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Code Issues Releases Activity

Comment some of the 'io' functions.

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This commit is contained in:
Alfred Perlstein 2004-08-01 09:19:41 +00:00
parent 4084e6aad2
commit dcd6f4bd48
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=132955
1 changed files with 29 additions and 0 deletions
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29
usr.bin/top/machine.c
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@ -415,17 +415,39 @@ get_system_info(struct system_info *si)
#define NOPROC ((void *)-1)
/*
* We need to compare data from the old process entry with the new
* process entry.
* To facilitate doing this quickly we stash a pointer in the kinfo_proc
* structure to cache the mapping. We also use a negative cache pointer
* of NOPROC to avoid duplicate lookups.
* XXX: this could be done when the actual processes are fetched, we do
* it here out of laziness.
*/
const struct kinfo_proc *
get_old_proc(struct kinfo_proc *pp)
{
struct kinfo_proc **oldpp, *oldp;
/*
* If this is the first fetch of the kinfo_procs then we don't have
* any previous entries.
*/
if (previous_proc_count == 0)
return (NULL);
/* negative cache? */
if (pp->ki_udata == NOPROC)
return (NULL);
/* cached? */
if (pp->ki_udata != NULL)
return (pp->ki_udata);
/*
* Not cached,
* 1) look up based on pid.
* 2) compare process start.
* If we fail here, then setup a negative cache entry, otherwise
* cache it.
*/
oldpp = bsearch(&pp, previous_pref, previous_proc_count,
sizeof(*previous_pref), compare_pid);
if (oldpp == NULL) {
@ -441,6 +463,10 @@ get_old_proc(struct kinfo_proc *pp)
return (oldp);
}
/*
* Return the total amount of IO done in blocks in/out and faults.
* store the values individually in the pointers passed in.
*/
long
get_io_stats(struct kinfo_proc *pp, long *inp, long *oup, long *flp)
{
@ -464,6 +490,9 @@ get_io_stats(struct kinfo_proc *pp, long *inp, long *oup, long *flp)
return (ret);
}
/*
* Return the total number of block in/out and faults by a process.
*/
long
get_io_total(struct kinfo_proc *pp)
{