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-rw-r--r--VNFs/DPPD-PROX/packet_utils.c20
-rw-r--r--VNFs/DPPD-PROX/packet_utils.h11
-rw-r--r--VNFs/DPPD-PROX/tx_pkt.c16
-rw-r--r--VNFs/DPPD-PROX/tx_pkt.h2
4 files changed, 36 insertions, 13 deletions
diff --git a/VNFs/DPPD-PROX/packet_utils.c b/VNFs/DPPD-PROX/packet_utils.c
index fb467555..e06529c4 100644
--- a/VNFs/DPPD-PROX/packet_utils.c
+++ b/VNFs/DPPD-PROX/packet_utils.c
@@ -24,6 +24,7 @@
#include "defines.h"
#include "handle_master.h"
#include "prox_port_cfg.h"
+#include "packet_utils.h"
static inline int find_ip(struct ether_hdr_arp *pkt, uint16_t len, uint32_t *ip_dst)
{
@@ -76,7 +77,7 @@ static inline int find_ip(struct ether_hdr_arp *pkt, uint16_t len, uint32_t *ip_
but this would require either thread safety, or the the exchange of information between master and generating core.
*/
-int write_dst_mac(struct task_base *tbase, struct rte_mbuf *mbuf, uint32_t *ip_dst)
+int write_dst_mac(struct task_base *tbase, struct rte_mbuf *mbuf, uint32_t *ip_dst, uint64_t **time)
{
const uint64_t hz = rte_get_tsc_hz();
struct ether_hdr_arp *packet = rte_pktmbuf_mtod(mbuf, struct ether_hdr_arp *);
@@ -89,8 +90,9 @@ int write_dst_mac(struct task_base *tbase, struct rte_mbuf *mbuf, uint32_t *ip_d
memcpy(mac, &l3->gw.mac, sizeof(prox_rte_ether_addr));
return SEND_MBUF;
} else if (tsc > l3->gw.arp_update_time) {
- // long time since we have sent an arp, send arp
- l3->gw.arp_update_time = tsc + l3->arp_update_time * hz / 1000;
+ // long time since we have successfully sent an arp, send arp
+ // If sending ARP failed (ring full) then arp_update_time is not updated to avoid having to wait 1 sec to send ARP REQ again
+ *time = &l3->gw.arp_update_time;
*ip_dst = l3->gw.ip;
if ((l3->flags & FLAG_DST_MAC_KNOWN) && (tsc < l3->gw.arp_timeout)){
// MAC is valid in the table => send also the mbuf
@@ -121,7 +123,7 @@ int write_dst_mac(struct task_base *tbase, struct rte_mbuf *mbuf, uint32_t *ip_d
return SEND_MBUF;
} else if (tsc > l3->optimized_arp_table[idx].arp_update_time) {
// ARP not sent since a long time, send ARP
- l3->optimized_arp_table[idx].arp_update_time = tsc + l3->arp_update_time * hz / 1000;
+ *time = &l3->optimized_arp_table[idx].arp_update_time;
if (tsc < l3->optimized_arp_table[idx].arp_timeout) {
// MAC still valid => also send mbuf
memcpy(mac, &l3->optimized_arp_table[idx].mac, sizeof(prox_rte_ether_addr));
@@ -138,7 +140,7 @@ int write_dst_mac(struct task_base *tbase, struct rte_mbuf *mbuf, uint32_t *ip_d
}
// IP address not found in table
l3->optimized_arp_table[l3->n_pkts].ip = *ip_dst;
- l3->optimized_arp_table[l3->n_pkts].arp_update_time = tsc + l3->arp_update_time * hz / 1000;
+ *time = &l3->optimized_arp_table[l3->n_pkts].arp_update_time;
l3->n_pkts++;
if (l3->n_pkts < 4) {
@@ -172,7 +174,7 @@ int write_dst_mac(struct task_base *tbase, struct rte_mbuf *mbuf, uint32_t *ip_d
return DROP_MBUF;
} else {
l3->arp_table[ret].ip = *ip_dst;
- l3->arp_table[ret].arp_update_time = tsc + l3->arp_update_time * hz / 1000;
+ *time = &l3->arp_table[ret].arp_update_time;
}
return SEND_ARP;
} else {
@@ -183,7 +185,7 @@ int write_dst_mac(struct task_base *tbase, struct rte_mbuf *mbuf, uint32_t *ip_d
return SEND_MBUF;
} else if (tsc > l3->arp_table[ret].arp_update_time) {
// ARP not sent since a long time, send ARP
- l3->arp_table[ret].arp_update_time = tsc + l3->arp_update_time * hz / 1000;
+ *time = &l3->arp_table[ret].arp_update_time;
if (tsc < l3->arp_table[ret].arp_timeout) {
// MAC still valid => send also MBUF
