#!/usr/bin/env python3
import logging
import sys
import argparse
import time
import rpc
SPDK_CPU_STAT = "/proc/stat"
SPDK_UPTIME = "/proc/uptime"
SPDK_CPU_STAT_HEAD = ['cpu_stat:', 'user_stat', 'nice_stat',
'system_stat', 'iowait_stat', 'steal_stat', 'idle_stat']
SPDK_BDEV_KB_STAT_HEAD = ['Device', 'tps', 'KB_read/s',
'KB_wrtn/s', 'KB_dscd/s', 'KB_read', 'KB_wrtn', 'KB_dscd']
SPDK_BDEV_MB_STAT_HEAD = ['Device', 'tps', 'MB_read/s',
'MB_wrtn/s', 'MB_dscd/s', 'MB_read', 'MB_wrtn', 'MB_dscd']
SPDK_MAX_SECTORS = 0xffffffff
class BdevStat:
def __init__(self, dictionary):
if dictionary is None:
return
for k, value in dictionary.items():
if k == 'name':
self.bdev_name = value
elif k == 'bytes_read':
self.rd_sectors = value >> 9
elif k == 'bytes_written':
self.wr_sectors = value >> 9
elif k == 'bytes_unmapped':
self.dc_sectors = value >> 9
elif k == 'num_read_ops':
self.rd_ios = value
elif k == 'num_write_ops':
self.wr_ios = value
elif k == 'num_unmap_ops':
self.dc_ios = value
elif k == 'read_latency_ticks':
self.rd_ticks = value
elif k == 'write_latency_ticks':
self.wr_ticks = value
elif k == 'unmap_latency_ticks':
self.dc_ticks = value
elif k == 'queue_depth':
self.ios_pgr = value
elif k == 'io_time':
self.tot_ticks = value
elif k == 'weighted_io_time':
self.rq_ticks = value
self.rd_merges = 0
self.wr_merges = 0
self.dc_merges = 0
self.upt = 0.0
def __getattr__(self, name):
return 0
def uptime():
with open(SPDK_UPTIME, 'r') as f:
return float(f.readline().split()[0])
def _stat_format(data, header, leave_first=False):
list_size = len(data)
header_len = len(header)
if list_size == 0:
raise AssertionError
list_len = len(data[0])
for ll in data:
if len(ll) != list_len:
raise AssertionError
for i, r in enumerate(ll):
ll[i] = str(r)
if (leave_first and list_len + 1 != header_len) or \
(not leave_first and list_len != header_len):
raise AssertionError
item_sizes = [0 for i in range(header_len)]
for i in range(0, list_len):
if leave_first and i == 0:
item_sizes[i] = len(header[i + 1])
data_len = 0
for x in data:
data_len = max(data_len, len(x[i]))
index = i + 1 if leave_first else i
item_sizes[index] = max(len(header[index]), data_len)
_format = ' '.join('%%-%ss' % item_sizes[i] for i in range(0, header_len))
print(_format % tuple(header))
if leave_first:
print('\n'.join(_format % ('', *tuple(ll)) for ll in data))
else:
print('\n'.join(_format % tuple(ll) for ll in data))
print()
sys.stdout.flush()
def read_cpu_stat(last_cpu_info, cpu_info):
jiffies = 0
for i in range(0, 7):
jiffies += cpu_info[i] - \
(last_cpu_info[i] if last_cpu_info else 0)
if last_cpu_info:
info_stat = [
"{:.2%}".format((cpu_info[0] - last_cpu_info[0]) / jiffies),
"{:.2%}".format((cpu_info[1] - last_cpu_info[1]) / jiffies),
"{:.2%}".format(((cpu_info[2] + cpu_info[5] + cpu_info[6]) -
(last_cpu_info[2] + last_cpu_info[5] + last_cpu_info[6])) / jiffies),
"{:.2%}".format((cpu_info[4] - last_cpu_info[4]) / jiffies),
"{:.2%}".format((cpu_info[7] - last_cpu_info[7]) / jiffies),
"{:.2%}".format((cpu_info[3] - last_cpu_info[3]) / jiffies),
]
else:
info_stat = [
"{:.2%}".format(cpu_info[0] / jiffies),
"{:.2%}".format(cpu_info[1] / jiffies),
