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test-conntrack: Add per zone benchmark tool.

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The current test-conntrack benchmark command runs with multiple threads
against a single conntrack zone. We now add a new benchmark-zones
command that allows us to check the performance between multiple zones.

We in there test the following scenarios for one zone while other zones
also contain entries:
1. Flushing a single full zone
2. Flushing a single empty zone
3. Committing new conntrack entries against a single zone
4. Running conntrack_execute without commit against the entries of a
   single zone

Signed-off-by: Felix Huettner <felix.huettner@mail.schwarz>
Signed-off-by: Simon Horman <horms@ovn.org>
This commit is contained in:
Felix Huettner 2024-04-24 14:44:47 +02:00 committed by Simon Horman
parent bf82d2cce2
commit c176635f51
1 changed files with 166 additions and 15 deletions
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181
tests/test-conntrack.c
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@ -25,36 +25,48 @@
#include "ovstest.h"
#include "pcap-file.h"
#include "timeval.h"
#include "stopwatch.h"
#define STOPWATCH_CT_EXECUTE_COMMIT "ct-execute-commit"
#define STOPWATCH_CT_EXECUTE_NO_COMMIT "ct-execute-no-commit"
#define STOPWATCH_FLUSH_FULL_ZONE "full-zone"
#define STOPWATCH_FLUSH_EMPTY_ZONE "empty-zone"
static const char payload[] = "50540000000a50540000000908004500001c0000000000"
"11a4cd0a0101010a0101020001000200080000";
static struct dp_packet *
build_packet(uint16_t udp_src, uint16_t udp_dst, ovs_be16 *dl_type)
{
struct udp_header *udp;
struct flow flow;
struct dp_packet *pkt = dp_packet_new(sizeof payload / 2);
dp_packet_put_hex(pkt, payload, NULL);
flow_extract(pkt, &flow);
udp = dp_packet_l4(pkt);
udp->udp_src = htons(udp_src);
udp->udp_dst = htons(udp_dst);
*dl_type = flow.dl_type;
return pkt;
}
static struct dp_packet_batch *
prepare_packets(size_t n, bool change, unsigned tid, ovs_be16 *dl_type)
{
struct dp_packet_batch *pkt_batch = xzalloc(sizeof *pkt_batch);
struct flow flow;
size_t i;
ovs_assert(n <= ARRAY_SIZE(pkt_batch->packets));
dp_packet_batch_init(pkt_batch);
for (i = 0; i < n; i++) {
struct udp_header *udp;
struct dp_packet *pkt = dp_packet_new(sizeof payload/2);
dp_packet_put_hex(pkt, payload, NULL);
flow_extract(pkt, &flow);
udp = dp_packet_l4(pkt);
udp->udp_src = htons(ntohs(udp->udp_src) + tid);
if (change) {
udp->udp_dst = htons(ntohs(udp->udp_dst) + i);
}
uint16_t udp_dst = change ? 2+1 : 2;
struct dp_packet *pkt = build_packet(1 + tid, udp_dst, dl_type);
dp_packet_batch_add(pkt_batch, pkt);
*dl_type = flow.dl_type;
}
return pkt_batch;
@ -153,6 +165,140 @@ test_benchmark(struct ovs_cmdl_context *ctx)
free(threads);
}
static void
test_benchmark_zones(struct ovs_cmdl_context *ctx)
{
unsigned long n_conns, n_zones, iterations;
long long start;
unsigned i, j;
ovs_be16 dl_type;
long long now = time_msec();
fatal_signal_init();
/* Parse arguments */
n_conns = strtoul(ctx->argv[1], NULL, 0);
if (n_conns == 0 || n_conns >= UINT32_MAX) {
ovs_fatal(0, "n_conns must be between 1 and 2^32");
}
n_zones = strtoul(ctx->argv[2], NULL, 0);
if (n_zones == 0 || n_zones >= UINT16_MAX) {
ovs_fatal(0, "n_zones must be between 1 and 2^16");
}
iterations = strtoul(ctx->argv[3], NULL, 0);
if (iterations == 0) {
ovs_fatal(0, "iterations must be greater than 0");
}
ct = conntrack_init();
/* Create initial connection entries */
start = time_msec();
struct dp_packet_batch **pkt_batch = xzalloc(n_conns * sizeof *pkt_batch);
for (i = 0; i < n_conns; i++) {
pkt_batch[i] = xzalloc(sizeof(struct dp_packet_batch));
dp_packet_batch_init(pkt_batch[i]);
uint16_t udp_src = (i & 0xFFFF0000) >> 16;
if (udp_src == 0) {
udp_src = UINT16_MAX;
}
uint16_t udp_dst = i & 0xFFFF;
if (udp_dst == 0) {
udp_dst = UINT16_MAX;
}
struct dp_packet *pkt = build_packet(udp_src, udp_dst, &dl_type);
dp_packet_batch_add(pkt_batch[i], pkt);
}
printf("initial packet generation time: %lld ms\n", time_msec() - start);
/* Put initial entries to each zone */
