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Code Issues Releases Activity

Track current and peak sfbuf usage, export the values via sysctl.

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This commit is contained in:
Mike Silbersack 2003-12-27 07:52:47 +00:00
parent 30b48d7f6d
commit 5eda9873e9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=123884
8 changed files with 38 additions and 0 deletions
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4
sys/alpha/alpha/vm_machdep.c
View File

@ -116,6 +116,7 @@ static struct {
} sf_freelist;
static u_int sf_buf_alloc_want;
extern int nsfbufspeak, nsfbufsused;
/*
* Finish a fork operation, with process p2 nearly set up.
@ -428,6 +429,8 @@ sf_buf_alloc(struct vm_page *m)
if (sf != NULL) {
SLIST_REMOVE_HEAD(&sf_freelist.sf_head, free_list);
sf->m = m;
nsfbufsused++;
nsfbufspeak = max(nsfbufspeak, nsfbufsused);
}
mtx_unlock(&sf_freelist.sf_lock);
return (sf);
@ -457,6 +460,7 @@ sf_buf_free(void *addr, void *args)
sf->m = NULL;
mtx_lock(&sf_freelist.sf_lock);
SLIST_INSERT_HEAD(&sf_freelist.sf_head, sf, free_list);
nsfbufsused--;
if (sf_buf_alloc_want > 0)
wakeup_one(&sf_freelist);
mtx_unlock(&sf_freelist.sf_lock);

4
sys/amd64/amd64/vm_machdep.c
View File

@ -99,6 +99,7 @@ static struct {
} sf_freelist;
static u_int sf_buf_alloc_want;
extern int nsfbufspeak, nsfbufsused;
/*
* Finish a fork operation, with process p2 nearly set up.
@ -473,6 +474,8 @@ sf_buf_alloc(struct vm_page *m)
if (sf != NULL) {
SLIST_REMOVE_HEAD(&sf_freelist.sf_head, free_list);
sf->m = m;
nsfbufsused++;
nsfbufspeak = max(nsfbufspeak, nsfbufsused);
}
mtx_unlock(&sf_freelist.sf_lock);
return (sf);
@ -502,6 +505,7 @@ sf_buf_free(void *addr, void *args)
sf->m = NULL;
mtx_lock(&sf_freelist.sf_lock);
SLIST_INSERT_HEAD(&sf_freelist.sf_head, sf, free_list);
nsfbufsused--;
if (sf_buf_alloc_want > 0)
wakeup_one(&sf_freelist);
mtx_unlock(&sf_freelist.sf_lock);

8
sys/i386/i386/vm_machdep.c
View File

@ -112,6 +112,7 @@ static u_long sf_buf_hashmask;
static TAILQ_HEAD(, sf_buf) sf_buf_freelist;
static u_int sf_buf_alloc_want;
extern int nsfbufspeak, nsfbufsused;
/*
* A lock used to synchronize access to the hash table and free list
@ -612,6 +613,10 @@ sf_buf_alloc(struct vm_page *m)
if (sf->ref_count == 0)
TAILQ_REMOVE(&sf_buf_freelist, sf, free_entry);
sf->ref_count++;
if (sf->ref_count == 1) {
nsfbufsused++;
nsfbufspeak = max(nsfbufspeak, nsfbufsused);
}
goto done;
}
}
@ -633,6 +638,8 @@ sf_buf_alloc(struct vm_page *m)
LIST_INSERT_HEAD(hash_list, sf, list_entry);
sf->ref_count = 1;
sf->m = m;
nsfbufsused++;
nsfbufspeak = max(nsfbufspeak, nsfbufsused);
pmap_qenter(sf->kva, &sf->m, 1);
done:
mtx_unlock(&sf_buf_lock);
@ -653,6 +660,7 @@ sf_buf_free(void *addr, void *args)
m = sf->m;
sf->ref_count--;
if (sf->ref_count == 0) {
nsfbufsused--;
TAILQ_INSERT_TAIL(&sf_buf_freelist, sf, free_entry);
if (sf_buf_alloc_want > 0)
wakeup_one(&sf_buf_freelist);

4
sys/ia64/ia64/vm_machdep.c
View File

@ -113,6 +113,7 @@ static struct {
} sf_freelist;
static u_int sf_buf_alloc_want;
extern int nsfbufspeak, nsfbufsused;
void
cpu_thread_exit(struct thread *td)
@ -365,6 +366,8 @@ sf_buf_alloc(struct vm_page *m)
if (sf != NULL) {
SLIST_REMOVE_HEAD(&sf_freelist.sf_head, free_list);
sf->m = m;
nsfbufsused++;
nsfbufspeak = max(nsfbufspeak, nsfbufsused);
}
mtx_unlock(&sf_freelist.sf_lock);
return (sf);
@ -394,6 +397,7 @@ sf_buf_free(void *addr, void *args)
sf->m = NULL;
mtx_lock(&sf_freelist.sf_lock);
SLIST_INSERT_HEAD(&sf_freelist.sf_head, sf, free_list);
nsfbufsused--;
if (sf_buf_alloc_want > 0)
wakeup_one(&sf_freelist);
mtx_unlock(&sf_freelist.sf_lock);