"{:.2%}".format((cpu_info[2] + cpu_info[5]
+ cpu_info[6]) / jiffies),
"{:.2%}".format(cpu_info[4] / jiffies),
"{:.2%}".format(cpu_info[7] / jiffies),
"{:.2%}".format(cpu_info[3] / jiffies),
]
_stat_format([info_stat], SPDK_CPU_STAT_HEAD, True)
def check_positive(value):
v = int(value)
if v <= 0:
raise argparse.ArgumentTypeError("%s should be positive int value" % v)
return v
def get_cpu_stat():
with open(SPDK_CPU_STAT, "r") as cpu_file:
cpu_dump_info = []
line = cpu_file.readline()
while line:
line = line.strip()
if "cpu " in line:
cpu_dump_info = [int(data) for data in line[5:].split(' ')]
break
line = cpu_file.readline()
return cpu_dump_info
def read_bdev_stat(last_stat, stat, mb, use_upt):
if use_upt:
upt_cur = uptime()
else:
upt_cur = stat['ticks']
upt_rate = stat['tick_rate']
info_stats = []
unit = 2048 if mb else 2
bdev_stats = []
if last_stat:
for bdev in stat['bdevs']:
_stat = BdevStat(bdev)
_stat.upt = upt_cur
bdev_stats.append(_stat)
_last_stat = None
for last_bdev in last_stat:
if (_stat.bdev_name == last_bdev.bdev_name):
_last_stat = last_bdev
break
# get the interval time
if use_upt:
upt = _stat.upt - _last_stat.upt
else:
upt = (_stat.upt - _last_stat.upt) / upt_rate
rd_sec = _stat.rd_sectors - _last_stat.rd_sectors
if (_stat.rd_sectors < _last_stat.rd_sectors) and (_last_stat.rd_sectors <= SPDK_MAX_SECTORS):
rd_sec &= SPDK_MAX_SECTORS
wr_sec = _stat.wr_sectors - _last_stat.wr_sectors
if (_stat.wr_sectors < _last_stat.wr_sectors) and (_last_stat.wr_sectors <= SPDK_MAX_SECTORS):
wr_sec &= SPDK_MAX_SECTORS
dc_sec = _stat.dc_sectors - _last_stat.dc_sectors
if (_stat.dc_sectors < _last_stat.dc_sectors) and (_last_stat.dc_sectors <= SPDK_MAX_SECTORS):
dc_sec &= SPDK_MAX_SECTORS
tps = ((_stat.rd_ios + _stat.dc_ios + _stat.wr_ios) -
(_last_stat.rd_ios + _last_stat.dc_ios + _last_stat.wr_ios)) / upt
info_stat = [
_stat.bdev_name,
"{:.2f}".format(tps),
"{:.2f}".format(
(_stat.rd_sectors - _last_stat.rd_sectors) / upt / unit),
"{:.2f}".format(
(_stat.wr_sectors - _last_stat.wr_sectors) / upt / unit),
"{:.2f}".format(
(_stat.dc_sectors - _last_stat.dc_sectors) / upt / unit),
"{:.2f}".format(rd_sec / unit),
"{:.2f}".format(wr_sec / unit),
"{:.2f}".format(dc_sec / unit),
]
info_stats.append(info_stat)
else:
for bdev in stat['bdevs']:
_stat = BdevStat(bdev)
_stat.upt = upt_cur
bdev_stats.append(_stat)
if use_upt:
upt = _stat.upt
else:
upt = _stat.upt / upt_rate
tps = (_stat.rd_ios + _stat.dc_ios + _stat.wr_ios) / upt
info_stat = [
_stat.bdev_name,
"{:.2f}".format(tps),
"{:.2f}".format(_stat.rd_sectors / upt / unit),
"{:.2f}".format(_stat.wr_sectors / upt / unit),
"{:.2f}".format(_stat.dc_sectors / upt / unit),
"{:.2f}".format(_stat.rd_sectors / unit),
"{:.2f}".format(_stat.wr_sectors / unit),
"{:.2f}".format(_stat.dc_sectors / unit),
]
info_stats.append(info_stat)
_stat_format(
info_stats, SPDK_BDEV_MB_STAT_HEAD if mb else SPDK_BDEV_KB_STAT_HEAD)
return bdev_stats
def get_bdev_stat(client, name):
return rpc.bdev.bdev_get_iostat(client, name=name)
def io_stat_display(args, cpu_info, stat):
if args.cpu_stat and not args.bdev_stat:
_cpu_info = get_cpu_stat()
read_cpu_stat(cpu_info, _cpu_info)
return _cpu_info, None
