diff options
author | mav <mav@FreeBSD.org> | 2008-04-15 21:15:32 +0000 |
---|---|---|
committer | mav <mav@FreeBSD.org> | 2008-04-15 21:15:32 +0000 |
commit | 9ed14d3ac1062059f90ad8a3f47c3b7ecf2b4db9 (patch) | |
tree | f4c5e462487e00fa80b6e4128d4d881ce05227af /sys/netgraph | |
parent | 17592597420bddf1004fcfa1a8707155cbe78ab0 (diff) | |
download | FreeBSD-src-9ed14d3ac1062059f90ad8a3f47c3b7ecf2b4db9.zip FreeBSD-src-9ed14d3ac1062059f90ad8a3f47c3b7ecf2b4db9.tar.gz |
Several changes breaking netgraph module ABI collected together:
- reorder structures fields (XX_refs) a bit to group fields modified
same time together. According to my tests it gives up to 10%
SMP performance benefit on real workload due to reduced inter-CPU
cache trashing.
- change q_flags from long to int as long is not really needed there and
it's usage with atomics is argued by some people.
- move NGF_WORKQ flag into the separate field q_flags2 as it protected by
queue mutex instead of node writer protection used by the rest of flags.
- move nd_work queue entry to ng_queue structure to which it is more
related and make it STAILQ instead of TAILQ as now it is a classic FIFO.
- remove q_node pointer from ng_queue structure as it is not really needed.
- reimplement item queue using STAILQ instead of own equal implementation.
As soon as BT subsystem has own item queues using ng_item.el_next update
it also.
- change depth field in ng_item from uintptr_t to u_int. It was made
uintptr_t to keep ABI compatibility.
Reviewed by: julian, emax
Tested with: Netperf cluster
Diffstat (limited to 'sys/netgraph')
-rw-r--r-- | sys/netgraph/bluetooth/include/ng_bluetooth.h | 38 | ||||
-rw-r--r-- | sys/netgraph/netgraph.h | 21 | ||||
-rw-r--r-- | sys/netgraph/ng_base.c | 195 |
3 files changed, 115 insertions, 139 deletions
diff --git a/sys/netgraph/bluetooth/include/ng_bluetooth.h b/sys/netgraph/bluetooth/include/ng_bluetooth.h index c0da3b9..fbfbea7 100644 --- a/sys/netgraph/bluetooth/include/ng_bluetooth.h +++ b/sys/netgraph/bluetooth/include/ng_bluetooth.h @@ -34,6 +34,8 @@ #ifndef _NETGRAPH_BLUETOOTH_H_ #define _NETGRAPH_BLUETOOTH_H_ +#include <sys/queue.h> + /* * Version of the stack */ @@ -147,8 +149,7 @@ typedef struct ng_bt_mbufq * ng_bt_mbufq_p; struct ng_item; struct ng_bt_itemq { - struct ng_item *head; /* first item in the queue */ - struct ng_item *tail; /* last item in the queue */ + STAILQ_HEAD(, ng_item) queue; /* actually items queue */ u_int32_t len; /* number of items in the queue */ u_int32_t maxlen; /* maximal number of items in the queue */ u_int32_t drops; /* number if dropped items */ @@ -156,14 +157,20 @@ struct ng_bt_itemq { typedef struct ng_bt_itemq ng_bt_itemq_t; typedef struct ng_bt_itemq * ng_bt_itemq_p; -#define NG_BT_ITEMQ_INIT(q, _maxlen) NG_BT_MBUFQ_INIT((q), (_maxlen)) +#define NG_BT_ITEMQ_INIT(q, _maxlen) \ + do { \ + STAILQ_INIT(&(q)->queue); \ + (q)->len = 0; \ + (q)->maxlen = (_maxlen); \ + (q)->drops = 0; \ + } while (0) #define NG_BT_ITEMQ_DESTROY(q) \ do { \ NG_BT_ITEMQ_DRAIN((q)); \ } while (0) -#define NG_BT_ITEMQ_FIRST(q) NG_BT_MBUFQ_FIRST((q)) +#define NG_BT_ITEMQ_FIRST(q) STAILQ_FIRST(&(q)->queue) #define NG_BT_ITEMQ_LEN(q) NG_BT_MBUFQ_LEN((q)) @@ -173,37 +180,22 @@ typedef struct ng_bt_itemq * ng_bt_itemq_p; #define NG_BT_ITEMQ_ENQUEUE(q, i) \ do { \ - (i)->el_next = NULL; \ - \ - if ((q)->tail == NULL) \ - (q)->head = (i); \ - else \ - (q)->tail->el_next = (i); \ - \ - (q)->tail = (i); \ + STAILQ_INSERT_TAIL(&(q)->queue, (i), el_next); \ (q)->len ++; \ } while (0) #define NG_BT_ITEMQ_DEQUEUE(q, i) \ do { \ - (i) = (q)->head; \ + (i) = STAILQ_FIRST(&(q)->queue); \ if ((i) != NULL) { \ - (q)->head = (q)->head->el_next; \ - if ((q)->head == NULL) \ - (q)->tail = NULL; \ - \ + STAILQ_REMOVE_HEAD(&(q)->queue, el_next); \ (q)->len --; \ - (i)->el_next = NULL; \ } \ } while (0) #define NG_BT_ITEMQ_PREPEND(q, i) \ do { \ - (i)->el_next = (q)->head; \ - if ((q)->tail == NULL) \ - (q)->tail = (i); \ - \ - (q)->head = (i); \ + STAILQ_INSERT_HEAD(&(q)->queue, (i), el_next); \ (q)->len ++; \ } while (0) diff --git a/sys/netgraph/netgraph.h b/sys/netgraph/netgraph.h index e0b53d1..e327920 100644 --- a/sys/netgraph/netgraph.h +++ b/sys/netgraph/netgraph.h @@ -66,7 +66,7 @@ * Change it for NETGRAPH_DEBUG version so we cannot mix debug and non debug * modules. */ -#define _NG_ABI_VERSION 11 +#define _NG_ABI_VERSION 12 #ifdef NETGRAPH_DEBUG /*----------------------------------------------*/ #define NG_ABI_VERSION (_NG_ABI_VERSION + 0x10000) #else /* NETGRAPH_DEBUG */ /*----------------------------------------------*/ @@ -107,13 +107,13 @@ struct ng_hook { char hk_name[NG_HOOKSIZ]; /* what this node knows this link as */ void *hk_private; /* node dependant ID for this hook */ int hk_flags; /* info about this hook/link */ - int hk_refs; /* dont actually free this till 0 */ int hk_type; /* tbd: hook data link type */ struct ng_hook *hk_peer; /* the other end of this link */ struct ng_node *hk_node; /* The node this hook is attached to */ LIST_ENTRY(ng_hook) hk_hooks; /* linked list of all hooks on node */ ng_rcvmsg_t *hk_rcvmsg; /* control messages come here */ ng_rcvdata_t *hk_rcvdata; /* data comes here */ + int hk_refs; /* dont actually free this till 0 */ #ifdef NETGRAPH_DEBUG /*----------------------------------------------*/ #define HK_MAGIC 0x78573011 int hk_magic; @@ -331,26 +331,25 @@ _ng_hook_hi_stack(hook_p hook, char * file, int line) * embedded in the node structure */ struct ng_queue { - u_long q_flags; + u_int q_flags; /* Current r/w/q lock flags */ + u_int q_flags2; /* Other queue flags */ struct mtx q_mtx; - item_p queue; - item_p *last; - struct ng_node *q_node; /* find the front of the node.. */ + STAILQ_ENTRY(ng_node) q_work; /* nodes with work to do */ + STAILQ_HEAD(, ng_item) queue; /* actually items queue */ }; struct ng_node { char nd_name[NG_NODESIZ]; /* optional globally unique name */ struct ng_type *nd_type; /* the installed 'type' */ int nd_flags; /* see below for bit definitions */ - int nd_refs; /* # of references to this node */ int