Remove several linear list traversals per request from RPC server code.
Do not insert active ports into pool->sp_active list if they are success- fully assigned to some thread. This makes that list include only ports that really require attention, and so traversal can be reduced to simple taking the first one. Remove idle thread from pool->sp_idlethreads list when assigning some work (port of requests) to it. That again makes possible to replace list traversals with simple taking the first element.
This commit is contained in:
parent
c63e7b9304
commit
ba981145d6
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=259659
@ -289,19 +289,6 @@ fha_hash_entry_add_op(struct fha_hash_entry *fhe, int locktype, int count)
|
|||||||
fhe->num_rw += count;
|
fhe->num_rw += count;
|
||||||
}
|
}
|
||||||
|
|
||||||
static SVCTHREAD *
|
|
||||||
get_idle_thread(SVCPOOL *pool)
|
|
||||||
{
|
|
||||||
SVCTHREAD *st;
|
|
||||||
|
|
||||||
LIST_FOREACH(st, &pool->sp_idlethreads, st_ilink) {
|
|
||||||
if (st->st_xprt == NULL && STAILQ_EMPTY(&st->st_reqs))
|
|
||||||
return (st);
|
|
||||||
}
|
|
||||||
return (NULL);
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Get the service thread currently associated with the fhe that is
|
* Get the service thread currently associated with the fhe that is
|
||||||
* appropriate to handle this operation.
|
* appropriate to handle this operation.
|
||||||
@ -386,7 +373,7 @@ fha_hash_entry_choose_thread(struct fha_params *softc,
|
|||||||
ITRACE_CURPROC(ITRACE_NFS, ITRACE_INFO,
|
ITRACE_CURPROC(ITRACE_NFS, ITRACE_INFO,
|
||||||
"fha: %p(%d)t", thread, thread->st_reqcount);
|
"fha: %p(%d)t", thread, thread->st_reqcount);
|
||||||
#endif
|
#endif
|
||||||
} else if ((thread = get_idle_thread(pool))) {
|
} else if ((thread = LIST_FIRST(&pool->sp_idlethreads))) {
|
||||||
#if 0
|
#if 0
|
||||||
ITRACE_CURPROC(ITRACE_NFS, ITRACE_INFO,
|
ITRACE_CURPROC(ITRACE_NFS, ITRACE_INFO,
|
||||||
"fha: %p(%d)i", thread, thread->st_reqcount);
|
"fha: %p(%d)i", thread, thread->st_reqcount);
|
||||||
@ -418,7 +405,6 @@ SVCTHREAD *
|
|||||||
fha_assign(SVCTHREAD *this_thread, struct svc_req *req,
|
fha_assign(SVCTHREAD *this_thread, struct svc_req *req,
|
||||||
struct fha_params *softc)
|
struct fha_params *softc)
|
||||||
{
|
{
|
||||||
SVCPOOL *pool;
|
|
||||||
SVCTHREAD *thread;
|
SVCTHREAD *thread;
|
||||||
struct fha_info i;
|
struct fha_info i;
|
||||||
struct fha_hash_entry *fhe;
|
struct fha_hash_entry *fhe;
|
||||||
@ -439,7 +425,6 @@ fha_assign(SVCTHREAD *this_thread, struct svc_req *req,
|
|||||||
if (req->rq_vers != 2 && req->rq_vers != 3)
|
if (req->rq_vers != 2 && req->rq_vers != 3)
|
||||||
return (this_thread);
|
return (this_thread);
|
||||||
|
|
||||||
pool = req->rq_xprt->xp_pool;
|
|
||||||
fha_extract_info(req, &i, cb);
|
fha_extract_info(req, &i, cb);
|
||||||
|
|
||||||
/*
|
/*
|
||||||
|
@ -293,12 +293,10 @@ xprt_unregister_locked(SVCXPRT *xprt)
|
|||||||
{
|
{
|
||||||
SVCPOOL *pool = xprt->xp_pool;
|
SVCPOOL *pool = xprt->xp_pool;
|
||||||
|
|
||||||
|
mtx_assert(&xprt->xp_mlock, MA_OWNED);
|
||||||
KASSERT(xprt->xp_registered == TRUE,
|
KASSERT(xprt->xp_registered == TRUE,
|
||||||
("xprt_unregister_locked: not registered"));
|
("xprt_unregister_locked: not registered"));
|
||||||
if (xprt->xp_active) {
|
xprt_inactive_locked(xprt);
|
||||||
TAILQ_REMOVE(&pool->sp_active, xprt, xp_alink);
|
|
||||||
xprt->xp_active = FALSE;
|
|
||||||
}
|
|
||||||
TAILQ_REMOVE(&pool->sp_xlist, xprt, xp_link);
|
TAILQ_REMOVE(&pool->sp_xlist, xprt, xp_link);
|
||||||
xprt->xp_registered = FALSE;
|
xprt->xp_registered = FALSE;
|
||||||
}
|
}
|
||||||
@ -320,25 +318,25 @@ xprt_unregister(SVCXPRT *xprt)
|
|||||||
SVC_RELEASE(xprt);
|
SVC_RELEASE(xprt);
|
||||||
}
|
}
|
||||||
|
|
||||||
static void
|
/*
|
||||||
|
* Attempt to assign a service thread to this transport.