if args.bdev_stat and not args.cpu_stat:
_stat = get_bdev_stat(args.client, args.name)
bdev_stats = read_bdev_stat(
stat, _stat, args.mb_display, args.use_uptime)
return None, bdev_stats
_cpu_info = get_cpu_stat()
read_cpu_stat(cpu_info, _cpu_info)
_stat = get_bdev_stat(args.client, args.name)
bdev_stats = read_bdev_stat(stat, _stat, args.mb_display, args.use_uptime)
return _cpu_info, bdev_stats
def io_stat_display_loop(args):
interval = args.interval
time_in_second = args.time_in_second
args.client = rpc.client.JSONRPCClient(
args.server_addr, args.port, args.timeout, log_level=getattr(logging, args.verbose.upper()))
last_cpu_stat = None
bdev_stats = None
cur = 0
while True:
last_cpu_stat, bdev_stats = io_stat_display(
args, last_cpu_stat, bdev_stats)
time.sleep(interval)
cur += interval
if cur >= time_in_second:
break
if __name__ == "__main__":
parser = argparse.ArgumentParser(
description='SPDK iostats command line interface')
parser.add_argument('-c', '--cpu-status', dest='cpu_stat',
action='store_true', help="Only display cpu status",
required=False, default=False)
parser.add_argument('-d', '--bdev-status', dest='bdev_stat',
action='store_true', help="Only display Blockdev io stats",
required=False, default=False)
parser.add_argument('-k', '--kb-display', dest='kb_display',
action='store_true', help="Display drive stats in KiB",
required=False, default=False)
parser.add_argument('-m', '--mb-display', dest='mb_display',
action='store_true', help="Display drive stats in MiB",
required=False, default=False)
parser.add_argument('-u', '--use-uptime', dest='use_uptime',
action='store_true', help='Use uptime or spdk ticks(default) as \
the interval variable to calculate iostat changes.',
required=False, default=False)
parser.add_argument('-i', '--interval', dest='interval',
type=check_positive, help='Time interval (in seconds) on which \
to poll I/O stats. Used in conjunction with -t',
required=False, default=0)
parser.add_argument('-t', '--time', dest='time_in_second',
type=check_positive, help='The number of second to display stats \
before returning. Used in conjunction with -i',
required=False, default=0)
parser.add_argument('-s', "--server", dest='server_addr',
help='RPC domain socket path or IP address',
default='/var/tmp/spdk.sock')
parser.add_argument('-p', "--port", dest='port',
help='RPC port number (if server_addr is IP address)',
default=4420, type=int)
parser.add_argument('-b', '--name', dest='name',
help="Name of the Blockdev. Example: Nvme0n1", required=False)
parser.add_argument('-o', '--timeout', dest='timeout',
help='Timeout as a floating point number expressed in seconds \
waiting for response. Default: 60.0',
default=60.0, type=float)
parser.add_argument('-v', dest='verbose', action='store_const', const="INFO",
help='Set verbose mode to INFO', default="ERROR")
args = parser.parse_args()
if ((args.interval == 0 and args.time_in_second != 0) or
(args.interval != 0 and args.time_in_second == 0)):
raise argparse.ArgumentTypeError(
"interval and time_in_second should be greater than 0 at the same time")
if args.kb_display and args.mb_display:
parser.print_help()
exit()
io_stat_display_loop(args)