RH442-6 Linux进程调度(2)

1.   Cache信息
[root@www ~]# getconf -a|grep -i cache
LEVEL1_ICACHE_SIZE                 32768     #一级cache：32KB
LEVEL1_ICACHE_ASSOC                8
LEVEL1_ICACHE_LINESIZE             64
LEVEL1_DCACHE_SIZE                 32768
LEVEL1_DCACHE_ASSOC                8
LEVEL1_DCACHE_LINESIZE             64
LEVEL2_CACHE_SIZE                  6291456   #二级cache：6MB
LEVEL2_CACHE_ASSOC                 24
LEVEL2_CACHE_LINESIZE              64
LEVEL3_CACHE_SIZE                  0
LEVEL3_CACHE_ASSOC                 0
LEVEL3_CACHE_LINESIZE              0
LEVEL4_CACHE_SIZE                  0
LEVEL4_CACHE_ASSOC                 0
#其他查看方法：
[root@www ~]# x86info –c
 
2.   查询Cache的命中率
[root@www~]#valgrind --tool=cachegrind --I1=32768,8,64 --D1=32768,8,64 --L2=2097152,8,64 cache2
==12949== Cachegrind, a cache and branch-prediction profiler
==12949== Copyright (C) 2002-2009, and GNU GPL'd, by Nicholas Nethercote et al.
==12949== Using Valgrind-3.5.0 and LibVEX; rerun with -h for copyright info
==12949== Command: cache2
==12949==
Starting
Finished
==12949==
==12949== I   refs:      6,188,124,129
==12949== I1  misses:              633
==12949== L2i misses:              629
==12949== I1  miss rate:          0.00%
==12949== L2i miss rate:          0.00%
==12949==
==12949== D   refs:      3,937,851,911  (3,375,260,605 rd   + 562,591,306 wr)
==12949== D1  misses:      562,500,831  (          647 rd   + 562,500,184 wr)