|
||||||
|
*/
|
||||||
|
static int
|
||||||
xprt_assignthread(SVCXPRT *xprt)
|
xprt_assignthread(SVCXPRT *xprt)
|
||||||
{
|
{
|
||||||
SVCPOOL *pool = xprt->xp_pool;
|
SVCPOOL *pool = xprt->xp_pool;
|
||||||
SVCTHREAD *st;
|
SVCTHREAD *st;
|
||||||
|
|
||||||
/*
|
mtx_assert(&xprt->xp_mlock, MA_OWNED);
|
||||||
* Attempt to assign a service thread to this
|
st = LIST_FIRST(&pool->sp_idlethreads);
|
||||||
* transport.
|
|
||||||
*/
|
|
||||||
LIST_FOREACH(st, &pool->sp_idlethreads, st_ilink) {
|
|
||||||
if (st->st_xprt == NULL && STAILQ_EMPTY(&st->st_reqs))
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
if (st) {
|
if (st) {
|
||||||
|
LIST_REMOVE(st, st_ilink);
|
||||||
|
st->st_idle = FALSE;
|
||||||
SVC_ACQUIRE(xprt);
|
SVC_ACQUIRE(xprt);
|
||||||
xprt->xp_thread = st;
|
xprt->xp_thread = st;
|
||||||
st->st_xprt = xprt;
|
st->st_xprt = xprt;
|
||||||
cv_signal(&st->st_cond);
|
cv_signal(&st->st_cond);
|
||||||
|
return (TRUE);
|
||||||
} else {
|
} else {
|
||||||
/*
|
/*
|
||||||
* See if we can create a new thread. The
|
* See if we can create a new thread. The
|
||||||
@ -354,6 +352,7 @@ xprt_assignthread(SVCXPRT *xprt)
|
|||||||
pool->sp_state = SVCPOOL_THREADWANTED;
|
pool->sp_state = SVCPOOL_THREADWANTED;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
return (FALSE);
|
||||||
}
|
}
|
||||||
|
|
||||||
void
|
void
|
||||||
@ -372,9 +371,12 @@ xprt_active(SVCXPRT *xprt)
|
|||||||
}
|
}
|
||||||
|
|
||||||
if (!xprt->xp_active) {
|
if (!xprt->xp_active) {
|
||||||
TAILQ_INSERT_TAIL(&pool->sp_active, xprt, xp_alink);
|
|
||||||
xprt->xp_active = TRUE;
|
xprt->xp_active = TRUE;
|
||||||
xprt_assignthread(xprt);
|
if (xprt->xp_thread == NULL) {
|
||||||
|
if (!xprt_assignthread(xprt))
|
||||||
|
TAILQ_INSERT_TAIL(&pool->sp_active, xprt,
|
||||||
|
xp_alink);
|
||||||
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
mtx_unlock(&pool->sp_lock);
|
mtx_unlock(&pool->sp_lock);
|
||||||
@ -385,8 +387,10 @@ xprt_inactive_locked(SVCXPRT *xprt)
|
|||||||
{
|
{
|
||||||
SVCPOOL *pool = xprt->xp_pool;
|
SVCPOOL *pool = xprt->xp_pool;
|
||||||
|
|
||||||
|
mtx_assert(&xprt->xp_mlock, MA_OWNED);
|
||||||
if (xprt->xp_active) {
|
if (xprt->xp_active) {
|
||||||
TAILQ_REMOVE(&pool->sp_active, xprt, xp_alink);
|
if (xprt->xp_thread == NULL)
|
||||||
|
TAILQ_REMOVE(&pool->sp_active, xprt, xp_alink);
|
||||||
xprt->xp_active = FALSE;
|
xprt->xp_active = FALSE;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
@ -948,10 +952,11 @@ svc_assign_waiting_sockets(SVCPOOL *pool)
|
|||||||
{
|
{
|
||||||
SVCXPRT *xprt;
|
SVCXPRT *xprt;
|
||||||
|
|
||||||
TAILQ_FOREACH(xprt, &pool->sp_active, xp_alink) {
|
while ((xprt = TAILQ_FIRST(&pool->sp_active)) != NULL) {
|
||||||
if (!xprt->xp_thread) {
|
if (xprt_assignthread(xprt))
|
||||||
xprt_assignthread(xprt);
|
TAILQ_REMOVE(&pool->sp_active, xprt, xp_alink);
|
||||||
}
|
else
|
||||||
|
break;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
@ -1042,21 +1047,17 @@ svc_run_internal(SVCPOOL *pool, bool_t ismaster)
|
|||||||
* active transport which isn't being serviced
|
* active transport which isn't being serviced
|
||||||
* by a thread.
|
* by a thread.
