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https://gitlab.nic.cz/labs/bird.git
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BMP: simplified update queuing
This commit drops an unnecessary layer of indirection, allocates the output blocks by 1M chunks and drops most of the intermediary allocations from the heap altogether.
This commit is contained in:
Maria Matejka
Maria Matejka
parent
0f9f6424cd
commit
3f371ddff2
195
proto/bmp/bmp.c
195
proto/bmp/bmp.c
@ -225,6 +225,14 @@ bmp_send_peer_up_notif_msg(struct bmp_proto *p, const struct bgp_proto *bgp,
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static void bmp_route_monitor_end_of_rib(struct bmp_proto *p, struct bmp_stream *bs);
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// Stores TX data
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struct bmp_tx_buffer {
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resource r;
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node n;
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byte *end;
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byte buf[0xfff00];
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};
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// Stores necessary any data in list
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struct bmp_data_node {
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node n;
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@ -274,22 +282,65 @@ bmp_init_msg_serialize(buffer *stream, const char *sys_descr, const char *sys_na
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bmp_info_tlv_hdr_serialize(stream, BMP_INFO_TLV_TYPE_SYS_NAME, sys_name);
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}
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static void btb_free(resource *r UNUSED) {
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UNUSED struct bmp_tx_buffer *btb = SKIP_BACK(struct bmp_tx_buffer, r, r);
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}
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static void
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btb_dump(resource *r)
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{
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struct bmp_tx_buffer *btb = SKIP_BACK(struct bmp_tx_buffer, r, r);
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debug("used %u bytes\n", btb->end - btb->buf);
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}
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static struct resmem
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btb_memsize(resource *r)
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{
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struct bmp_tx_buffer *btb = SKIP_BACK(struct bmp_tx_buffer, r, r);
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return (struct resmem) {
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.effective = btb->end - btb->buf,
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.overhead = (sizeof *btb) - (btb->end - btb->buf),
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};
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}
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static struct resclass bmp_tx_buffer_class = {
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.name = "BMP TX buffer",
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.size = sizeof(struct bmp_tx_buffer),
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.free = btb_free,
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.dump = btb_dump,
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.memsize = btb_memsize,
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};
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static void
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bmp_schedule_tx_packet(struct bmp_proto *p, const byte *payload, const size_t size)
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{
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ASSERT(p->started);
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struct bmp_data_node *tx_data = mb_alloc(p->tx_mem_pool, sizeof (struct bmp_data_node));
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tx_data->data = mb_alloc(p->tx_mem_pool, size);
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memcpy(tx_data->data, payload, size);
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tx_data->data_size = size;
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add_tail(&p->tx_queue, &tx_data->n);
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// log(L_INFO "schedule tx packet %p %u", payload, size);
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if (sk_tx_buffer_empty(p->sk)
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&& !ev_active(p->tx_ev))
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struct bmp_tx_buffer *btb = EMPTY_LIST(p->tx_queue) ? NULL :
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SKIP_BACK(struct bmp_tx_buffer, n, TAIL(p->tx_queue));
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if (btb && (btb->end + size > btb->buf + sizeof btb->buf))
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btb = NULL;
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if (!btb)
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{
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ev_schedule(p->tx_ev);
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btb = ralloc(p->tx_mem_pool, &bmp_tx_buffer_class);
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btb->end = btb->buf;
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btb->n = (node) {};
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add_tail(&p->tx_queue, &btb->n);
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// log(L_INFO "btb alloc buf %p end %p", btb->buf, btb->end);
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}
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else
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{
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// log(L_INFO "btb found buf %p end %p", btb->buf, btb->end);
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}
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memcpy(btb->end, payload, size);
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btb->end += size;
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if (!p->sk->tbuf && !ev_active(p->tx_ev))
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ev_schedule(p->tx_ev);
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}
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static void
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@ -305,35 +356,33 @@ bmp_fire_tx(void *p_)
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"Called BMP TX event handler when there is not any data to send"
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);
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size_t cnt = 0; // Counts max packets which we want to send per TX slot
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struct bmp_data_node *tx_data;
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struct bmp_data_node *tx_data_next;
