, remove you from our list. + if resetlist[resetslice].killtimeleft == 0 and \ + resetlist[resetslice].resettimeleft == 0: + del resetlist[resetslice] + + if verbose: print "%d%% swap consumed" % used + + if used >= reboot_thresh: + # Dump slice state before rebooting + writedat(slices) + # Goodbye, cruel world + print "%d%% swap consumed, rebooting" % used + if not debug: bwlimit.run("/bin/sync; /sbin/reboot -f") + elif used >= reset_thresh: + # Try and find a hog + slicelist = slices.values() + # Puts largest on top. + slicelist.sort(lambda a, b: b['rss'] - a['rss']) + for slice in slicelist: + percent = 100. * slice['rss'] / total_mem + if slice['rss'] < rss_min: continue + print "%d%% swap consumed, slice %s is using %s (%d%%) of memory" % \ + (used, + slice['name'], + format_bytes(slice['rss'] * 1024, si = False), + percent) + slice['procs'].sort(lambda a, b: b['rss'] - a['rss']) + # Make a pretty table. + params = formtable(slice, percent) + # Match slice name against system slice patterns + is_system_slice = filter(None, + [re.match(pattern, slice['name']) for pattern in system_slices]) - if last_used is None: - last_used = used - - if verbose: - print "%d%% swap consumed" % used - - if used >= reboot_thresh: - # Dump slice state before rebooting - if verbose: print "Saving %s" % datafile - f = open(datafile, "w") - pickle.dump((version, slices), f) - f.close() - - # Goodbye, cruel world - print "%d%% swap consumed, rebooting" % used - if not debug: bwlimit.run("/bin/sync; /sbin/reboot -f") - - elif used >= reset_thresh: - if debug: print "Memory used = %s" %(used) - # Try and find a hog - slicelist = slices.values() - slicelist.sort(lambda a, b: b['rss'] - a['rss']) - for slice in slicelist: - percent = 100. * slice['rss'] / total_mem - if slice['rss'] < rss_min: continue - print "%d%% swap consumed, slice %s is using %s (%d%%) of memory" % \ - (used, - slice['name'], - format_bytes(slice['rss'] * 1024, si = False), - percent) - - slice['procs'].sort(lambda a, b: b['rss'] - a['rss']) - table = "%5s %10s %10s %10s %4s %4s %s\n\n" % \ - ("PID", "VIRT", "SZ", "RES", '%CPU', '%MEM', 'COMMAND') - for proc in slice['procs']: - table += "%5s %10s %10s %10s %4.1f %4.1f %s\n" % \ - (proc['pid'], - format_bytes(proc['vsize'] * 1024, si = False), - format_bytes(proc['sz'] * 1024, si = False), - format_bytes(proc['rss'] * 1024, si = False), - proc['pcpu'], - proc['pmem'], - proc['cmd']) - - params = {'hostname': socket.gethostname(), - 'date': time.asctime(time.gmtime()) + " GMT", - 'table': table, - 'slice': slice['name'], - 'rss': format_bytes(slice['rss'] * 1024, si = False), - 'sz': format_bytes(slice['sz'] * 1024, si = False), - 'percent': percent} - - # Match slice name against system slice patterns - is_system_slice = filter(None, - [re.match(pattern, slice['name']) for pattern in system_slices]) - - if is_system_slice: # Do not reset system slices, just warn once - if slice['name'] not in warned: - warned.append(slice['name']) - if debug: - print alarm_subject % params - print alarm_body % params + if is_system_slice: + if slice['name'] not in warned: + warned.append(slice['name']) + print "Warning slice " + slice['name'] + if debug: + print alarm_subject % params + print alarm_body % params + else: + slicemail(slice['name'], alarm_subject % params, + alarm_body % params) else: - print "Warning slice " + slice['name'] - slicemail(slice['name'], alarm_subject % params, - alarm_body % params) - else: - # Reset slice - if not resetlist.has_key(slice['name']): - resetlist[slice['name']] = Reset(slice['name']) - resetlist[slice['name']].reset(params) - slices = slicestat(names) + # Reset slice + if not resetlist.has_key(slice['name']): + resetlist[slice['name']] = Reset(slice['name']) + resetlist[slice['name']].reset(params) + # wait period vefore recalculating swap. If in danger, recalc. if timer <= 0 or used >= (last_used + change_thresh): if used >= (last_used + change_thresh): print "%d%% swap consumed, %d%% in last %d seconds" % \ - (used, used - last_used, period - timer) + (used, used - last_used, period - timer) # Get slice state slices = slicestat(names) # Reset timer timer = period # Keep track of large changes in swap utilization last_used = used - timer -= 1 time.sleep(1)