memcpy(mac, &l3->arp_table[ret].mac, sizeof(prox_rte_ether_addr));
@@ -230,6 +232,7 @@ void task_init_l3(struct task_base *tbase, struct task_args *targ)
tbase->l3.core_id = targ->lconf->id;
tbase->l3.task_id = targ->id;
tbase->l3.tmaster = targ->tmaster;
+ tbase->l3.seed = (uint)rte_rdtsc();
if (targ->arp_timeout != 0)
tbase->l3.arp_timeout = targ->arp_timeout;
else
@@ -344,6 +347,7 @@ void handle_ctrl_plane_pkts(struct task_base *tbase, struct rte_mbuf **mbufs, ui
memcpy(&l3->gw.mac, &hdr->arp.data.sha, 6);
l3->flags |= FLAG_DST_MAC_KNOWN;
l3->gw.arp_timeout = tsc + update_time;
+ update_arp_update_time(l3, &l3->gw.arp_update_time, l3->arp_update_time);
} else if (l3->n_pkts < 4) {
// Few packets tracked - should be faster to loop through them thean using a hash table
for (idx = 0; idx < l3->n_pkts; idx++) {
@@ -354,6 +358,7 @@ void handle_ctrl_plane_pkts(struct task_base *tbase, struct rte_mbuf **mbufs, ui
if (idx < l3->n_pkts) {
memcpy(&l3->optimized_arp_table[idx].mac, &(hdr->arp.data.sha), sizeof(prox_rte_ether_addr));
l3->optimized_arp_table[idx].arp_timeout = tsc + update_time;
+ update_arp_update_time(l3, &l3->optimized_arp_table[idx].arp_update_time, l3->arp_update_time);
}
} else {
int ret = rte_hash_add_key(l3->ip_hash, (const void *)&ip);
@@ -362,6 +367,7 @@ void handle_ctrl_plane_pkts(struct task_base *tbase, struct rte_mbuf **mbufs, ui
} else {
memcpy(&l3->arp_table[ret].mac, &(hdr->arp.data.sha), sizeof(prox_rte_ether_addr));
l3->arp_table[ret].arp_timeout = tsc + update_time;
+ update_arp_update_time(l3, &l3->arp_table[ret].arp_update_time, l3->arp_update_time);
}
}
tx_drop(mbufs[j]);
diff --git a/VNFs/DPPD-PROX/packet_utils.h b/VNFs/DPPD-PROX/packet_utils.h
index d6e2dbb9..a111b944 100644
--- a/VNFs/DPPD-PROX/packet_utils.h
+++ b/VNFs/DPPD-PROX/packet_utils.h
@@ -60,13 +60,22 @@ struct l3_base {
struct rte_hash *ip_hash;
struct arp_table *arp_table;
struct rte_mempool *arp_pool;
+ uint seed;
};
void task_init_l3(struct task_base *tbase, struct task_args *targ);
void task_start_l3(struct task_base *tbase, struct task_args *targ);
-int write_dst_mac(struct task_base *tbase, struct rte_mbuf *mbuf, uint32_t *ip_dst);
+int write_dst_mac(struct task_base *tbase, struct rte_mbuf *mbuf, uint32_t *ip_dst, uint64_t **time);
void task_set_gateway_ip(struct task_base *tbase, uint32_t ip);
void task_set_local_ip(struct task_base *tbase, uint32_t ip);
void handle_ctrl_plane_pkts(struct task_base *tbase, struct rte_mbuf **mbufs, uint16_t n_pkts);
+static inline void update_arp_update_time(struct l3_base *l3, uint64_t *ptr, uint32_t base)
+{
+ // randomize timers - from 0.5 to 1.5 * configured time
+ const uint64_t hz = rte_get_tsc_hz();
+ uint64_t tsc = rte_rdtsc();
+ uint64_t rand = 500 + (1000L * rand_r(&l3->seed)) / RAND_MAX;
+ *ptr = tsc + (base * rand / 1000) * hz / 1000;
+}
#endif /* _PACKET_UTILS_H_ */
diff --git a/VNFs/DPPD-PROX/tx_pkt.c b/VNFs/DPPD-PROX/tx_pkt.c
index e789d305..8bf501f6 100644
--- a/VNFs/DPPD-PROX/tx_pkt.c
+++ b/VNFs/DPPD-PROX/tx_pkt.c
@@ -56,11 +56,12 @@ int tx_pkt_l3(struct task_base *tbase, struct rte_mbuf **mbufs, uint16_t n_pkts,
int first = 0, ret, ok = 0, rc;
const struct port_queue *port_queue = &tbase->tx_params_hw.tx_port_queue[0];
struct rte_mbuf *arp_mbuf = NULL; // used when one need to send both an ARP and a mbuf
+ uint64_t *time;
for (int j = 0; j < n_pkts; j++) {
if ((out) && (out[j] >= OUT_HANDLED))
continue;
- if (unlikely((rc = write_dst_mac(tbase, mbufs[j], &ip_dst)) != SEND_MBUF)) {
