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分类: 服务器与存储
2015-08-04 15:57:49
可以这样,把指定的CPU核绑定到你的进程。
taskset -cp <CPU ID | CPU IDs> <Process ID>
下面用一个简单的例子来说明怎样做到。
class Test {
public static void main(String args[]) {
int i = 0;
while (true) {
i++;
}
}
}
# javac Test.java
# java Test &
[1] 26531
如果未安装htop工具,执行下面的命令:
# apt-get install htop
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
htop
0 upgraded, 1 newly installed, 0 to remove and 41 not upgraded.
Need to get 66.9 kB of archives.
After this operation, 183 kB of additional disk space will be used.
Get:1 precise/universe htop amd64 1.0.1-1 [66.9 kB]
Fetched 66.9 kB in 0s (163 kB/s)
Selecting previously unselected package htop.
(Reading database ... 57100 files and directories currently installed.)
Unpacking htop (from .../htop_1.0.1-1_amd64.deb) ...
Processing triggers for man-db ...
Setting up htop (1.0.1-1) ...
安装完成后,执行命令:
# htop
上面的视图可以看到,CPU2的利用率达到100%,且这个进程有可能被分配到其它CPU核上运行,这个分配是不定的。
运行以下命令,把此Java进程(进程ID号为26502)永久的分配给5号CPU核(CPU核号从0开始计算,因此序号4指的是5号CPU核)
# taskset -cp 5 26531
pid 26531's current affinity list: 0-7
pid 26531's new affinity list: 5
从上面的视图中可以看到6号CPU核的利用率为100%。