我使用Ubuntu 8.04LTE

剛剛嘗試使用renice來改process的priority
可是我發現ps與top的結果都怪怪的...

root@test-laptop:/# pid=6415;
root@test-laptop:/#
root@test-laptop:/# renice -20 -p $pid;
6415: old priority 19, new priority -20
root@test-laptop:/# ps -o "pid pri ni" $pid;
PID PRI  NI
6415  39 -20
root@test-laptop:/# top -n 1 -p $pid;

top - 01:51:40 up  2:21,  2 users,  load average: 0.40, 0.27, 0.27
Tasks:   1 total,   0 running,   1 sleeping,   0 stopped,   0 zombie
Cpu(s): 13.0%us,  2.3%sy,  0.5%ni, 83.4%id,  0.6%wa,  0.1%hi,  0.0%si,  0.0%st
Mem:   2066408k total,  1423656k used,   642752k free,    52852k buffers
Swap:  2000084k total,        0k used,  2000084k free,   821060k cached

PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
6415 test       0 -20  337m 179m  27m S    4  8.9  24:07.43 firefox


或者是
root@test-laptop:/# renice 0 -p $pid;
6415: old priority -20, new priority 0
root@test-laptop:/# ps -o "pid pri ni" $pid;
PID PRI  NI
6415  19   0
root@test-laptop:/# top -n 1 -p $pid;

top - 01:51:46 up  2:21,  2 users,  load average: 0.36, 0.26, 0.27
Tasks:   1 total,   0 running,   1 sleeping,   0 stopped,   0 zombie
Cpu(s): 13.0%us,  2.3%sy,  0.5%ni, 83.4%id,  0.6%wa,  0.1%hi,  0.0%si,  0.0%st
Mem:   2066408k total,  1423716k used,   642692k free,    52860k buffers
Swap:  2000084k total,        0k used,  2000084k free,   821060k cached

PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
6415 test      20   0  337m 179m  27m S   10  8.9  24:07.82 firefox

static priority ranging from 100 to 139 (from ULK)

真要說的話，至少top的結果是"正常"的，ps的根本反過來了....
這是bug...還是有什麼道理的呢??


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