关于numa的一些总结

柔情只为你懂 2022-01-14 03:29 482阅读 0赞

1.不同的操作系统对numa的支持不一样.

1.1 solaris提供了locality group api. 可以使用它方便地进行 locality操作.api可以参考[http://docs.oracle.com/cd/E19082-01/820-1691/lgroups-1/index.html][http_docs.oracle.com_cd_E19082-01_820-1691_lgroups-1_index.html]. 另外还有一点需要注意, solaris提供的系统调用mmap分配内存的时候会在多个node上都分配内存.所以在调度的时候,可以使用numa的locality特性来访问数据,以提高性能.

1.2 linux对numa也提供了一些函数,但是它提供的操作并不好用.如mbind,set\_mempolicy.sched\_setaffinity等.

不过linux上提供了一个api libnuma.可以用它来进行相关调用.不过个人感觉也不是很好用.

具体的比较可以参考论文"Exploring Thread and Memory Placement on NUMA Architectures: Solaris and Linux,  
UltraSPARC/FirePlane and Opteron/HyperTransport".

2.libnuma提供的api:[http://linux.die.net/man/3/numa][http_linux.die.net_man_3_numa].

3.从指定的内存地址得到其对应的node结点:[http://stackoverflow.com/questions/7986903/can-i-get-the-numa-node-from-a-pointer-address-in-c-on-linux][http_stackoverflow.com_questions_7986903_can-i-get-the-numa-node-from-a-pointer-address-in-c-on-linux].

[http://stackoverflow.com/questions/8154162/numa-aware-cache-aligned-memory-allocation][http_stackoverflow.com_questions_8154162_numa-aware-cache-aligned-memory-allocation].

4.给定一个进程,绑定到指定的node上.

[http_docs.oracle.com_cd_E19082-01_820-1691_lgroups-1_index.html]: http://docs.oracle.com/cd/E19082-01/820-1691/lgroups-1/index.html
[http_linux.die.net_man_3_numa]: http://linux.die.net/man/3/numa
[http_stackoverflow.com_questions_7986903_can-i-get-the-numa-node-from-a-pointer-address-in-c-on-linux]: http://stackoverflow.com/questions/7986903/can-i-get-the-numa-node-from-a-pointer-address-in-c-on-linux
[http_stackoverflow.com_questions_8154162_numa-aware-cache-aligned-memory-allocation]: http://stackoverflow.com/questions/8154162/numa-aware-cache-aligned-memory-allocation