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3137. [func] Improve hardware scalability by allowing multiple

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worker threads to process incoming UDP packets.
			This can significantly increase query throughput
			on some systems.  [RT #22992]
This commit is contained in:
Evan Hunt
2011-07-28 04:04:37 +00:00
parent 8181aa6228
commit f07b2fccaf
17 changed files with 738 additions and 223 deletions
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111
bin/named/client.c
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@@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: client.c,v 1.273 2011/05/05 23:44:52 marka Exp $ */
/* $Id: client.c,v 1.274 2011/07/28 04:04:36 each Exp $ */
#include <config.h>
@@ -2530,8 +2530,10 @@ ns_clientmgr_createclients(ns_clientmgr_t *manager, unsigned int n,
ns_interface_t *ifp, isc_boolean_t tcp)
{
isc_result_t result = ISC_R_SUCCESS;
isc_boolean_t success = ISC_FALSE;
unsigned int i;
ns_client_t *client;
unsigned int disp;
REQUIRE(VALID_MANAGER(manager));
REQUIRE(n > 0);
@@ -2546,61 +2548,68 @@ ns_clientmgr_createclients(ns_clientmgr_t *manager, unsigned int n,
LOCK(&manager->lock);
for (i = 0; i < n; i++) {
isc_event_t *ev;
/*
* Allocate a client. First try to get a recycled one;
* if that fails, make a new one.
*/
client = NULL;
if (!ns_g_clienttest)
client = ISC_LIST_HEAD(manager->inactive);
if (client != NULL) {
MTRACE("recycle");
ISC_LIST_UNLINK(manager->inactive, client, link);
client->list = NULL;
} else {
MTRACE("create new");
result = client_create(manager, &client);
if (result != ISC_R_SUCCESS)
break;
for (disp = 0; disp < n; disp++) {
for (i = 0; i < n; i++) {
isc_event_t *ev;
/*
* Allocate a client. First try to get a recycled one;
* if that fails, make a new one.
*/
client = NULL;
if (!ns_g_clienttest)
client = ISC_LIST_HEAD(manager->inactive);
if (client != NULL) {
MTRACE("recycle");
ISC_LIST_UNLINK(manager->inactive, client,
link);
client->list = NULL;
} else {
MTRACE("create new");
result = client_create(manager, &client);
if (result != ISC_R_SUCCESS)
break;
}
ns_interface_attach(ifp, &client->interface);
client->state = NS_CLIENTSTATE_READY;
INSIST(client->recursionquota == NULL);
if (tcp) {
client->attributes |= NS_CLIENTATTR_TCP;
isc_socket_attach(ifp->tcpsocket,
&client->tcplistener);
} else {
isc_socket_t *sock;
dns_dispatch_attach(ifp->udpdispatch[disp],
&client->dispatch);
sock = dns_dispatch_getsocket(client->dispatch);
isc_socket_attach(sock, &client->udpsocket);
}
client->manager = manager;
ISC_LIST_APPEND(manager->active, client, link);
client->list = &manager->active;
INSIST(client->nctls == 0);
client->nctls++;
ev = &client->ctlevent;
isc_task_send(client->task, &ev);
success = ISC_TRUE;
}
ns_interface_attach(ifp, &client->interface);
client->state = NS_CLIENTSTATE_READY;
INSIST(client->recursionquota == NULL);
if (tcp) {
client->attributes |= NS_CLIENTATTR_TCP;
isc_socket_attach(ifp->tcpsocket,
&client->tcplistener);
} else {
isc_socket_t *sock;
dns_dispatch_attach(ifp->udpdispatch,
&client->dispatch);
sock = dns_dispatch_getsocket(client->dispatch);
isc_socket_attach(sock, &client->udpsocket);
}
client->manager = manager;
ISC_LIST_APPEND(manager->active, client, link);
client->list = &manager->active;
INSIST(client->nctls == 0);
client->nctls++;
ev = &client->ctlevent;
isc_task_send(client->task, &ev);
}
if (i != 0) {
/*
* We managed to create at least one client, so we
* declare victory.
*/
result = ISC_R_SUCCESS;
}
UNLOCK(&manager->lock);
/*
* If managed to create at least one client for
* one dispatch, we declare victory.
*/
if (success)
return (ISC_R_SUCCESS);
return (result);
}