+ if (unlikely((rc = write_dst_mac(tbase, mbufs[j], &ip_dst, &time)) != SEND_MBUF)) {
if (j - first) {
ret = tbase->aux->tx_pkt_l2(tbase, mbufs + first, j - first, out);
ok += ret;
@@ -70,14 +71,20 @@ int tx_pkt_l3(struct task_base *tbase, struct rte_mbuf **mbufs, uint16_t n_pkts,
case SEND_ARP:
// We re-use the mbuf - no need to create a arp_mbuf and delete the existing mbuf
mbufs[j]->port = tbase->l3.reachable_port_id;
- tx_ring_cti(tbase, tbase->l3.ctrl_plane_ring, REQ_MAC_TO_CTRL, mbufs[j], tbase->l3.core_id, tbase->l3.task_id, ip_dst);
+ if (tx_ring_cti(tbase, tbase->l3.ctrl_plane_ring, REQ_MAC_TO_CTRL, mbufs[j], tbase->l3.core_id, tbase->l3.task_id, ip_dst) == 0)
+ update_arp_update_time(&tbase->l3, time, 1000);
+ else
+ update_arp_update_time(&tbase->l3, time, 100);
break;
case SEND_MBUF_AND_ARP:
// We send the mbuf and an ARP - we need to allocate another mbuf for ARP
ret = rte_mempool_get(tbase->l3.arp_pool, (void **)&arp_mbuf);
if (likely(ret == 0)) {
arp_mbuf->port = tbase->l3.reachable_port_id;
- tx_ring_cti(tbase, tbase->l3.ctrl_plane_ring, REQ_MAC_TO_CTRL, arp_mbuf, tbase->l3.core_id, tbase->l3.task_id, ip_dst);
+ if (tx_ring_cti(tbase, tbase->l3.ctrl_plane_ring, REQ_MAC_TO_CTRL, arp_mbuf, tbase->l3.core_id, tbase->l3.task_id, ip_dst) == 0)
+ update_arp_update_time(&tbase->l3, time, 1000);
+ else
+ update_arp_update_time(&tbase->l3, time, 100);
} else {
plog_err("Failed to get a mbuf from arp mempool\n");
// We still send the initial mbuf
@@ -805,7 +812,7 @@ static inline int tx_ring_all(struct task_base *tbase, struct rte_ring *ring, ui
return rte_ring_enqueue(ring, mbuf);
}
-void tx_ring_cti(struct task_base *tbase, struct rte_ring *ring, uint16_t command, struct rte_mbuf *mbuf, uint8_t core_id, uint8_t task_id, uint32_t ip)
+int tx_ring_cti(struct task_base *tbase, struct rte_ring *ring, uint16_t command, struct rte_mbuf *mbuf, uint8_t core_id, uint8_t task_id, uint32_t ip)
{
plogx_dbg("\tSending command %s with ip %d.%d.%d.%d to ring %p using mbuf %p, core %d and task %d - ring size now %d\n", actions_string[command], IP4(ip), ring, mbuf, core_id, task_id, rte_ring_free_count(ring));
int ret = tx_ring_all(tbase, ring, command, mbuf, core_id, task_id, ip);
@@ -814,6 +821,7 @@ void tx_ring_cti(struct task_base *tbase, struct rte_ring *ring, uint16_t comman
TASK_STATS_ADD_DROP_DISCARD(&tbase->aux->stats, 1);
rte_pktmbuf_free(mbuf);
}
+ return ret;
}
void tx_ring_ip(struct task_base *tbase, struct rte_ring *ring, uint16_t command, struct rte_mbuf *mbuf, uint32_t ip)
diff --git a/VNFs/DPPD-PROX/tx_pkt.h b/VNFs/DPPD-PROX/tx_pkt.h
index a6881531..708a9837 100644
--- a/VNFs/DPPD-PROX/tx_pkt.h
+++ b/VNFs/DPPD-PROX/tx_pkt.h
@@ -82,7 +82,7 @@ uint16_t tx_try_self(struct task_base *tbase, struct rte_mbuf **mbufs, uint16_t
int tx_pkt_drop_all(struct task_base *tbase, struct rte_mbuf **mbufs, uint16_t n_pkts, uint8_t *out);
int tx_pkt_l3(struct task_base *tbase, struct rte_mbuf **mbufs, uint16_t n_pkts, uint8_t *out);
-void tx_ring_cti(struct task_base *tbase, struct rte_ring *ring, uint16_t command, struct rte_mbuf *mbuf, uint8_t core_id, uint8_t task_id, uint32_t ip);
+int tx_ring_cti(struct task_base *tbase, struct rte_ring *ring, uint16_t command, struct rte_mbuf *mbuf, uint8_t core_id, uint8_t task_id, uint32_t ip);
void tx_ring_ip(struct task_base *tbase, struct rte_ring *ring, uint16_t command, struct rte_mbuf *mbuf, uint32_t ip);
void tx_ring(struct task_base *tbase, struct rte_ring *ring, uint16_t command, struct rte_mbuf *mbuf);