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# -*- coding: utf-8 -*-
#
# Copyright 2015 Red Hat, Inc.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""
Benchmark Disk functions.
"""
import json
import os
import subprocess
import sys
# NOTE(lucasagomes): The amount of time a specified workload will run before
# logging any performance numbers. Useful for letting performance settle
# before logging results, thus minimizing the runtime required for stable
# results. Note that the ramp_time is considered lead in time for a job,
# thus it will increase the total runtime if a special timeout or runtime
# is specified.
RAMP_TIME = 5
def is_booted_storage_device(disk):
"""Check if a given disk is booted."""
cmdline = ("grep -w /ahcexport /proc/mounts | cut -d ' ' -f 1 | "
"sed -e 's/[0-9]*//g'")
if '/dev/' not in disk:
disk = '/dev/%s' % disk
grep_cmd = subprocess.Popen(cmdline,
shell=True, stdout=subprocess.PIPE)
for booted_disk in grep_cmd.stdout:
booted_disk = booted_disk.decode(errors='ignore')
booted_disk = booted_disk.rstrip('\n').strip()
if booted_disk == disk:
return True
return False
def get_disks_name(hw_lst, without_bootable=False):
"""Get a list of disk names."""
disks = []
for entry in hw_lst:
if entry[0] == 'disk' and entry[2] == 'size':
if without_bootable and is_booted_storage_device(entry[1]):
sys.stderr.write("Skipping disk %s in destructive mode, "
"this is the booted device !\n" % entry[1])
elif 'I:' in entry[1]:
pass
else:
disks.append(entry[1])
return disks
def run_fio(hw_lst, disks_list, mode, io_size, time, rampup_time):
"""Run the 'fio' benchmark tool."""
filelist = [f for f in os.listdir(".") if f.endswith(".fio")]
for myfile in filelist:
os.remove(myfile)
fio = ("fio --ioengine=libaio --invalidate=1 --ramp_time=%d --iodepth=32 "
"--runtime=%d --time_based --direct=1 --output-format=json "
"--bs=%s --rw=%s --random_generator=tausworthe64" %
(rampup_time, time, io_size, mode))
global_disk_list = ''
for disk in disks_list:
if '/dev/' not in disk:
disk = '/dev/%s' % disk
# Flusing Disk's cache prior benchmark
os.system("hdparm -f %s >/dev/null 2>&1" % disk)
short_disk = disk.replace('/dev/', '')
fio = "%s --name=MYJOB-%s --filename='%s'" % (fio, short_disk, disk)
global_disk_list += '%s,' % short_disk
global_disk_list = global_disk_list.rstrip(',')
sys.stderr.write(
'Benchmarking storage %s for %s seconds in '
'%s mode with blocksize=%s\n' %
(global_disk_list, time, mode, io_size))
fio_cmd = subprocess.check_output(fio, shell=True)
data = json.loads(fio_cmd)
for job in data['jobs']:
current_disk = job['jobname'].replace("MYJOB-", "")
if len(disks_list) > 1:
mode_str = "simultaneous_%s_%s" % (mode, io_size)
else:
mode_str = "standalone_%s_%s" % (mode, io_size)
for item in ['read', 'write']:
if job[item]['runtime'] > 0:
hw_lst.append(('disk', current_disk, mode_str + '_KBps',
str(job[item]['bw'])))
hw_lst.append(('disk', current_disk, mode_str + '_IOps',
str(job[item]['iops'])))
def disk_perf(hw_lst, destructive=False, running_time=10):
"""Reporting disk performance."""
mode = "non destructive"
# Let's count the number of runs in safe mode
disks = get_disks_name(hw_lst)
disks_num = len(disks)
total_runtime = disks_num * (running_time + RAMP_TIME) * 2
if disks_num > 1:
total_runtime += 2 * (running_time + RAMP_TIME)
if destructive:
total_runtime = total_runtime * 2
mode = 'destructive'
sys.stderr.write('Running storage bench on %d disks in'
' %s mode for %d seconds\n' %
(disks_num, mode, total_runtime))
for disk in disks:
is_booted_storage_device(disk)
if destructive:
if is_booted_storage_device(disk):
sys.stderr.write("Skipping disk %s in destructive mode,"
" this is the booted device !" % disk)
else:
run_fio(hw_lst, ['%s' % disk], "write", "1M",
running_time, RAMP_TIME)
run_fio(hw_lst, ['%s' % disk], "randwrite", "4k",
running_time, RAMP_TIME)
run_fio(hw_lst, ['%s' % disk],
"read", "1M", running_time, RAMP_TIME)
run_fio(hw_lst, ['%s' % disk],
"randread", "4k", running_time, RAMP_TIME)
if disks_num > 1:
if destructive:
run_fio(hw_lst, get_disks_name(hw_lst, True),
"write", "1M", running_time, RAMP_TIME)
run_fio(hw_lst, get_disks_name(hw_lst, True),
"randwrite", "4k", running_time, RAMP_TIME)
run_fio(hw_lst, disks, "read", "1M", running_time, RAMP_TIME)
run_fio(hw_lst, disks, "randread", "4k", running_time, RAMP_TIME)
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