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Diffstat (limited to 'VNFs/DPPD-PROX/handle_gen.c')
-rw-r--r--VNFs/DPPD-PROX/handle_gen.c88
1 files changed, 41 insertions, 47 deletions
diff --git a/VNFs/DPPD-PROX/handle_gen.c b/VNFs/DPPD-PROX/handle_gen.c
index 32a351f..643c61c 100644
--- a/VNFs/DPPD-PROX/handle_gen.c
+++ b/VNFs/DPPD-PROX/handle_gen.c
@@ -85,7 +85,6 @@ struct task_gen_pcap {
struct task_gen {
struct task_base base;
uint64_t hz;
- uint64_t link_speed;
struct token_time token_time;
struct local_mbuf local_mbuf;
struct pkt_template *pkt_template; /* packet templates used at runtime */
@@ -123,6 +122,7 @@ struct task_gen {
uint8_t flags;
uint8_t cksum_offload;
struct prox_port_cfg *port;
+ uint64_t *bytes_to_tsc;
} __rte_cache_aligned;
static inline uint8_t ipv4_get_hdr_len(struct ipv4_hdr *ip)
@@ -261,15 +261,9 @@ static int handle_gen_pcap_bulk(struct task_base *tbase, struct rte_mbuf **mbuf,
return task->base.tx_pkt(&task->base, new_pkts, send_bulk, NULL);
}
-static uint64_t bytes_to_tsc(struct task_gen *task, uint32_t bytes)
+static inline uint64_t bytes_to_tsc(struct task_gen *task, uint32_t bytes)
{
- const uint64_t hz = task->hz;
- const uint64_t bytes_per_hz = task->link_speed;
-
- if (bytes_per_hz == UINT64_MAX)
- return 0;
-
- return hz * bytes / bytes_per_hz;
+ return task->bytes_to_tsc[bytes];
}
static uint32_t task_gen_next_pkt_idx(const struct task_gen *task, uint32_t pkt_idx)
@@ -439,8 +433,12 @@ static uint64_t task_gen_calc_bulk_duration(struct task_gen *task, uint32_t coun
uint32_t pkt_idx = task_gen_offset_pkt_idx(task, - 1);
struct pkt_template *last_pkt_template = &task->pkt_template[pkt_idx];
uint32_t last_pkt_len = pkt_len_to_wire_size(last_pkt_template->len);
+#ifdef NO_EXTRAPOLATION
+ uint64_t bulk_duration = task->pkt_tsc_offset[count - 1];
+#else
uint64_t last_pkt_duration = bytes_to_tsc(task, last_pkt_len);
uint64_t bulk_duration = task->pkt_tsc_offset[count - 1] + last_pkt_duration;
+#endif
return bulk_duration;
}
@@ -475,6 +473,14 @@ static uint64_t task_gen_write_latency(struct task_gen *task, uint8_t **pkt_hdr,
simply sleeping until delta_t is zero would leave a period
of silence on the line. The error has been introduced
earlier, but the packets have already been sent. */
+
+ /* This happens typically if previous bulk was delayed
+ by an interrupt e.g. (with Time in nsec)
+ Time x: sleep 4 microsec
+ Time x+4000: send 64 packets (64 packets as 4000 nsec, w/ 10Gbps 64 bytes)
+ Time x+5000: send 16 packets (16 packets as 1000 nsec)
+ When we send the 16 packets, the 64 ealier packets are not yet
+ fully sent */
if (tx_tsc < task->earliest_tsc_next_pkt)
delta_t = task->earliest_tsc_next_pkt - tx_tsc;
else
@@ -483,12 +489,10 @@ static uint64_t task_gen_write_latency(struct task_gen *task, uint8_t **pkt_hdr,
for (uint16_t i = 0; i < count; ++i) {
uint32_t *pos = (uint32_t *)(pkt_hdr[i] + task->lat_pos);
const uint64_t pkt_tsc = tx_tsc + delta_t + task->pkt_tsc_offset[i];
-
*pos = pkt_tsc >> LATENCY_ACCURACY;
}
uint64_t bulk_duration = task_gen_calc_bulk_duration(task, count);
-
task->earliest_tsc_next_pkt = tx_tsc + delta_t + bulk_duration;
write_tsc_after = rte_rdtsc();
task->write_duration_estimate = write_tsc_after - write_tsc_before;
@@ -498,6 +502,7 @@ static uint64_t task_gen_write_latency(struct task_gen *task, uint8_t **pkt_hdr,
do {
tsc_before_tx = rte_rdtsc();
} while (tsc_before_tx < tx_tsc);
+
return tsc_before_tx;
}
@@ -537,7 +542,11 @@ static void task_gen_build_packets(struct task_gen *task, struct rte_mbuf **mbuf
mbufs[i]->udata64 = task->pkt_idx & TEMPLATE_INDEX_MASK;
