Centos 6下通过blktrace监控IO

落日映苍穹つ 2023-01-18 02:25 182阅读 0赞

# 1. blktrace安装 #

#yum install blktrace

#mount a /sys/kernel/debug -t debugfs

# 2. blktrace使用 #

1.通过blkiomon，可以告诉你IO size,完成花费时间,吞吐量, 还可以统计出这次关键参数的分布

#blktrace /dev/sde -a issue -a complete -w 3600 -o - | blkiomon -I 10 -h -

time: Fri Sep 13 09:50:23 2013
    device: 8,64
    sizes read (bytes): num 0, min -1, max 0, sum 0, squ 0, avg -nan, var -nan
    sizes write (bytes): num 156, min 4096, max 524288, sum 80764928, squ 42331633876992, avg 517723.9, var 3318593440.4
    d2c read (usec): num 0, min -1, max 0, sum 0, squ 0, avg -nan, var -nan
    d2c write (usec): num 156, min 127, max 84010, sum 6410332, squ 330367299862, avg 41091.9, var 429197174.1
    throughput read (bytes/msec): num 0, min -1, max 0, sum 0, squ 0, avg -nan, var -nan
    throughput write (bytes/msec): num 156, min 6240, max 189068, sum 3417217, squ 164794315173, avg 21905.2, var 576534399.3
    sizes histogram (bytes):
                0:     0         1024:     0         2048:     0         4096:     1
             8192:     0        16384:     0        32768:     1        65536:     0
           131072:     0       262144:     0       524288:   154      1048576:     0
          2097152:     0      4194304:     0      8388608:     0    > 8388608:     0
    d2c histogram (usec):
                0:     0            8:     0           16:     0           32:     0
               64:     0          128:     1          256:     0          512:     1
             1024:     0         2048:     0         4096:     1         8192:     7
            16384:    24        32768:    12        65536:   102       131072:     8
           262144:     0       524288:     0      1048576:     0      2097152:     0
          4194304:     0      8388608:     0     16777216:     0     33554432:     0
        >33554432:     0
    bidirectional requests: 0

sizes write(bytes):

num：表示写IO次数

min：最小Write IO 4096Bytes

Max：最大Write IO 524288Bytes

sum：总共Write IO 80764928Bytes

avg：平均IO 517723Bytes

d2c write(usec)

num：表示写IO次数

min：最小IO响应时间127微秒

max：最大io响应时间84010微秒

sum：IO响应总时间6410332微秒

avg：平均IO响应时间41091微秒

d2c histogram (usec)柱状图说明：

响应时间128微秒以内的IO 1次

响应时间512微秒以内的IO 1次

响应时间4096微秒以内的IO 1次

响应时间8192微秒以内的IO 7次

响应时间16384微秒以内的IO 24次

响应时间32768微秒以内的IO 12次

响应时间65536微秒以内的IO 102次

响应时间131072微秒以内的IO 8次

## blkparse使用 ##

# blktrace /dev/sde -o - | blkparse -i -

8,64   0        1     0.000000000  2480  Q   W 11853824 + 1024 [dd]
      8,64   0        2     0.000011603  2480  G   W 11853824 + 1024 [dd]
      8,64   0        3     0.000016037  2480  P   N [dd]
      8,64   0        4     0.000092645  2480  Q   W 11854848 + 1024 [dd]
      8,64   0        5     0.000095456  2480  G   W 11854848 + 1024 [dd]
      8,64   0        6     0.000102259  2480  I   W 11853824 + 1024 [dd]
      8,64   0        0     0.000108432     0  m   N cfq34A  / insert_request
      8,64   0        0     0.000110791     0  m   N cfq34A  / add_to_rr
      8,64   0        7     0.000113614  2480  I   W 11854848 + 1024 [dd]
      8,64   0        0     0.000114744     0  m   N cfq34A  / insert_request
      8,64   0        8     0.000115696  2480  U   N [dd] 2
      8,64   0        0     0.000118660     0  m   N cfq workload slice:60
      8,64   0        0     0.000120308     0  m   N cfq34A  / set_active wl_class:0 wl_type:0
      8,64   0        0     0.000123098     0  m   N cfq34A  / fifo=          (null)
      8,64   0        0     0.000124405     0  m   N cfq34A  / dispatch_insert
      8,64   0        0     0.000125979     0  m   N cfq34A  / dispatched a request
      8,64   0        0     0.000127375     0  m   N cfq34A  / activate rq, drv=1
      8,64   0        9     0.000127803  2480  D   W 11853824 + 1024 [dd]
      8,64   0        0     0.000153214     0  m   N cfq34A  / dispatch_insert
      8,64   0        0     0.000154664     0  m   N cfq34A  / dispatched a request
      8,64   0        0     0.000155569     0  m   N cfq34A  / activate rq, drv=2
      8,64   0       10     0.000155730  2480  D   W 11854848 + 1024 [dd]
      8,64   0        0     0.002036492     0  m   N cfq34A  / slice expired t=0
      8,64   0        0     0.002039138     0  m   N / served: vt=444186624 min_vt=444178432
      8,64   0        0     0.002041404     0  m   N cfq34A  / sl_used=2 disp=2 charge=2 iops=1 sect=2048
      8,64   0        0     0.002042463     0  m   N cfq34A  / del_from_rr
      8,64   0        0     0.002043051     0  m   N / del_from_rr group
      8,64   0       11     0.002073197  2436  C   W 11853824 + 1024 [0]
      8,64   0        0     0.002125838     0  m   N cfq34A  / complete rqnoidle 0
      8,64   0       12     0.003306086  2288  C   W 11854848 + 1024 [0]
      8,64   0        0     0.003358069     0  m   N cfq34A  / complete rqnoidle 0
    CPU0 (8,64):
     Reads Queued:           0,        0KiB  Writes Queued:           2,    1,024KiB
     Read Dispatches:        0,        0KiB  Write Dispatches:        2,    1,024KiB
     Reads Requeued:         0               Writes Requeued:         0
     Reads Completed:        0,        0KiB  Writes Completed:        2,    1,024KiB
     Read Merges:            0,        0KiB  Write Merges:            0,        0KiB
     Read depth:             0               Write depth:             2
     IO unplugs:             1               Timer unplugs:           0
    
    Throughput (R/W): 0KiB/s / 341,333KiB/s
    Events (8,64): 31 entries
    Skips: 6 forward (51 -  62.2%)

blktrace是个很强大的IO监控工具，还往后的工作中会经常用到，需要更加详细的了解应用。