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dpif-netdev: Add a partial HWOL PMD statistic.

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It is possible for packets traversing the userspace datapath to match a
flow before hitting on EMC by using a mark ID provided by a NIC. Add a
PMD statistic for this hit.

Signed-off-by: Cian Ferriter <cian.ferriter@intel.com>
Acked-by: Flavio Leitner <fbl@sysclose.org>
Signed-off-by: Ian Stokes <ian.stokes@intel.com>
This commit is contained in:
Cian Ferriter
2021-07-09 15:58:20 +00:00
committed by Ian Stokes
parent 3f86fdf5ce
commit d76a719a7a
7 changed files with 21 additions and 4 deletions
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9
lib/dpif-netdev.c
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@@ -646,6 +646,7 @@ pmd_info_show_stats(struct ds *reply,
" packets received: %"PRIu64"\n"
" packet recirculations: %"PRIu64"\n"
" avg. datapath passes per packet: %.02f\n"
" phwol hits: %"PRIu64"\n"
" emc hits: %"PRIu64"\n"
" smc hits: %"PRIu64"\n"
" megaflow hits: %"PRIu64"\n"
@@ -654,7 +655,8 @@ pmd_info_show_stats(struct ds *reply,
" miss with failed upcall: %"PRIu64"\n"
" avg. packets per output batch: %.02f\n",
total_packets, stats[PMD_STAT_RECIRC],
passes_per_pkt, stats[PMD_STAT_EXACT_HIT],
passes_per_pkt, stats[PMD_STAT_PHWOL_HIT],
stats[PMD_STAT_EXACT_HIT],
stats[PMD_STAT_SMC_HIT],
stats[PMD_STAT_MASKED_HIT], lookups_per_hit,
stats[PMD_STAT_MISS], stats[PMD_STAT_LOST],
@@ -1683,6 +1685,7 @@ dpif_netdev_get_stats(const struct dpif *dpif, struct dpif_dp_stats *stats)
CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
stats->n_flows += cmap_count(&pmd->flow_table);
pmd_perf_read_counters(&pmd->perf_stats, pmd_stats);
stats->n_hit += pmd_stats[PMD_STAT_PHWOL_HIT];
stats->n_hit += pmd_stats[PMD_STAT_EXACT_HIT];
stats->n_hit += pmd_stats[PMD_STAT_SMC_HIT];
stats->n_hit += pmd_stats[PMD_STAT_MASKED_HIT];
@@ -6805,7 +6808,7 @@ dfc_processing(struct dp_netdev_pmd_thread *pmd,
bool md_is_valid, odp_port_t port_no)
{
struct netdev_flow_key *key = &keys[0];
size_t n_missed = 0, n_emc_hit = 0;
size_t n_missed = 0, n_emc_hit = 0, n_phwol_hit = 0;
struct dfc_cache *cache = &pmd->flow_cache;
struct dp_packet *packet;
const size_t cnt = dp_packet_batch_size(packets_);
@@ -6852,6 +6855,7 @@ dfc_processing(struct dp_netdev_pmd_thread *pmd,
}
if (OVS_LIKELY(flow)) {
tcp_flags = parse_tcp_flags(packet);
n_phwol_hit++;
if (OVS_LIKELY(batch_enable)) {
dp_netdev_queue_batches(packet, flow, tcp_flags, batches,
n_batches);
@@ -6914,6 +6918,7 @@ dfc_processing(struct dp_netdev_pmd_thread *pmd,
/* Count of packets which are not flow batched. */
*n_flows = map_cnt;
pmd_perf_update_counter(&pmd->perf_stats, PMD_STAT_PHWOL_HIT, n_phwol_hit);
pmd_perf_update_counter(&pmd->perf_stats, PMD_STAT_EXACT_HIT, n_emc_hit);
if (!smc_enable_db) {