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multi_thread_workload.py
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multi_thread_workload.py
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#!/usr/bin/python
# -*- coding: utf-8 -*-
import os
import sys
import time
import random
import copy
import smallfile
from smallfile import ensure_deleted, ensure_dir_exists, OK, NOTOK, \
SMFResultException, abort_test
import invoke_process
import sync_files
import output_results
def create_worker_list(prm):
# for each thread set up SmallfileWorkload instance,
# create a thread instance, and delete the thread-ready file
thread_list = []
for k in range(0, prm.thread_count):
nextinv = copy.copy(prm.master_invoke)
nextinv.tid = '%02d' % k
if not prm.master_invoke.is_shared_dir:
nextinv.src_dirs = [d + os.sep + prm.master_invoke.onhost
+ os.sep + 'thrd_' + nextinv.tid
for d in nextinv.src_dirs]
nextinv.dest_dirs = [d + os.sep + prm.master_invoke.onhost
+ os.sep + 'thrd_' + nextinv.tid
for d in nextinv.dest_dirs]
t = invoke_process.subprocess(nextinv)
thread_list.append(t)
ensure_deleted(nextinv.gen_thread_ready_fname(nextinv.tid))
return thread_list
# what follows is code that gets done on each host
def run_multi_thread_workload(prm):
master_invoke = prm.master_invoke
prm_slave = prm.is_slave
verbose = master_invoke.verbose
host = master_invoke.onhost
if not prm_slave:
sync_files.create_top_dirs(master_invoke, False)
if prm_slave:
time.sleep(1.1)
for d in master_invoke.top_dirs:
ensure_dir_exists(d)
for dlist in [master_invoke.src_dirs, master_invoke.dest_dirs]:
for d in dlist:
ensure_dir_exists(d)
if verbose:
print(host + ' saw ' + str(d))
# for each thread set up SmallfileWorkload instance,
# create a thread instance, and delete the thread-ready file
thread_list = create_worker_list(prm)
my_host_invoke = thread_list[0].invoke
# start threads, wait for them to reach starting gate
# to do this, look for thread-ready files
for t in thread_list:
ensure_deleted(t.invoke.gen_thread_ready_fname(t.invoke.tid))
for t in thread_list:
t.start()
if verbose:
print('started %d worker threads on host %s' %
(len(thread_list), host))
# wait for all threads to reach the starting gate
# this makes it more likely that they will start simultaneously
startup_timeout = prm.startup_timeout
if smallfile.is_windows_os:
print('adding time for Windows synchronization')
startup_timeout += 30
abort_fname = my_host_invoke.abort_fn()
threads_ready = False # really just to set scope of variable
for sec in range(0, startup_timeout * 2):
threads_ready = True
for t in thread_list:
fn = t.invoke.gen_thread_ready_fname(t.invoke.tid)
if not os.path.exists(fn):
threads_ready = False
break
if threads_ready:
break
if os.path.exists(abort_fname):
break
if verbose:
print('threads not ready...')
time.sleep(0.5)
# if all threads didn't make it to the starting gate
if not threads_ready:
abort_test(abort_fname, thread_list)
raise Exception('threads did not reach starting gate within %d sec'
% startup_timeout)
# declare that this host is at the starting gate
if prm_slave:
host_ready_fn = my_host_invoke.gen_host_ready_fname()
if my_host_invoke.verbose:
print('host %s creating ready file %s' %
(my_host_invoke.onhost, host_ready_fn))
smallfile.touch(host_ready_fn)
sg = my_host_invoke.starting_gate
if not prm_slave: # special case of no --host-set parameter
try:
sync_files.write_sync_file(sg, 'hi there')
if verbose:
print('wrote starting gate file')
except IOError as e:
print('error writing starting gate for threads: %s' % str(e))
# wait for starting_gate file to be created by test driver
# every second we resume scan from last host file not found
if verbose:
print('awaiting ' + sg)
if prm_slave:
for sec in range(0, prm.host_startup_timeout + 10):
# hack to ensure that directory is up to date
# ndlist = os.listdir(my_host_invoke.network_dir)
# if verbose: print(str(ndlist))
if os.path.exists(sg):
break
time.sleep(0.5)
if not os.path.exists(sg):
abort_test(my_host_invoke.abort_fn(), thread_list)
raise Exception('starting signal not seen within %d seconds'
% prm.host_startup_timeout)
if verbose:
print('starting test on host ' + host + ' in 2 seconds')
time.sleep(2 + random.random()) # let other hosts see starting gate file
# FIXME: don't timeout the test,
# instead check thread progress and abort if you see any of them stalled
# but if servers are heavily loaded you can't rely on filesystem
# wait for all threads on this host to finish
for t in thread_list:
if verbose:
print('waiting for thread %s' % t.invoke.tid)
t.invoke = t.receiver.recv() # to get results from sub-process
t.join()
# if not a slave of some other host, print results (for this host)
exit_status = OK
if not prm_slave:
try:
invoke_list = [t.invoke for t in thread_list]
output_results.output_results(invoke_list,
['localhost'],
prm.thread_count,
smallfile.pct_files_min)
except SMFResultException as e:
print('ERROR: ' + str(e))
exit_status = NOTOK
else:
# if we are participating in a multi-host test
# then write out this host's result in pickle format
# so test driver can pick up result
result_filename = \
master_invoke.host_result_filename(prm.as_host)
if verbose:
print('writing invokes to: ' + result_filename)
invok_list = [t.invoke for t in thread_list]
if verbose:
print('saving result to filename %s' % result_filename)
for ivk in invok_list:
ivk.buf = None
ivk.biggest_buf = None
sync_files.write_pickle(result_filename, invok_list)
time.sleep(1.2) # for benefit of NFS with actimeo=1
sys.exit(exit_status)