struct ether_hdr *hdr = (struct ether_hdr *)pkt_hdr[i];
if (task->lat_enabled) {
+#ifdef NO_EXTRAPOLATION
+ task->pkt_tsc_offset[i] = 0;
+#else
task->pkt_tsc_offset[i] = bytes_to_tsc(task, will_send_bytes);
+#endif
will_send_bytes += pkt_len_to_wire_size(pkt_template->len);
}
task->pkt_idx = task_gen_next_pkt_idx(task, task->pkt_idx);
@@ -633,19 +642,6 @@ static int handle_gen_bulk(struct task_base *tbase, struct rte_mbuf **mbufs, uin
int i, j;
-#if RTE_VERSION < RTE_VERSION_NUM(16,4,0,0)
- // On more recent DPDK, we use the speed_capa of the port, and not the negotiated speed
- // If link is down, link_speed is 0
- if (unlikely(task->link_speed == 0)) {
- if (task->port && task->port->link_speed != 0) {
- task->link_speed = task->port->link_speed * 125000L;
- plog_info("\tPort %u: link speed is %ld Mbps\n",
- (uint8_t)(task->port - prox_port_cfg), 8 * task->link_speed / 1000000);
- } else
- return 0;
- }
-#endif
-
task_gen_update_config(task);
if (task->pkt_count == 0) {
@@ -1188,28 +1184,7 @@ static void start(struct task_base *tbase)
if (tbase->l3.tmaster) {
register_all_ip_to_ctrl_plane(task);
}
- if (task->port) {
- // task->port->link_speed reports the link speed in Mbps e.g. 40k for a 40 Gbps NIC.
- // task->link_speed reports link speed in Bytes per sec.
-#if RTE_VERSION < RTE_VERSION_NUM(16,4,0,0)
- // It can be 0 if link is down, and must hence be updated in fast path.
- task->link_speed = task->port->link_speed * 125000L;
- if (task->link_speed)
- plog_info("\tPort %u: link speed is %ld Mbps\n",
- (uint8_t)(task->port - prox_port_cfg), 8 * task->link_speed / 1000000);
- else
- plog_info("\tPort %u: link speed is %ld Mbps - link might be down\n",
- (uint8_t)(task->port - prox_port_cfg), 8 * task->link_speed / 1000000);
-#else
- if (task->port->link_speed == UINT32_MAX)
- task->link_speed = UINT64_MAX;
- else {
- task->link_speed = task->port->link_speed * 125000L;
- plog_info("\tPort %u: link max speed is %ld Mbps\n",
- (uint8_t)(task->port - prox_port_cfg), 8 * task->link_speed / 1000000);
- }
-#endif
- }
+
/* TODO
Handle the case when two tasks transmit to the same port
and one of them is stopped. In that case ARP (requests or replies)
@@ -1295,7 +1270,26 @@ static void init_task_gen(struct task_base *tbase, struct task_args *targ)
task->generator_id = targ->generator_id;
plog_info("\tGenerator id = %d\n", task->generator_id);
- task->link_speed = UINT64_MAX;
+
+ // Allocate array holding bytes to tsc for supported frame sizes
+ task->bytes_to_tsc = prox_zmalloc(task->max_frame_size * MAX_PKT_BURST * sizeof(task->bytes_to_tsc[0]), rte_lcore_to_socket_id(targ->lconf->id));
+ PROX_PANIC(task->bytes_to_tsc == NULL,
+ "Failed to allocate %u bytes (in huge pages) for bytes_to_tsc\n", task->max_frame_size);
+
+ // task->port->max_link_speed reports the maximum, non negotiated ink speed in Mbps e.g. 40k for a 40 Gbps NIC.
+ // It can be UINT32_MAX (virtual devices or not supported by DPDK < 16.04)
+ uint64_t bytes_per_hz = UINT64_MAX;
+ if ((task->port) && (task->port->max_link_speed != UINT32_MAX)) {
+ bytes_per_hz = task->port->max_link_speed * 125000L;
+ plog_info("\tPort %u: max link speed is %ld Mbps\n",
+ (uint8_t)(task->port - prox_port_cfg), 8 * bytes_per_hz / 1000000);
+ }
+ for (unsigned int i = 0; i < task->max_frame_size * MAX_PKT_BURST ; i++) {
+ if (bytes_per_hz == UINT64_MAX)
+ task->bytes_to_tsc[i] = 0;
+ else
+ task->bytes_to_tsc[i] = (task->hz * i) / bytes_per_hz;
+ }
if (!strcmp(targ->pcap_file, "")) {
plog_info("\tUsing inline definition of a packet\n");