6
sys/kern/subr_mbuf.c
View File

@ -173,6 +173,8 @@ int nmbufs;
int nmbclusters;
int nmbcnt;
int nsfbufs;
int nsfbufspeak;
int nsfbufsused;
/*
* Sizes of objects per bucket. There are this size's worth of mbufs
@ -318,6 +320,10 @@ SYSCTL_INT(_kern_ipc, OID_AUTO, nmbcnt, CTLFLAG_RDTUN, &nmbcnt, 0,
"Number used to scale kmem_map to ensure sufficient space for counters");
SYSCTL_INT(_kern_ipc, OID_AUTO, nsfbufs, CTLFLAG_RDTUN, &nsfbufs, 0,
"Maximum number of sendfile(2) sf_bufs available");
SYSCTL_INT(_kern_ipc, OID_AUTO, nsfbufspeak, CTLFLAG_RD, &nsfbufspeak, 0,
"Number of sendfile(2) sf_bufs at peak usage");
SYSCTL_INT(_kern_ipc, OID_AUTO, nsfbufsused, CTLFLAG_RD, &nsfbufsused, 0,
"Number of sendfile(2) sf_bufs in use");
SYSCTL_INT(_kern_ipc, OID_AUTO, mbuf_wait, CTLFLAG_RW, &mbuf_wait, 0,
"Sleep time of mbuf subsystem wait allocations during exhaustion");
SYSCTL_UINT(_kern_ipc, OID_AUTO, mbuf_hiwm, CTLFLAG_RW, &mbuf_hiwm, 0,

4
sys/powerpc/aim/vm_machdep.c
View File

@ -116,6 +116,7 @@ static struct {
} sf_freelist;
static u_int sf_buf_alloc_want;
extern int nsfbufspeak, nsfbufsused;
/*
* Finish a fork operation, with process p2 nearly set up.
@ -282,6 +283,8 @@ sf_buf_alloc(struct vm_page *m)
if (sf != NULL) {
SLIST_REMOVE_HEAD(&sf_freelist.sf_head, free_list);
sf->m = m;
nsfbufsused++;
nsfbufspeak = max(nsfbufspeak, nsfbufsused);
pmap_qenter(sf->kva, &sf->m, 1);
}
mtx_unlock(&sf_freelist.sf_lock);
@ -313,6 +316,7 @@ sf_buf_free(void *addr, void *args)
sf->m = NULL;
mtx_lock(&sf_freelist.sf_lock);
SLIST_INSERT_HEAD(&sf_freelist.sf_head, sf, free_list);
nsfbufsused--;
if (sf_buf_alloc_want > 0)
wakeup_one(&sf_freelist);
mtx_unlock(&sf_freelist.sf_lock);

4
sys/powerpc/powerpc/vm_machdep.c
View File

@ -116,6 +116,7 @@ static struct {
} sf_freelist;
static u_int sf_buf_alloc_want;
extern int nsfbufspeak, nsfbufsused;
/*
* Finish a fork operation, with process p2 nearly set up.
@ -282,6 +283,8 @@ sf_buf_alloc(struct vm_page *m)
if (sf != NULL) {
SLIST_REMOVE_HEAD(&sf_freelist.sf_head, free_list);
sf->m = m;
nsfbufsused++;
nsfbufspeak = max(nsfbufspeak, nsfbufsused);
pmap_qenter(sf->kva, &sf->m, 1);
}
mtx_unlock(&sf_freelist.sf_lock);
@ -313,6 +316,7 @@ sf_buf_free(void *addr, void *args)
sf->m = NULL;
mtx_lock(&sf_freelist.sf_lock);
SLIST_INSERT_HEAD(&sf_freelist.sf_head, sf, free_list);
nsfbufsused--;
if (sf_buf_alloc_want > 0)
wakeup_one(&sf_freelist);
mtx_unlock(&sf_freelist.sf_lock);

4
sys/sparc64/sparc64/vm_machdep.c
View File

@ -100,6 +100,7 @@ static struct {
} sf_freelist;
static u_int sf_buf_alloc_want;
extern int nsfbufspeak, nsfbufsused;
PMAP_STATS_VAR(uma_nsmall_alloc);
PMAP_STATS_VAR(uma_nsmall_alloc_oc);
@ -409,6 +410,8 @@ sf_buf_alloc(struct vm_page *m)
if (sf != NULL) {
SLIST_REMOVE_HEAD(&sf_freelist.sf_head, free_list);
sf->m = m;
nsfbufsused++;
nsfbufspeak = max(nsfbufspeak, nsfbufsused);
pmap_qenter(sf->kva, &sf->m, 1);
}
mtx_unlock(&sf_freelist.sf_lock);
@ -440,6 +443,7 @@ sf_buf_free(void *addr, void *args)
sf->m = NULL;
mtx_lock(&sf_freelist.sf_lock);
SLIST_INSERT_HEAD(&sf_freelist.sf_head, sf, free_list);
nsfbufsused--;
if (sf_buf_alloc_want > 0)
wakeup_one(&sf_freelist);
mtx_unlock(&sf_freelist.sf_lock);