性能测试工具Lmbench使用说明

cos

性能测试工具

Lmbench

的安装使用与参数说明

1

工具简介

Linux

性能测试工具

Lmbench

是一套简易可移植的，符合

ANSI/C

标准为

UNIX/POSIX

而制定的微型测评工具。一般来说，它衡量两个关键< /p>

特征：反应时间和带宽。

Lmbenc h

旨

在使系统开发者深入了解关键操作的基础成本。其官方网站 是：

/lmbench/

。

2

安装过程及一般错误解决办法

安装使用

Linux

性能测试工具

Lmbench

的安装相对 比较简单，到其官方网站下载压

缩包下面以在

/opt

目录下为列，说明安装方法

解压

tar -xzvf lmbench3

make results

如果在

make

的时候出错，提示类似

$$make results

make[1]: Entering directory `/home/kyuan/lmbench3/src'

gmake[2]: Entering directory `/home/kyuan/lmbench3/src'

gmake[2]: *** No rule to make target `../SCCS/', needed by '..

gmake[2]: Leaving directory `/home/kyuan/lmbench3/src'

make[1]: *** [lmbench] Error 2

make[1]: Leaving directory `/home/kyuan/lmbench3/src'

make: *** [results] Error 2

这

是

需

要

修

改

src/Makefile

将

这

么

一

行

(

在

231

行

的

样

< br>子

)

，

将

$$O/lmbench : ../scripts/lmbench

中的

去掉，就可以了。

如果编译没有错误，就会出现一些选择提示以对测试进行一个配置并生成配置脚本，首先出

现的如下（：

If you are running on an MP machine and you want to try running

multiple copies of lmbench in parallel, you can specify how many here.

Using this option will make the benchmark run 100x slower (sorry).

NOTE: WARNING! This feature is experimental and many results are

known to be incorrect or random!

MULTIPLE COPIES [default 1]

此处是提示你同时运行多少个并行的测试，对应为结果中的< /p>

scal load

项

接下来是选择作业调度控制方法，选

1

允许调度作业即 可。如下：

Options to control job placement

1) Allow scheduler to place jobs

2) Assign each benchmark process with any attendent child processes

to its own processor

3) Assign each benchmark process with any attendent child processes

to its own processor, except that it will be as far as possible

from other processes

4) Assign each benchmark and attendent processes to their own

processors

5) Assign each benchmark and attendent processes to their own

processors, except that they will be as far as possible from

each other and other processes

6) Custom placement: you assign each benchmark process with attendent

child processes to processors

7)

Custom placement: you assign each benchmark and attendent

8)

processes to processors

9)

Note: some benchmarks, such as bw_pipe, create attendent child

10)

processes for each benchmark process. For example, bw_pipe

11)

needs a second process to send data down the pipe to be read

12)

by the benchmark process. If you have three copies of the

13)

benchmark process running, then you actually have six processes;

14)

three attendent child processes sending data down the pipes and

15)

three benchmark processes reading data and doing the measurements.

16)

Job placement selection: 1

17)

再接下来就是指定内存，本次指定为

512M

< br>，如下

===================== ================================================

Several benchmarks operate on a range of memory. This memory should be

sized such that it is at least 4 times as big as the external cache[s]

on your system. It should be no more than 80% of your physical memory.

The bigger the range, the more accurate the results, but larger sizes

take somewhat longer to run the benchmark.

MB [default 2814]

512

下 一步为所要运行的子集，默认为全部，本次我们用默认值即可，如下

lmbench measures a wide variety of system performance, and the full suite

of benchmarks can take a long time on some platforms. Consequently, we

offer the capability to run only predefined subsets of benchmarks, one

for operating system specific benchmarks and one for hardware specific

benchmarks. We also offer the option of running only selected benchmarks

which is useful during operating system development.

Please remember that if you intend to publish the results you either need

to do a full run or one of the predefined OS or hardware subsets.

SUBSET (ALL|HARWARE|OS|DEVELOPMENT) [default all]

最后出 现如下画面即为测试开始了，下面只需耐心的等就可以了。

Confguration done, thanks.

There is a mailing list for discussing lmbench hosted at BitMover.

Send mail to to join the list.

Using config in

2013

年

11

月

11

日

星期一

10:06:07 CST

Latency measurements

2013

年

11

月

11

日

星期一

10:06:45 CST

Calculating file system latency

2013

年

11

月

11

日

星期一

10:06:49 CST

Local networking

2013

年

11

月

11

日

星期一

10:08:29 CST

Bandwidth measurements

3

测试结果查看

测试完毕执行

make see

可查看到测试结果报告

Lmbench

的结果及其说明、

本次测试结果如下

cd results && make summary percent 2>/dev/null | more

make[1]:

正在进入目录

`/opt/performance/lmbench3/results'

L M B E N C H 3 . 0 S U M M A R Y

------------------------------------

(Alpha software, do not distribute)

Basic system parameters

------------------------------------------ ------------------------------------

Host OS Description Mhz tlb cache mem scal

pages line par load

bytes

--------- ------------- ----------------------- ---- ----- ----- ------ ----

user2-VT3 Linux i686-pc-linux-gnu 1598 88 128 1

Processor, Processes - times in microseconds - smaller is better