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#!/usr/bin/env python
import json
import argparse
import logging
import time
import commands
def parse_args():
parser = argparse.ArgumentParser(description='watch ceph perf')
parser.add_argument(
'-v', '--verbose',
action='store_true', default=None,
help='be more verbose',
)
parser.add_argument(
'-s', '--socket',
help='path to admin socket file',
)
parser.add_argument(
'vars',
nargs='+',
help='variable to watch, section.value',
)
parser.add_argument(
'-t', '--time',
action='store_true',
default=False,
help='include relative time column',
)
parser.add_argument(
'--absolute-time',
action='store_true',
default=False,
help='include absolute time column',
)
args = parser.parse_args()
return args
def main():
ctx = parse_args()
log = logging.getLogger(__name__)
loglevel = logging.INFO
if ctx.verbose:
loglevel = logging.DEBUG
logging.basicConfig(
level=loglevel,
)
log.info('ctx %s', ctx)
# check schema
(code, raw) = commands.getstatusoutput('./ceph --admin-daemon %s perf schema' % ctx.socket)
schema = json.loads(raw)
# normalize var list
vars = []
vartype = {}
for v in ctx.vars:
if v.find('.') < 0:
if v in schema:
for var in schema[v].iterkeys():
vv = '%s.%s' % (v, var)
vars.append(vv)
vartype[vv] = int(schema[v][var]['type'])
else:
(sec, var) = v.split('.')
if sec in schema and var in schema[sec]:
vars.append(v)
vartype[v] = int(schema[sec][var]['type'])
else:
log.warning('%s not present in schema', v)
log.info('vars are %s', vars)
log.info('vartype is %s', vartype)
varline = '#'
if ctx.time or ctx.absolute_time:
varline = varline + ' %8s' % 'time'
for v in vars:
varline = varline + (' %8s' % v)
print_count = 0
prev = None
start = time.time()
while True:
if print_count % 10 == 0:
print(varline)
print_count += 1
(code, raw) = commands.getstatusoutput('./ceph --admin-daemon %s perf dump' % ctx.socket)
perfstats = json.loads(raw)
if prev is None:
prev = perfstats
vline = ' '
now = time.time()
if ctx.absolute_time:
vline = '%10d' % int(now)
elif ctx.time:
vline = '%10d' % int(now - start)
for v in vars:
(sec, var) = v.split('.')
val = 0
if sec in perfstats and var in perfstats[sec]:
formatstr = '%' + str(max(len(v), 8))
if vartype[v] & 1:
formatstr = formatstr + 'f'
else:
formatstr = formatstr + 'd'
val = 0
if vartype[v] & 4:
den = (perfstats[sec][var]['avgcount'] - perfstats[sec][var]['avgcount'])
if den > 0:
val = (perfstats[sec][var]['sum'] - prev[sec][var]['sum']) / den
elif vartype[v] & 8:
val = perfstats[sec][var] - prev[sec][var]
else:
val = perfstats[sec][var]
vline = vline + ' ' + (formatstr % val)
print(vline)
prev = perfstats
time.sleep(1)
main()
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