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WALK_LIST_DELSAFE(tx_data, tx_data_next, p->tx_queue)
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int cnt = 0;
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struct bmp_tx_buffer *btb;
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WALK_LIST_FIRST2(btb, n, p->tx_queue)
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{
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if (tx_data->data_size > p->sk->tbsize)
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{
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sk_set_tbsize(p->sk, tx_data->data_size);
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}
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size_t data_size = tx_data->data_size;
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memcpy(p->sk->tbuf, tx_data->data, data_size);
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mb_free(tx_data->data);
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rem_node((node *) tx_data);
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mb_free(tx_data);
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if (sk_send(p->sk, data_size) <= 0)
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if (p->tx_pending)
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return;
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// BMP packets should be treat with lowest priority when scheduling sending
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// packets to target. That's why we want to send max. 32 packets per event
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// call
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if (++cnt > 32)
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rem_node(&btb->n);
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p->sk->tbuf = btb->buf;
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p->tx_pending = btb;
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// log(L_INFO "btb send buf %p end %p", btb->buf, btb->end);
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if (sk_send(p->sk, btb->end - btb->buf) <= 0)
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return;
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// log(L_INFO "btb free buf %p", btb->buf);
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p->sk->tbuf = NULL;
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p->tx_pending = NULL;
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rfree(&btb->r);
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if (cnt++ > 32)
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{
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if (!ev_active(p->tx_ev))
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{
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ev_schedule(p->tx_ev);
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}
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ev_schedule(p->tx_ev);
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return;
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}
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}
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@ -342,6 +391,14 @@ bmp_fire_tx(void *p_)
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static void
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bmp_tx(struct birdsock *sk)
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{
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struct bmp_proto *p = sk->data;
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// log(L_INFO "btb free buf %p", p->tx_pending);
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rfree(&p->tx_pending->r);
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p->tx_pending = NULL;
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sk->tbuf = NULL;
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bmp_fire_tx(sk->data);
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}
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@ -783,25 +840,27 @@ bmp_send_peer_up_notif_msg(struct bmp_proto *p, const struct bgp_proto *bgp,
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static void
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bmp_route_monitor_put_update(struct bmp_proto *p, struct bmp_stream *bs, const byte *data, size_t length, btime timestamp)
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{
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struct bmp_data_node *upd_msg = mb_alloc(p->update_msg_mem_pool,
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sizeof (struct bmp_data_node));
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upd_msg->data = mb_alloc(p->update_msg_mem_pool, length);
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memcpy(upd_msg->data, data, length);
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upd_msg->data_size = length;
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add_tail(&p->update_msg_queue, &upd_msg->n);
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static byte locbuf[0xff000];
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buffer payload = {
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.start = locbuf,
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.pos = locbuf,
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.end = locbuf + sizeof locbuf,
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};
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/* Save some metadata */
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struct bgp_proto *bgp = bs->bgp;
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upd_msg->remote_as = bgp->remote_as;
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upd_msg->remote_id = bgp->remote_id;
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upd_msg->remote_ip = bgp->remote_ip;
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upd_msg->timestamp = timestamp;
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upd_msg->global_peer = bmp_is_peer_global_instance(bgp);
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upd_msg->policy = bmp_stream_policy(bs);
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bmp_route_monitor_msg_serialize(&payload,
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bmp_is_peer_global_instance(bgp),
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bmp_stream_policy(bs),
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bgp->remote_as,
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bgp->remote_id,
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true,
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bgp->remote_ip,
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data,
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length,
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timestamp
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);
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/* Kick the commit */
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if (!ev_active(p->update_ev))
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ev_schedule(p->update_ev);
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bmp_schedule_tx_packet(p, locbuf, payload.pos - locbuf);
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}
