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Add locking notes on the members of rusage. Note that these notes reflect

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what is already present in the tree and apply to the rusage struct for
current process usage rather than child process usage.
This commit is contained in:
John Baldwin 2004-09-23 21:08:14 +00:00
parent e6c8092ba0
commit 058cab4b41
1 changed files with 21 additions and 16 deletions
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37
sys/sys/resource.h
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@ -49,29 +49,34 @@
/* /*
* Resource utilization information. * Resource utilization information.
*
* Locking key:
* c - locked by proc mtx
* j - locked by sched_lock mtx
* n - not locked, lazy
*/ */
#define RUSAGE_SELF 0 #define RUSAGE_SELF 0
#define RUSAGE_CHILDREN -1 #define RUSAGE_CHILDREN -1
struct rusage { struct rusage {
struct timeval ru_utime; /* user time used */ struct timeval ru_utime; /* (n) user time used */
struct timeval ru_stime; /* system time used */ struct timeval ru_stime; /* (n) system time used */
long ru_maxrss; /* max resident set size */ long ru_maxrss; /* (j) max resident set size */
#define ru_first ru_ixrss #define ru_first ru_ixrss
long ru_ixrss; /* integral shared memory size */ long ru_ixrss; /* (j) integral shared memory size */
long ru_idrss; /* integral unshared data " */ long ru_idrss; /* (j) integral unshared data " */
long ru_isrss; /* integral unshared stack " */ long ru_isrss; /* (j) integral unshared stack " */
long ru_minflt; /* page reclaims */ long ru_minflt; /* (c) page reclaims */
long ru_majflt; /* page faults */ long ru_majflt; /* (c) page faults */
long ru_nswap; /* swaps */ long ru_nswap; /* (c + j) swaps */
long ru_inblock; /* block input operations */ long ru_inblock; /* (n) block input operations */
long ru_oublock; /* block output operations */ long ru_oublock; /* (n) block output operations */
long ru_msgsnd; /* messages sent */ long ru_msgsnd; /* (n) messages sent */
long ru_msgrcv; /* messages received */ long ru_msgrcv; /* (n) messages received */
long ru_nsignals; /* signals received */ long ru_nsignals; /* (c) signals received */
long ru_nvcsw; /* voluntary context switches */ long ru_nvcsw; /* (j) voluntary context switches */
long ru_nivcsw; /* involuntary " */ long ru_nivcsw; /* (j) involuntary " */
#define ru_last ru_nivcsw #define ru_last ru_nivcsw
}; };