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Add RTT Test Vectors

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This commit is contained in:
Mike Perry 2023-06-23 14:46:28 +00:00
parent 3647b2f95a
commit 06aa454c08
1 changed files with 73 additions and 0 deletions
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73
src/test/test_congestion_control.c
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@ -88,10 +88,83 @@ test_congestion_control_clock(void *arg)
congestion_control_free(cc);
}
/* =========== RTT Test Vectors ================== */
typedef struct rtt_vec {
uint64_t sent_usec_in;
uint64_t got_sendme_usec_in;
uint64_t cwnd_in;
bool ss_in;
uint64_t curr_rtt_usec_out;
uint64_t ewma_rtt_usec_out;
uint64_t min_rtt_usec_out;
} rtt_vec_t;
static void
run_rtt_test_vec(congestion_control_t *cc,
rtt_vec_t *vec, size_t vec_len)
{
for (size_t i = 0; i < vec_len; i++) {
enqueue_timestamp(cc->sendme_pending_timestamps,
vec[i].sent_usec_in);
}
for (size_t i = 0; i < vec_len; i++) {
cc->cwnd = vec[i].cwnd_in;
cc->in_slow_start = vec[i].ss_in;
uint64_t curr_rtt_usec = congestion_control_update_circuit_rtt(cc,
vec[i].got_sendme_usec_in);
tt_int_op(curr_rtt_usec, OP_EQ, vec[i].curr_rtt_usec_out);
tt_int_op(cc->min_rtt_usec, OP_EQ, vec[i].min_rtt_usec_out);
tt_int_op(cc->ewma_rtt_usec, OP_EQ, vec[i].ewma_rtt_usec_out);
}
done:
is_monotime_clock_broken = false;
}
/**
* This test validates current, EWMA, and minRTT calculation
* from Sections 2.1 of Prop#324.
*
* We also do NOT exercise the sendme pacing code here. See
* test_sendme_is_next() for that, in test_sendme.c.
*/
void
test_congestion_control_rtt(void *arg)
{
(void)arg;
rtt_vec_t vect1[] = {
{100000, 200000, 124, 1, 100000, 100000, 100000},
{200000, 300000, 124, 1, 100000, 100000, 100000},
{350000, 500000, 124, 1, 150000, 133333, 100000},
{500000, 550000, 124, 1, 50000, 77777, 77777},
{600000, 700000, 124, 1, 100000, 92592, 77777},
{700000, 750000, 124, 1, 50000, 64197, 64197},
{750000, 875000, 124, 0, 125000, 104732, 104732},
{875000, 900000, 124, 0, 25000, 51577, 104732},
{900000, 950000, 200, 0, 50000, 50525, 50525}
};
circuit_params_t params;
congestion_control_t *cc = NULL;
params.cc_enabled = 1;
params.sendme_inc_cells = TLS_RECORD_MAX_CELLS;
cc_alg = CC_ALG_VEGAS;
cc = congestion_control_new(&params, CC_PATH_EXIT);
run_rtt_test_vec(cc, vect1, sizeof(vect1)/sizeof(rtt_vec_t));
congestion_control_free(cc);
return;
}
#define TEST_CONGESTION_CONTROL(name, flags) \
{ #name, test_##name, (flags), NULL, NULL }
struct testcase_t congestion_control_tests[] = {
TEST_CONGESTION_CONTROL(congestion_control_clock, TT_FORK),
TEST_CONGESTION_CONTROL(congestion_control_rtt, TT_FORK),
END_OF_TESTCASES
};