Linux (2.6.30) 中的 getrusage 是否已损坏 [英] Is getrusage broken in Linux (2.6.30)
本文介绍了Linux (2.6.30) 中的 getrusage 是否已损坏的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
此代码
void print_usage(char * msg)
{
struct rusage usage;
getrusage(RUSAGE_SELF, &usage);
printf("Limits: %s
", msg);
printf(" %s, %li
", " maximum resident set size " , usage.ru_maxrss );
printf(" %s, %li
", " integral shared memory size " , usage.ru_ixrss );
printf(" %s, %li
", " integral unshared data size " , usage.ru_idrss );
printf(" %s, %li
", " integral unshared stack size " , usage.ru_isrss );
printf(" %s, %li
", " page reclaims " , usage.ru_minflt );
printf(" %s, %li
", " page faults " , usage.ru_majflt );
printf(" %s, %li
", " swaps " , usage.ru_nswap );
printf(" %s, %li
", " block input operations " , usage.ru_inblock );
printf(" %s, %li
", " block output operations " , usage.ru_oublock );
printf(" %s, %li
", " messages sent " , usage.ru_msgsnd );
printf(" %s, %li
", " messages received " , usage.ru_msgrcv );
printf(" %s, %li
", " signals received " , usage.ru_nsignals);
printf(" %s, %li
", " voluntary context switches " , usage.ru_nvcsw );
printf(" %s, %li
", " involuntary context switches " , usage.ru_nivcsw );
}
对于许多字段只报告零,即使我在相当大的程序中使用它(在 jvm 启动之后)
reports only zeroes for many fields, even if I use it in rather big program (after jvm start)
maximum resident set size , 0
integral shared memory size , 0
integral unshared data size , 0
integral unshared stack size , 0
page reclaims , 2514
page faults , 0
swaps , 0
block input operations , 0
block output operations , 0
messages sent , 0
messages received , 0
signals received , 0
voluntary context switches , 137
involuntary context switches , 1
非零字段为*vcsw
"、*flt
".
所有*rss
、*swap
、msg*
、*block
、*signals
为零.
有东西坏了吗?
Linux 是 x86 2.6.30.
Linux is x86 2.6.30.
推荐答案
是的,部分损坏了.并非所有字段都由内核填充.http://www.kernel.org/doc/man-pages/online/pages/man2/getrusage.2.html
Yes it is partly broken. Not all fields are filled by kernel. http://www.kernel.org/doc/man-pages/online/pages/man2/getrusage.2.html
工作领域:
ru_utime
ru_stime
ru_maxrss (since Linux 2.6.32)
ru_minflt
ru_majflt
ru_inblock (since Linux 2.6.22)
ru_oublock (since Linux 2.6.22)
ru_nvcsw (since Linux 2.6)
ru_nivcsw (since Linux 2.6)
未使用的字段:
ru_ixrss (unmaintained)
ru_idrss (unmaintained)
ru_isrss (unmaintained)
ru_nswap (unmaintained)
ru_msgsnd (unmaintained)
ru_msgrcv (unmaintained)
ru_nsignals (unmaintained)
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