nd_numhooks; /* number of hooks */ void *nd_private; /* node type dependant node ID */ ng_ID_t nd_ID; /* Unique per node */ LIST_HEAD(hooks, ng_hook) nd_hooks; /* linked list of node hooks */ LIST_ENTRY(ng_node) nd_nodes; /* linked list of all nodes */ LIST_ENTRY(ng_node) nd_idnodes; /* ID hash collision list */ - TAILQ_ENTRY(ng_node) nd_work; /* nodes with work to do */ struct ng_queue nd_input_queue; /* input queue for locking */ + int nd_refs; /* # of references to this node */ #ifdef NETGRAPH_DEBUG /*----------------------------------------------*/ #define ND_MAGIC 0x59264837 int nd_magic; @@ -363,8 +362,6 @@ struct ng_node { /* Flags for a node */ #define NGF_INVALID 0x00000001 /* free when refs go to 0 */ #define NG_INVALID NGF_INVALID /* compat for old code */ -#define NGF_WORKQ 0x00000002 /* node is on the work queue */ -#define NG_WORKQ NGF_WORKQ /* compat for old code */ #define NGF_FORCE_WRITER 0x00000004 /* Never multithread this node */ #define NG_FORCE_WRITER NGF_FORCE_WRITER /* compat for old code */ #define NGF_CLOSING 0x00000008 /* ng_rmnode() at work */ @@ -612,7 +609,7 @@ struct ng_apply_info { }; struct ng_item { u_long el_flags; - item_p el_next; + STAILQ_ENTRY(ng_item) el_next; node_p el_dest; /* The node it will be applied against (or NULL) */ hook_p el_hook; /* Entering hook. Optional in Control messages */ union { @@ -635,7 +632,7 @@ struct ng_item { * and its context. */ struct ng_apply_info *apply; - uintptr_t depth; + u_int depth; #ifdef NETGRAPH_DEBUG /*----------------------------------------------*/ char *lastfile; int lastline; diff --git a/sys/netgraph/ng_base.c b/sys/netgraph/ng_base.c index 7830e12..29b3a64 100644 --- a/sys/netgraph/ng_base.c +++ b/sys/netgraph/ng_base.c @@ -113,20 +113,19 @@ struct ng_node ng_deadnode = { "dead", &ng_deadtype, NGF_INVALID, - 1, /* refs */ 0, /* numhooks */ NULL, /* private */ 0, /* ID */ LIST_HEAD_INITIALIZER(ng_deadnode.hooks), {}, /* all_nodes list entry */ {}, /* id hashtable list entry */ - {}, /* workqueue entry */ { 0, + 0, {}, /* should never use! (should hang) */ - NULL, - &ng_deadnode.nd_input_queue.queue, - &ng_deadnode + {}, /* workqueue entry */ + STAILQ_HEAD_INITIALIZER(ng_deadnode.nd_input_queue.queue), }, + 1, /* refs */ #ifdef NETGRAPH_DEBUG ND_MAGIC, __FILE__, @@ -139,13 +138,13 @@ struct ng_hook ng_deadhook = { "dead", NULL, /* private */ HK_INVALID | HK_DEAD, - 1, /* refs always >= 1 */ 0, /* undefined data link type */ &ng_deadhook, /* Peer is self */ &ng_deadnode, /* attached to deadnode */ {}, /* hooks list */ NULL, /* override rcvmsg() */ NULL, /* override rcvdata() */ + 1, /* refs always >= 1 */ #ifdef NETGRAPH_DEBUG HK_MAGIC, __FILE__, @@ -158,7 +157,7 @@ struct ng_hook ng_deadhook = { * END DEAD STRUCTURES */ /* List nodes with unallocated work */ -static TAILQ_HEAD(, ng_node) ng_worklist = TAILQ_HEAD_INITIALIZER(ng_worklist); +static STAILQ_HEAD(, ng_node) ng_worklist = STAILQ_HEAD_INITIALIZER(ng_worklist); static struct mtx ng_worklist_mtx; /* MUST LOCK NODE FIRST */ /* List of