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/*
*
* Copyright 2016 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include "src/core/lib/transport/bdp_estimator.h"
#include <grpc/grpc.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/string_util.h>
#include <grpc/support/useful.h>
#include <limits.h>
#include "src/core/lib/iomgr/timer_manager.h"
#include "src/core/lib/support/string.h"
#include "test/core/util/test_config.h"
extern gpr_timespec (*gpr_now_impl)(gpr_clock_type clock_type);
static int g_clock = 0;
static gpr_timespec fake_gpr_now(gpr_clock_type clock_type) {
return (gpr_timespec){
.tv_sec = g_clock, .tv_nsec = 0, .clock_type = clock_type,
};
}
static void inc_time(void) { g_clock += 30; }
static void test_noop(void) {
gpr_log(GPR_INFO, "test_noop");
grpc_bdp_estimator est;
grpc_bdp_estimator_init(&est, "test");
}
static void test_get_estimate_no_samples(void) {
gpr_log(GPR_INFO, "test_get_estimate_no_samples");
grpc_bdp_estimator est;
grpc_bdp_estimator_init(&est, "test");
int64_t estimate;
grpc_bdp_estimator_get_estimate(&est, &estimate);
}
static void add_samples(grpc_bdp_estimator *estimator, int64_t *samples,
size_t n) {
grpc_bdp_estimator_add_incoming_bytes(estimator, 1234567);
inc_time();
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
GPR_ASSERT(grpc_bdp_estimator_need_ping(&exec_ctx, estimator) == true);
grpc_bdp_estimator_schedule_ping(estimator);
grpc_bdp_estimator_start_ping(estimator);
for (size_t i = 0; i < n; i++) {
grpc_bdp_estimator_add_incoming_bytes(estimator, samples[i]);
GPR_ASSERT(grpc_bdp_estimator_need_ping(&exec_ctx, estimator) == false);
}
gpr_sleep_until(gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
gpr_time_from_millis(1, GPR_TIMESPAN)));
grpc_bdp_estimator_complete_ping(&exec_ctx, estimator);
grpc_exec_ctx_finish(&exec_ctx);
}
static void add_sample(grpc_bdp_estimator *estimator, int64_t sample) {
add_samples(estimator, &sample, 1);
}
static void test_get_estimate_1_sample(void) {
gpr_log(GPR_INFO, "test_get_estimate_1_sample");
grpc_bdp_estimator est;
grpc_bdp_estimator_init(&est, "test");
add_sample(&est, 100);
int64_t estimate;
grpc_bdp_estimator_get_estimate(&est, &estimate);
}
static void test_get_estimate_2_samples(void) {
gpr_log(GPR_INFO, "test_get_estimate_2_samples");
grpc_bdp_estimator est;
grpc_bdp_estimator_init(&est, "test");
add_sample(&est, 100);
add_sample(&est, 100);
int64_t estimate;
grpc_bdp_estimator_get_estimate(&est, &estimate);
}
static int64_t get_estimate(grpc_bdp_estimator *estimator) {
int64_t out;
GPR_ASSERT(grpc_bdp_estimator_get_estimate(estimator, &out));
return out;
}
static void test_get_estimate_3_samples(void) {
gpr_log(GPR_INFO, "test_get_estimate_3_samples");
grpc_bdp_estimator est;
grpc_bdp_estimator_init(&est, "test");
add_sample(&est, 100);
add_sample(&est, 100);
add_sample(&est, 100);
int64_t estimate;
grpc_bdp_estimator_get_estimate(&est, &estimate);
}
static int64_t next_pow_2(int64_t v) {
v--;
v |= v >> 1;
v |= v >> 2;
v |= v >> 4;
v |= v >> 8;
v |= v >> 16;
v |= v >> 32;
v++;
return v;
}
static void test_get_estimate_random_values(size_t n) {
gpr_log(GPR_INFO, "test_get_estimate_random_values(%" PRIdPTR ")", n);
grpc_bdp_estimator est;
grpc_bdp_estimator_init(&est, "test");
const int kMaxSample = 65535;
int min = kMaxSample;
int max = 0;
for (size_t i = 0; i < n; i++) {
int sample = rand() % (kMaxSample + 1);
if (sample < min) min = sample;
if (sample > max) max = sample;
add_sample(&est, sample);
if (i >= 3) {
gpr_log(GPR_DEBUG, "est:%" PRId64 " min:%d max:%d", get_estimate(&est),
min, max);
GPR_ASSERT(get_estimate(&est) <= GPR_MAX(65536, 2 * next_pow_2(max)));
}
}
}
int main(int argc, char **argv) {
grpc_test_init(argc, argv);
gpr_now_impl = fake_gpr_now;
grpc_init();
grpc_timer_manager_set_threading(false);
test_noop();
test_get_estimate_no_samples();
test_get_estimate_1_sample();
test_get_estimate_2_samples();
test_get_estimate_3_samples();
for (size_t i = 3; i < 1000; i = i * 3 / 2) {
test_get_estimate_random_values(i);
}
grpc_shutdown();
return 0;
}
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