|
||||||
*/
|
*/
|
||||||
if (svc_request_space_available(pool)) {
|
if (svc_request_space_available(pool) &&
|
||||||
TAILQ_FOREACH(xprt, &pool->sp_active,
|
(xprt = TAILQ_FIRST(&pool->sp_active)) != NULL) {
|
||||||
xp_alink) {
|
TAILQ_REMOVE(&pool->sp_active, xprt, xp_alink);
|
||||||
if (!xprt->xp_thread) {
|
SVC_ACQUIRE(xprt);
|
||||||
SVC_ACQUIRE(xprt);
|
xprt->xp_thread = st;
|
||||||
xprt->xp_thread = st;
|
st->st_xprt = xprt;
|
||||||
st->st_xprt = xprt;
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
if (st->st_xprt)
|
|
||||||
continue;
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
LIST_INSERT_HEAD(&pool->sp_idlethreads, st, st_ilink);
|
LIST_INSERT_HEAD(&pool->sp_idlethreads, st, st_ilink);
|
||||||
|
st->st_idle = TRUE;
|
||||||
if (ismaster || (!ismaster &&
|
if (ismaster || (!ismaster &&
|
||||||
pool->sp_threadcount > pool->sp_minthreads))
|
pool->sp_threadcount > pool->sp_minthreads))
|
||||||
error = cv_timedwait_sig(&st->st_cond,
|
error = cv_timedwait_sig(&st->st_cond,
|
||||||
@ -1064,7 +1065,10 @@ svc_run_internal(SVCPOOL *pool, bool_t ismaster)
|
|||||||
else
|
else
|
||||||
error = cv_wait_sig(&st->st_cond,
|
error = cv_wait_sig(&st->st_cond,
|
||||||
&pool->sp_lock);
|
&pool->sp_lock);
|
||||||
LIST_REMOVE(st, st_ilink);
|
if (st->st_idle) {
|
||||||
|
LIST_REMOVE(st, st_ilink);
|
||||||
|
st->st_idle = FALSE;
|
||||||
|
}
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Reduce worker thread count when idle.
|
* Reduce worker thread count when idle.
|
||||||
@ -1132,11 +1136,12 @@ svc_run_internal(SVCPOOL *pool, bool_t ismaster)
|
|||||||
* execute the request
|
* execute the request
|
||||||
* immediately.
|
* immediately.
|
||||||
*/
|
*/
|
||||||
if (stpref != st) {
|
if (stpref == st)
|
||||||
cv_signal(&stpref->st_cond);
|
|
||||||
continue;
|
|
||||||
} else {
|
|
||||||
break;
|
break;
|
||||||
|
if (stpref->st_idle) {
|
||||||
|
LIST_REMOVE(stpref, st_ilink);
|
||||||
|
stpref->st_idle = FALSE;
|
||||||
|
cv_signal(&stpref->st_cond);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
} while (stat == XPRT_MOREREQS
|
} while (stat == XPRT_MOREREQS
|
||||||
@ -1153,10 +1158,9 @@ svc_run_internal(SVCPOOL *pool, bool_t ismaster)
|
|||||||
xprt->xp_thread = NULL;
|
xprt->xp_thread = NULL;
|
||||||
st->st_xprt = NULL;
|
st->st_xprt = NULL;
|
||||||
if (xprt->xp_active) {
|
if (xprt->xp_active) {
|
||||||
xprt_assignthread(xprt);
|
if (!xprt_assignthread(xprt))
|
||||||
TAILQ_REMOVE(&pool->sp_active, xprt, xp_alink);
|
TAILQ_INSERT_TAIL(&pool->sp_active,
|
||||||
TAILQ_INSERT_TAIL(&pool->sp_active, xprt,
|
xprt, xp_alink);
|
||||||
xp_alink);
|
|
||||||
}
|
}
|
||||||
mtx_unlock(&pool->sp_lock);
|
mtx_unlock(&pool->sp_lock);
|
||||||
SVC_RELEASE(xprt);
|
SVC_RELEASE(xprt);
|
||||||
|
@ -278,6 +278,7 @@ typedef struct __rpc_svcthread {
|
|||||||
SVCXPRT *st_xprt; /* transport we are processing */
|
SVCXPRT *st_xprt; /* transport we are processing */
|
||||||
struct svc_reqlist st_reqs; /* RPC requests to execute */
|
struct svc_reqlist st_reqs; /* RPC requests to execute */
|
||||||
int st_reqcount; /* number of queued reqs */
|
int st_reqcount; /* number of queued reqs */
|
||||||
|
int st_idle; /* thread is on idle list */
|
||||||
struct cv st_cond; /* sleeping for work */
|
struct cv st_cond; /* sleeping for work */
|
||||||
LIST_ENTRY(__rpc_svcthread) st_link; /* all threads list */
|
LIST_ENTRY(__rpc_svcthread) st_link; /* all threads list */
|
||||||
LIST_ENTRY(__rpc_svcthread) st_ilink; /* idle threads list */
|
LIST_ENTRY(__rpc_svcthread) st_ilink; /* idle threads list */
|
||||||
|
Loading…
Reference in New Issue
Block a user