installed types */ @@ -205,7 +204,7 @@ static int ngb_mod_event(module_t mod, int event, void *data); static void ng_worklist_add(node_p node); static void ngintr(void); static int ng_apply_item(node_p node, item_p item, int rw); -static void ng_flush_input_queue(struct ng_queue * ngq); +static void ng_flush_input_queue(node_p node); static node_p ng_ID2noderef(ng_ID_t ID); static int ng_con_nodes(item_p item, node_p node, const char *name, node_p node2, const char *name2); @@ -631,10 +630,8 @@ ng_make_node_common(struct ng_type *type, node_p *nodepp) type->refs++; NG_QUEUE_LOCK_INIT(&node->nd_input_queue); - node->nd_input_queue.queue = NULL; - node->nd_input_queue.last = &node->nd_input_queue.queue; + STAILQ_INIT(&node->nd_input_queue.queue); node->nd_input_queue.q_flags = 0; - node->nd_input_queue.q_node = node; /* Initialize hook list for new node */ LIST_INIT(&node->nd_hooks); @@ -723,7 +720,7 @@ ng_rmnode(node_p node, hook_p dummy1, void *dummy2, int dummy3) * Just before the queue was closed, so it should be empty anyway. * Also removes us from worklist if needed. */ - ng_flush_input_queue(&node->nd_input_queue); + ng_flush_input_queue(node); /* Ask the type if it has anything to do in this case */ if (node->nd_type && node->nd_type->shutdown) { @@ -1772,15 +1769,12 @@ ng_path2noderef(node_p here, const char *address, * read-write queue locking inline functions * \***************************************************************/ -static __inline item_p ng_dequeue(struct ng_queue * ngq, int *rw); -static __inline item_p ng_acquire_read(struct ng_queue * ngq, - item_p item); -static __inline item_p ng_acquire_write(struct ng_queue * ngq, - item_p item); -static __inline void ng_leave_read(struct ng_queue * ngq); -static __inline void ng_leave_write(struct ng_queue * ngq); -static __inline void ng_queue_rw(struct ng_queue * ngq, - item_p item, int rw); +static __inline void ng_queue_rw(node_p node, item_p item, int rw); +static __inline item_p ng_dequeue(node_p node, int *rw); +static __inline item_p ng_acquire_read(node_p node, item_p item); +static __inline item_p ng_acquire_write(node_p node, item_p item); +static __inline void ng_leave_read(node_p node); +static __inline void ng_leave_write(node_p node); /* * Definition of the bits fields in the ng_queue flag word. @@ -1836,8 +1830,8 @@ Node queue has such semantics: #define QUEUE_ACTIVE(QP) ((QP)->q_flags & OP_PENDING) /* How to decide what the next queued item is. */ -#define HEAD_IS_READER(QP) NGI_QUEUED_READER((QP)->queue) -#define HEAD_IS_WRITER(QP) NGI_QUEUED_WRITER((QP)->queue) /* notused */ +#define HEAD_IS_READER(QP) NGI_QUEUED_READER(STAILQ_FIRST(&(QP)->queue)) +#define HEAD_IS_WRITER(QP) NGI_QUEUED_WRITER(STAILQ_FIRST(&(QP)->queue)) /* notused */ /* Read the status to decide if the next item on the queue can now run. */ #define QUEUED_READER_CAN_PROCEED(QP) \ @@ -1850,10 +1844,11 @@ Node queue has such semantics: ((HEAD_IS_READER(QP)) ? QUEUED_READER_CAN_PROCEED(QP) : \ QUEUED_WRITER_CAN_PROCEED(QP)) - #define