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