start = time_msec();
for (i = 0; i < n_zones; i++) {
for (j = 0; j < n_conns; j++) {
conntrack_execute(ct, pkt_batch[j], dl_type, false, true, i,
NULL, NULL, NULL, NULL, now, 0);
pkt_metadata_init_conn(&pkt_batch[j]->packets[0]->md);
}
}
printf("initial insert time: %lld ms\n", time_msec() - start);
/* Actually run the tests */
stopwatch_create(STOPWATCH_CT_EXECUTE_COMMIT, SW_US);
stopwatch_create(STOPWATCH_CT_EXECUTE_NO_COMMIT, SW_US);
stopwatch_create(STOPWATCH_FLUSH_FULL_ZONE, SW_US);
stopwatch_create(STOPWATCH_FLUSH_EMPTY_ZONE, SW_US);
start = time_msec();
for (i = 0; i < iterations; i++) {
/* Testing flushing a full zone */
stopwatch_start(STOPWATCH_FLUSH_FULL_ZONE, time_usec());
uint16_t zone = 1;
conntrack_flush(ct, &zone);
stopwatch_stop(STOPWATCH_FLUSH_FULL_ZONE, time_usec());
/* Now fill the zone again */
stopwatch_start(STOPWATCH_CT_EXECUTE_COMMIT, time_usec());
for (j = 0; j < n_conns; j++) {
conntrack_execute(ct, pkt_batch[j], dl_type, false, true, zone,
NULL, NULL, NULL, NULL, now, 0);
pkt_metadata_init_conn(&pkt_batch[j]->packets[0]->md);
}
stopwatch_stop(STOPWATCH_CT_EXECUTE_COMMIT, time_usec());
/* Running conntrack_execute on the now existing connections */
stopwatch_start(STOPWATCH_CT_EXECUTE_NO_COMMIT, time_usec());
for (j = 0; j < n_conns; j++) {
conntrack_execute(ct, pkt_batch[j], dl_type, false, false, zone,
NULL, NULL, NULL, NULL, now, 0);
pkt_metadata_init_conn(&pkt_batch[j]->packets[0]->md);
}
stopwatch_stop(STOPWATCH_CT_EXECUTE_NO_COMMIT, time_usec());
/* Testing flushing an empty zone */
stopwatch_start(STOPWATCH_FLUSH_EMPTY_ZONE, time_usec());
zone = UINT16_MAX;
conntrack_flush(ct, &zone);
stopwatch_stop(STOPWATCH_FLUSH_EMPTY_ZONE, time_usec());
}
printf("flush run time: %lld ms\n", time_msec() - start);
stopwatch_sync();
struct stopwatch_stats stats_ct_execute_commit = { .unit = SW_US };
stopwatch_get_stats(STOPWATCH_CT_EXECUTE_COMMIT, &stats_ct_execute_commit);
struct stopwatch_stats stats_ct_execute_nocommit = { .unit = SW_US };
stopwatch_get_stats(STOPWATCH_CT_EXECUTE_NO_COMMIT,
&stats_ct_execute_nocommit);
struct stopwatch_stats stats_flush_full = { .unit = SW_US };
stopwatch_get_stats(STOPWATCH_FLUSH_FULL_ZONE, &stats_flush_full);
struct stopwatch_stats stats_flush_empty = { .unit = SW_US };
stopwatch_get_stats(STOPWATCH_FLUSH_EMPTY_ZONE, &stats_flush_empty);
printf("results:\n");
printf(" | ct execute (commit) | ct execute (no commit) |"
" flush full zone | flush empty zone |\n");
printf("+--------+---------------------+------------------------+"
"-----------------+------------------+\n");
printf("| Min | %16llu us | %19llu us | %12llu us | %13llu us |\n",
stats_ct_execute_commit.min, stats_ct_execute_nocommit.min,
stats_flush_full.min, stats_flush_empty.min);
printf("| Max | %16llu us | %19llu us | %12llu us | %13llu us |\n",
stats_ct_execute_commit.max, stats_ct_execute_nocommit.max,
stats_flush_full.max, stats_flush_empty.max);
printf("| 95%%ile | %16.2f us | %19.2f us | %12.2f us | %13.2f us |\n",
stats_ct_execute_commit.pctl_95, stats_ct_execute_nocommit.pctl_95,
stats_flush_full.pctl_95, stats_flush_empty.pctl_95);
printf("| Avg | %16.2f us | %19.2f us | %12.2f us | %13.2f us |\n",
stats_ct_execute_commit.ewma_1, stats_ct_execute_nocommit.ewma_1,
stats_flush_full.ewma_1, stats_flush_empty.ewma_1);
conntrack_destroy(ct);
for (i = 0; i < n_conns; i++) {
dp_packet_delete_batch(pkt_batch[i], true);
free(pkt_batch[i]);
}
free(pkt_batch);
}
static void
pcap_batch_execute_conntrack(struct conntrack *ct_,
struct dp_packet_batch *pkt_batch)
@ -264,6 +410,11 @@ static const struct ovs_cmdl_command commands[] = {
* 'batch_size' (1 by default) per call, with the commit flag set.
* Prints the ct_state of each packet. */
{"pcap", "file [batch_size]", 1, 2, test_pcap, OVS_RO},
/* Creates 'n_conns' connections in 'n_zones' zones each.
* Afterwards triggers flush requests repeadeatly for the last filled zone
* and an empty zone. */
{"benchmark-zones", "n_conns n_zones iterations", 3, 3,
test_benchmark_zones, OVS_RO},
{NULL, NULL, 0, 0, NULL, OVS_RO},
};