NGQRW_R 0 #define NGQRW_W 1 +#define NGQ2_WORKQ 0x00000001 + /* * Taking into account the current state of the queue and node, possibly take * the next entry off the queue and return it. Return NULL if there was @@ -1862,9 +1857,10 @@ Node queue has such semantics: * on the queue. */ static __inline item_p -ng_dequeue(struct ng_queue *ngq, int *rw) +ng_dequeue(node_p node, int *rw) { item_p item; + struct ng_queue *ngq = &node->nd_input_queue; /* This MUST be called with the mutex held. */ mtx_assert(&ngq->q_mtx, MA_OWNED); @@ -1873,7 +1869,7 @@ ng_dequeue(struct ng_queue *ngq, int *rw) if (!QUEUE_ACTIVE(ngq)) { CTR4(KTR_NET, "%20s: node [%x] (%p) queue empty; " "queue flags 0x%lx", __func__, - ngq->q_node->nd_ID, ngq->q_node, ngq->q_flags); + node->nd_ID, node, ngq->q_flags); return (NULL); } @@ -1889,17 +1885,17 @@ ng_dequeue(struct ng_queue *ngq, int *rw) /* There is writer, reader can't proceed. */ CTR4(KTR_NET, "%20s: node [%x] (%p) queued reader " "can't proceed; queue flags 0x%lx", __func__, - ngq->q_node->nd_ID, ngq->q_node, t); + node->nd_ID, node, t); return (NULL); } - if (atomic_cmpset_acq_long(&ngq->q_flags, t, + if (atomic_cmpset_acq_int(&ngq->q_flags, t, t + READER_INCREMENT)) break; cpu_spinwait(); } /* We have got reader lock for the node. */ *rw = NGQRW_R; - } else if (atomic_cmpset_acq_long(&ngq->q_flags, OP_PENDING, + } else if (atomic_cmpset_acq_int(&ngq->q_flags, OP_PENDING, OP_PENDING + WRITER_ACTIVE)) { /* We have got writer lock for the node. */ *rw = NGQRW_W; @@ -1907,7 +1903,7 @@ ng_dequeue(struct ng_queue *ngq, int *rw) /* There is somebody other, writer can't proceed. */ CTR4(KTR_NET, "%20s: node [%x] (%p) queued writer " "can't proceed; queue flags 0x%lx", __func__, - ngq->q_node->nd_ID, ngq->q_node, ngq->q_flags); + node->nd_ID, node, ngq->q_flags); return (NULL); } @@ -1915,15 +1911,13 @@ ng_dequeue(struct ng_queue *ngq, int *rw) * Now we dequeue the request (whatever it may be) and correct the * pending flags and the next and last pointers. */ - item = ngq->queue; - ngq->queue = item->el_next; - if (ngq->last == &(item->el_next)) { - ngq->last = &(ngq->queue); - atomic_clear_long(&ngq->q_flags, OP_PENDING); - } + item = STAILQ_FIRST(&ngq->queue); + STAILQ_REMOVE_HEAD(&ngq->queue, el_next); + if (STAILQ_EMPTY(&ngq->queue)) + atomic_clear_int(&ngq->q_flags, OP_PENDING); CTR6(KTR_NET, "%20s: node [%x] (%p) returning item %p as %s; " "queue flags 0x%lx", __func__, - ngq->q_node->nd_ID, ngq->q_node, item, *rw ? "WRITER" : "READER" , + node->nd_ID, node, item, *rw ? "WRITER" : "READER" , ngq->q_flags); return (item); } @@ -1933,90 +1927,92 @@ ng_dequeue(struct ng_queue *ngq, int *rw) * If the queue could be run now, add node to the queue handler's worklist. */ static __inline void -ng_queue_rw(struct ng_queue * ngq, item_p item, int rw) +ng_queue_rw(node_p node, item_p item, int rw) { + struct ng_queue *ngq = &node->nd_input_queue; if (rw == NGQRW_W) NGI_SET_WRITER(item); else NGI_SET_READER(item); - item->el_next = NULL; /* maybe not needed */ NG_QUEUE_LOCK(ngq); /* Set OP_PENDING flag and enqueue the item. */ - atomic_set_long(&ngq->q_flags, OP_PENDING); - *ngq->last = item; - ngq->last = &(item->el_next); + atomic_set_int(&ngq->q_flags, OP_PENDING); + STAILQ_INSERT_TAIL(&ngq->queue, item, el_next); CTR5(KTR_NET, "%20s: node [%x] (%p) queued item %p as %s", __func__, - ngq->q_node->nd_ID, ngq->q_node, item, rw ? "WRITER" : "READER" ); + node->nd_ID, node, item, rw ? "WRITER" : "READER" ); /* * We can take the worklist lock with the node locked * BUT NOT THE REVERSE! */ if (NEXT_QUEUED_ITEM_CAN_PROCEED(ngq)) - ng_worklist_add(ngq->q_node); + ng_worklist_add(node); NG_QUEUE_UNLOCK(ngq); } /* Acquire reader lock on node. If node is busy, queue the packet. */ static __inline item_p -ng_acquire_read(struct ng_queue *ngq, item_p item) +ng_acquire_read(node_p node, item_p item) { - KASSERT(ngq != &ng_deadnode.nd_input_queue, + KASSERT(node != &ng_deadnode, ("%s: working on deadnode", __func__)); /* Reader needs node without writer and pending items. */ while (1) { - long t = ngq->q_flags; + long t = node->nd_input_queue.q_flags; if (t & NGQ_RMASK) break; /* Node is not ready for reader. */ - if (atomic_cmpset_acq_long(&ngq->q_flags, t, t + READER_INCREMENT)) { + if (atomic_cmpset_acq_int(&node->nd_input_queue.q_flags, + t, t + READER_INCREMENT)) { /* Successfully grabbed node */ CTR4(KTR_NET, "%20s: node [%x] (%p) acquired item %p", - __func__, ngq->q_node->nd_ID, ngq->q_node, item); + __func__, node->nd_ID, node, item); return (item); } cpu_spinwait(); }; /* Queue the request for later. */ - ng_queue_rw(ngq, item, NGQRW_R); + ng_queue_rw(node, item, NGQRW_R); return (NULL); } /* Acquire writer lock on node. If node is busy, queue the packet. */ static __inline item_p -ng_acquire_write(struct ng_queue *ngq, item_p item) +ng_acquire_write(node_p node, item_p item) { - KASSERT(ngq != &ng_deadnode.nd_input_queue, + KASSERT(node != &ng_deadnode, ("%s: working on deadnode", __func__)); /* Writer needs completely idle node. */ - if (atomic_cmpset_acq_long(&ngq->q_flags, 0, WRITER_ACTIVE)) { + if (atomic_cmpset_acq_int(&node->nd_input_queue.q_flags, + 0, WRITER_ACTIVE)) { /* Successfully grabbed node */ CTR4(KTR_NET, "%20s: node [%x] (%p) acquired item %p", - __func__, ngq->q_node->nd_ID, ngq->q_node, item); + __func__, node->nd_ID, node, item); return (item); } /* Queue the request for later. */ - ng_queue_rw(ngq, item, NGQRW_W); + ng_queue_rw(node, item, NGQRW_W); return (NULL); } #if 0 static __inline item_p -ng_upgrade_write(struct ng_queue *ngq, item_p item) +ng_upgrade_write(node_p node, item_p item) { - KASSERT(ngq != &ng_deadnode.nd_input_queue, + struct ng_queue *ngq = &node->nd_input_queue; + KASSERT(node != &ng_deadnode, ("%s: working on deadnode", __func__)); NGI_SET_WRITER(item); - mtx_lock_spin(&(ngq->q_mtx)); + NG_QUEUE_LOCK(ngq); /* * There will never be no readers as we are there ourselves. @@ -2028,9 +2024,9 @@ ng_upgrade_write(struct ng_queue *ngq, item_p item) * if there are no readers. We don't