linux – Kondemand进程占用了我的大部分CPU教程
以下是顶部的输出：
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3551 mysql 20 0 10.0g 84m 4052 S 9.4 0.1 544:39.87 mysqld
2311 root 20 0 0 0 0 R 3.1 0.0 184:36.36 kondemand/26
2296 root 20 0 0 0 0 R 3.0 0.0 183:58.76 kondemand/11
2297 root 20 0 0 0 0 R 3.0 0.0 183:51.36 kondemand/12
2299 root 20 0 0 0 0 R 3.0 0.0 183:31.22 kondemand/14
2304 root 20 0 0 0 0 R 3.0 0.0 183:57.42 kondemand/19
2310 root 20 0 0 0 0 R 3.0 0.0 182:07.21 kondemand/25
2312 root 20 0 0 0 0 R 3.0 0.0 184:01.70 kondemand/27
2314 root 20 0 0 0 0 R 3.0 0.0 182:34.96 kondemand/29
5255 root 20 0 84432 11m 2800 R 3.0 0.0 58:53.71 cPhulkd - proce
2286 root 20 0 0 0 0 R 2.9 0.0 179:48.98 kondemand/1
2298 root 20 0 0 0 0 R 2.9 0.0 183:01.25 kondemand/13
2300 root 20 0 0 0 0 R 2.9 0.0 183:05.85 kondemand/15
2302 root 20 0 0 0 0 R 2.9 0.0 181:37.64 kondemand/17
2305 root 20 0 0 0 0 S 2.9 0.0 182:42.13 kondemand/20
2313 root 20 0 0 0 0 S 2.9 0.0 183:37.13 kondemand/28
3264 root 20 0 131m 6236 3712 R 2.9 0.0 13:49.84 cpsrvd (SSL) -
2287 root 20 0 0 0 0 R 2.8 0.0 155:21.99 kondemand/2
2289 root 20 0 0 0 0 R 2.8 0.0 181:43.40 kondemand/4
2290 root 20 0 0 0 0 R 2.8 0.0 180:02.76 kondemand/5
2293 root 20 0 0 0 0 R 2.8 0.0 179:04.75 kondemand/8
2294 root 20 0 0 0 0 R 2.8 0.0 182:32.23 kondemand/9
2295 root 20 0 0 0 0 R 2.8 0.0 184:39.21 kondemand/10
2306 root 20 0 0 0 0 R 2.8 0.0 182:20.72 kondemand/21
2307 root 20 0 0 0 0 R 2.8 0.0 182:39.74 kondemand/22
2309 root 20 0 0 0 0 R 2.8 0.0 179:00.80 kondemand/24
2315 root 20 0 0 0 0 R 2.8 0.0 182:54.88 kondemand/30
2965 root 20 0 150m 35m 3464 R 2.8 0.1 177:45.39 httpd
2291 root 20 0 0 0 0 R 2.7 0.0 180:53.41 kondemand/6
2292 root 20 0 0 0 0 R 2.7 0.0 179:38.78 kondemand/7
2303 root 20 0 0 0 0 R 2.7 0.0 184:05.13 kondemand/18
2316 root 20 0 0 0 0 S 2.7 0.0 182:06.84 kondemand/31
18451 cuntschi 20 0 187m 12m 5608 R 2.7 0.0 0:00.29 php
2285 root 20 0 0 0 0 R 2.6 0.0 176:55.27 kondemand/0
18430 cuntschi 20 0 186m 11m 4960 R 2.6 0.0 0:00.28 php
18445 cocksuck 20 0 175m 9332 5208 R 2.6 0.0 0:00.28 php
18459 romanced 20 0 184m 9m 4972 R 2.6 0.0 0:00.28 php
18463 sexsmovi 20 0 187m 13m 5512 R 2.6 0.0 0:00.28 php
18482 enterpri 20 0 185m 11m 5424 R 2.6 0.0 0:00.28 php
18488 enterpri 20 0 185m 12m 5456 R 2.6 0.0 0:00.28 php
2301 root 20 0 0 0 0 R 2.5 0.0 178:52.97 kondemand/16
2308 root 20 0 0 0 0 R 2.5 0.0 181:52.38 kondemand/23
18432 cuntschi 20 0 184m 10m 4956 R 2.5 0.0 0:00.27 php
18434 cocksuck 20 0 187m 12m 5796 R 2.5 0.0 0:00.27 php
18436 sexsmovi 20 0 186m 13m 5480 R 2.5 0.0 0:00.27 php
18439 cuntschi 20 0 184m 9868 4960 R 2.5 0.0 0:00.27 php
它是什么以及如何阻止它？
解决方法:
这是自动CPU频率缩放.我怀疑它使用的CPU实际上是闲置的CPU.您可以通过启动CPU基准测试程序来测试它.您应该看到kondemand实例的使用率降至0％. atop程序也将显示CPU缩放百分比.
不同的发行版处理方式不同而你没有发布你的发行版,因此我将以http://www.servernoobs.com/avoiding-cpu-speed-scaling-in-modern-linux-distributions-running-cpu-at-full-speed-tips/?doing\_wp\_cron=1428304535.5997378826141357421875作为起点.这个快速的脚本将普遍关闭,但你真的想弄清楚你的系统的启动脚本做了什么.
for CPUFREQ in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor;
do [ -f $CPUFREQ ] || continue; echo -n performance > $CPUFREQ; done
可能的情况是,这比没有节省电力更糟糕.除非你经常有非常大的工作量,否则你不会因为禁用额外的热量而获得更多的收益(除非在你的情况下真的被打破).