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static void
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@ -820,38 +879,6 @@ bmp_route_monitor_notify(struct bmp_proto *p, struct bmp_stream *bs,
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log(L_WARN "%s: Cannot encode update for %N", p->p.name, n);
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}
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static void
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bmp_route_monitor_commit(void *p_)
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{
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struct bmp_proto *p = p_;
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if (!p->started)
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return;
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buffer payload
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= bmp_buffer_alloc(p->buffer_mpool, DEFAULT_MEM_BLOCK_SIZE);
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struct bmp_data_node *data, *data_next;
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WALK_LIST_DELSAFE(data, data_next, p->update_msg_queue)
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{
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bmp_route_monitor_msg_serialize(&payload,
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data->global_peer, data->policy,
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data->remote_as, data->remote_id, true,
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data->remote_ip, data->data, data->data_size,
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data->timestamp);
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bmp_schedule_tx_packet(p, bmp_buffer_data(&payload), bmp_buffer_pos(&payload));
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bmp_buffer_flush(&payload);
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mb_free(data->data);
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rem_node(&data->n);
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mb_free(data);
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}
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bmp_buffer_free(&payload);
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}
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static void
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bmp_route_monitor_end_of_rib(struct bmp_proto *p, struct bmp_stream *bs)
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{
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@ -967,12 +994,13 @@ bmp_send_termination_msg(struct bmp_proto *p,
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bmp_put_u16(&stream, BMP_TERM_INFO_REASON);
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bmp_put_u16(&stream, BMP_TERM_REASON_CODE_SIZE); // 2-byte code indication the reason
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bmp_put_u16(&stream, reason);
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memcpy(p->sk->tbuf, bmp_buffer_data(&stream), bmp_buffer_pos(&stream));
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p->sk->tbuf = bmp_buffer_data(&stream);
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IF_COND_TRUE_PRINT_ERR_MSG_AND_RETURN_OPT_VAL(
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sk_send(p->sk, bmp_buffer_pos(&stream)) < 0,
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"Failed to send BMP termination message"
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);
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p->sk->tbuf = NULL;
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bmp_buffer_free(&stream);
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}
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@ -1119,7 +1147,6 @@ bmp_connect(struct bmp_proto *p)
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sk->dport = p->station_port;
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sk->ttl = IP4_MAX_TTL;
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sk->tos = IP_PREC_INTERNET_CONTROL;
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sk->tbsize = BGP_TX_BUFFER_EXT_SIZE;
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sk->tx_hook = bmp_connected;
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sk->err_hook = bmp_sock_err;
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@ -1245,9 +1272,8 @@ bmp_start(struct proto *P)
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p->buffer_mpool = rp_new(P->pool, "BMP Buffer");
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p->tx_mem_pool = rp_new(P->pool, "BMP Tx");
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p->update_msg_mem_pool = rp_new(P->pool, "BMP Update");
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p->tx_ev = ev_new_init(p->p.pool, bmp_fire_tx, p);
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p->update_ev = ev_new_init(p->p.pool, bmp_route_monitor_commit, p);
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p->tx_pending = NULL;
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p->connect_retry_timer = tm_new_init(p->p.pool, bmp_connection_retry, p, 0, 0);
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p->sk = NULL;
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@ -1256,7 +1282,6 @@ bmp_start(struct proto *P)
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HASH_INIT(p->table_map, P->pool, 4);
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init_list(&p->tx_queue);
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init_list(&p->update_msg_queue);
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p->started = false;
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p->sock_err = 0;
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add_tail(&bmp_proto_list, &p->bmp_node);
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@ -66,10 +66,9 @@ struct bmp_proto {
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// struct bmp_peer_map bgp_peers; // Stores 'bgp_proto' structure per BGP peer
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pool *buffer_mpool; // Memory pool used for BMP buffer allocations
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pool *tx_mem_pool; // Memory pool used for packet allocations designated to BMP collector
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pool *update_msg_mem_pool; // Memory pool used for BPG UPDATE MSG allocations
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list tx_queue; // Stores queued packets going to be sent
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struct bmp_tx_buffer *tx_pending;// This buffer waits for socket to flush
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timer *connect_retry_timer; // Timer for retrying connection to the BMP collector
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list update_msg_queue; // Stores all composed BGP UPDATE MSGs
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bool started; // Flag that stores running status of BMP instance
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int sock_err; // Last socket error code
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};
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