really care if there are queued * items as we will bypass them anyhow. */ - atomic_add_long(&ngq->q_flags, WRITER_ACTIVE - READER_INCREMENT); - if (ngq->q_flags & (NGQ_WMASK & ~OP_PENDING) == WRITER_ACTIVE) { - mtx_unlock_spin(&(ngq->q_mtx)); + atomic_add_int(&ngq->q_flags, WRITER_ACTIVE - READER_INCREMENT); + if ((ngq->q_flags & (NGQ_WMASK & ~OP_PENDING)) == WRITER_ACTIVE) { + NG_QUEUE_UNLOCK(ngq); /* It's just us, act on the item. */ /* will NOT drop writer lock when done */ @@ -2040,7 +2036,7 @@ ng_upgrade_write(struct ng_queue *ngq, item_p item) * Having acted on the item, atomically * down grade back to READER and finish up */ - atomic_add_long(&ngq->q_flags, + atomic_add_int(&ngq->q_flags, READER_INCREMENT - WRITER_ACTIVE); /* Our caller will call ng_leave_read() */ @@ -2053,62 +2049,53 @@ ng_upgrade_write(struct ng_queue *ngq, item_p item) * through it once. If there is nothing else waiting, * set the correct flags. */ - if ((item->el_next = ngq->queue) == NULL) { - /* - * Set up the "last" pointer. - * We are the only (and thus last) item - */ - ngq->last = &(item->el_next); - + if (STAILQ_EMPTY(&ngq->queue)) { /* We've gone from, 0 to 1 item in the queue */ - atomic_set_long(&ngq->q_flags, OP_PENDING); + atomic_set_int(&ngq->q_flags, OP_PENDING); CTR3(KTR_NET, "%20s: node [%x] (%p) set OP_PENDING", __func__, - ngq->q_node->nd_ID, ngq->q_node); + node->nd_ID, node); }; - ngq->queue = item; - CTR5(KTR_NET, "%20s: node [%x] (%p) requeued item %p as WRITER", - __func__, ngq->q_node->nd_ID, ngq->q_node, item ); + STAILQ_INSERT_HEAD(&ngq->queue, item, el_next); + CTR4(KTR_NET, "%20s: node [%x] (%p) requeued item %p as WRITER", + __func__, node->nd_ID, node, item ); /* Reverse what we did above. That downgrades us back to reader */ - atomic_add_long(&ngq->q_flags, READER_INCREMENT - WRITER_ACTIVE); + atomic_add_int(&ngq->q_flags, READER_INCREMENT - WRITER_ACTIVE); if (QUEUE_ACTIVE(ngq) && NEXT_QUEUED_ITEM_CAN_PROCEED(ngq)) - ng_worklist_add(ngq->q_node); - mtx_unlock_spin(&(ngq->q_mtx)); + ng_worklist_add(node); + NG_QUEUE_UNLOCK(ngq); return; } - #endif /* Release reader lock. */ static __inline void -ng_leave_read(struct ng_queue *ngq) +ng_leave_read(node_p node) { - atomic_subtract_rel_long(&ngq->q_flags, READER_INCREMENT); + atomic_subtract_rel_int(&node->nd_input_queue.q_flags, READER_INCREMENT); } /* Release writer lock. */ static __inline void -ng_leave_write(struct ng_queue *ngq) +ng_leave_write(node_p node) { - atomic_clear_rel_long(&ngq->q_flags, WRITER_ACTIVE); + atomic_clear_rel_int(&node->nd_input_queue.q_flags, WRITER_ACTIVE); } /* Purge node queue. Called on node shutdown. */ static void -ng_flush_input_queue(struct ng_queue * ngq) +ng_flush_input_queue(node_p node) { + struct ng_queue *ngq = &node->nd_input_queue; item_p item; NG_QUEUE_LOCK(ngq); - while (ngq->queue) { - item = ngq->queue; - ngq->queue = item->el_next; - if (ngq->last == &(item->el_next)) { - ngq->last = &(ngq->queue); - atomic_clear_long(&ngq->q_flags, OP_PENDING); - } + while ((item = STAILQ_FIRST(&ngq->queue)) != NULL) { + STAILQ_REMOVE_HEAD(&ngq->queue, el_next); + if (STAILQ_EMPTY(&ngq->queue)) + atomic_clear_int(&ngq->q_flags, OP_PENDING); NG_QUEUE_UNLOCK(ngq); /* If the item is supplying a callback, call it with an error */ @@ -2222,11 +2209,10 @@ ng_snd_item(item_p item, int flags) #endif } - ngq = &node->nd_input_queue; if (queue) { item->depth = 1; /* Put it on the queue for that node*/ - ng_queue_rw(ngq, item, rw); + ng_queue_rw(node, item, rw); return ((flags & NG_PROGRESS) ? EINPROGRESS : 0); } @@ -2235,9 +2221,9 @@ ng_snd_item(item_p item, int flags) * Try get the appropriate operating permission. */ if (rw == NGQRW_R) - item = ng_acquire_read(ngq, item); + item = ng_acquire_read(node, item); else - item = ng_acquire_write(ngq, item); + item = ng_acquire_write(node, item); /* Item was queued while trying to get permission. */ if (item == NULL) @@ -2249,10 +2235,11 @@ ng_snd_item(item_p item, int flags) error = ng_apply_item(node, item, rw); /* drops r/w lock when done */ /* If something is waiting on queue and ready, schedule it. */ + ngq = &node->nd_input_queue; if (QUEUE_ACTIVE(ngq)) { NG_QUEUE_LOCK(ngq); if (QUEUE_ACTIVE(ngq) && NEXT_QUEUED_ITEM_CAN_PROCEED(ngq)) - ng_worklist_add(ngq->q_node); + ng_worklist_add(node); NG_QUEUE_UNLOCK(ngq); } @@ -2407,9 +2394,9 @@ ng_apply_item(node_p node, item_p item, int rw) NG_HOOK_UNREF(hook); if (rw == NGQRW_R) - ng_leave_read(&node->nd_input_queue); + ng_leave_read(node); else - ng_leave_write(&node->nd_input_queue); + ng_leave_write(node); /* Apply callback. */ if (apply != NULL) { @@ -3214,12 +3201,12 @@ ngintr(void) /* Get node from the worklist. */ NG_WORKLIST_LOCK(); - node = TAILQ_FIRST(&ng_worklist); + node = STAILQ_FIRST(&ng_worklist); if (!node) { NG_WORKLIST_UNLOCK(); break; } - TAILQ_REMOVE(&ng_worklist, node, nd_work); + STAILQ_REMOVE_HEAD(&ng_worklist, nd_input_queue.q_work); NG_WORKLIST_UNLOCK(); CTR3(KTR_NET, "%20s: node [%x] (%p) taken off worklist", __func__, node->nd_ID, node); @@ -3237,9 +3224,9 @@ ngintr(void) int rw; NG_QUEUE_LOCK(&node->nd_input_queue); - item = ng_dequeue(&node->nd_input_queue, &rw); + item = ng_dequeue(node, &rw); if (item == NULL) { - atomic_clear_int(&node->nd_flags, NGF_WORKQ); + node->nd_input_queue.q_flags2 &= ~NGQ2_WORKQ; NG_QUEUE_UNLOCK(&node->nd_input_queue); break; /* go look for another node */ } else { @@ -3264,15 +3251,15 @@ ng_worklist_add(node_p node) mtx_assert(&node->nd_input_queue.q_mtx, MA_OWNED); - if ((node->nd_flags & NGF_WORKQ) == 0) { + if ((node->nd_input_queue.q_flags2 & NGQ2_WORKQ) == 0) { /* * If we are not already on the work queue, * then put us on. */ - atomic_set_int(&node->nd_flags, NGF_WORKQ); + node->nd_input_queue.q_flags2 |= NGQ2_WORKQ; NG_NODE_REF(node); /* XXX fafe in mutex? */ NG_WORKLIST_LOCK(); - TAILQ_INSERT_TAIL(&ng_worklist, node, nd_work); + STAILQ_INSERT_TAIL(&ng_worklist, node, nd_input_queue.q_work); NG_WORKLIST_UNLOCK(); schednetisr(NETISR_NETGRAPH); CTR3(KTR_NET, "%20s: node [%x] (%p) put on worklist", __func__, |