Merge branch 'backoff' of github.com:dgquintas/grpc into fixit23
diff --git a/doc/connection-backoff.md b/doc/connection-backoff.md
index 251a60f..0e83d9b 100644
--- a/doc/connection-backoff.md
+++ b/doc/connection-backoff.md
@@ -7,9 +7,10 @@
We have several parameters:
1. INITIAL_BACKOFF (how long to wait after the first failure before retrying)
- 2. MULTIPLIER (factor with which to multiply backoff after a failed retry)
- 3. MAX_BACKOFF (upper bound on backoff)
- 4. MIN_CONNECT_TIMEOUT (minimum time we're willing to give a connection to
+ 1. MULTIPLIER (factor with which to multiply backoff after a failed retry)
+ 1. JITTER (by how much to randomize backoffs).
+ 1. MAX_BACKOFF (upper bound on backoff)
+ 1. MIN_CONNECT_TIMEOUT (minimum time we're willing to give a connection to
complete)
## Proposed Backoff Algorithm
diff --git a/src/core/ext/client_channel/subchannel.c b/src/core/ext/client_channel/subchannel.c
index 46c0112..0863207 100644
--- a/src/core/ext/client_channel/subchannel.c
+++ b/src/core/ext/client_channel/subchannel.c
@@ -336,16 +336,18 @@
int initial_backoff_ms =
GRPC_SUBCHANNEL_INITIAL_CONNECT_BACKOFF_SECONDS * 1000;
int max_backoff_ms = GRPC_SUBCHANNEL_RECONNECT_MAX_BACKOFF_SECONDS * 1000;
+ int min_backoff_ms = GRPC_SUBCHANNEL_MIN_CONNECT_TIMEOUT_SECONDS * 1000;
bool fixed_reconnect_backoff = false;
if (c->args) {
for (size_t i = 0; i < c->args->num_args; i++) {
if (0 == strcmp(c->args->args[i].key,
- "grpc.testing.fixed_reconnect_backoff")) {
+ "grpc.testing.fixed_reconnect_backoff_ms")) {
GPR_ASSERT(c->args->args[i].type == GRPC_ARG_INTEGER);
fixed_reconnect_backoff = true;
- initial_backoff_ms = max_backoff_ms = grpc_channel_arg_get_integer(
- &c->args->args[i],
- (grpc_integer_options){initial_backoff_ms, 100, INT_MAX});
+ initial_backoff_ms = min_backoff_ms = max_backoff_ms =
+ grpc_channel_arg_get_integer(
+ &c->args->args[i],
+ (grpc_integer_options){initial_backoff_ms, 100, INT_MAX});
} else if (0 == strcmp(c->args->args[i].key,
GRPC_ARG_MAX_RECONNECT_BACKOFF_MS)) {
fixed_reconnect_backoff = false;
@@ -362,11 +364,11 @@
}
}
gpr_backoff_init(
- &c->backoff_state,
+ &c->backoff_state, initial_backoff_ms,
fixed_reconnect_backoff ? 1.0
: GRPC_SUBCHANNEL_RECONNECT_BACKOFF_MULTIPLIER,
fixed_reconnect_backoff ? 0.0 : GRPC_SUBCHANNEL_RECONNECT_JITTER,
- initial_backoff_ms, max_backoff_ms);
+ min_backoff_ms, max_backoff_ms);
gpr_mu_init(&c->mu);
return grpc_subchannel_index_register(exec_ctx, key, c);
diff --git a/src/core/ext/lb_policy/grpclb/grpclb.c b/src/core/ext/lb_policy/grpclb/grpclb.c
index 4262d2b..df0db61 100644
--- a/src/core/ext/lb_policy/grpclb/grpclb.c
+++ b/src/core/ext/lb_policy/grpclb/grpclb.c
@@ -123,10 +123,11 @@
#include "src/core/lib/surface/channel.h"
#include "src/core/lib/transport/static_metadata.h"
-#define BACKOFF_MULTIPLIER 1.6
-#define BACKOFF_JITTER 0.2
-#define BACKOFF_MIN_SECONDS 10
-#define BACKOFF_MAX_SECONDS 60
+#define GRPC_GRPCLB_MIN_CONNECT_TIMEOUT_SECONDS 20
+#define GRPC_GRPCLB_INITIAL_CONNECT_BACKOFF_SECONDS 1
+#define GRPC_GRPCLB_RECONNECT_BACKOFF_MULTIPLIER 1.6
+#define GRPC_GRPCLB_RECONNECT_MAX_BACKOFF_SECONDS 120
+#define GRPC_GRPCLB_RECONNECT_JITTER 0.2
int grpc_lb_glb_trace = 0;
@@ -1107,9 +1108,12 @@
grpc_closure_init(&glb_policy->lb_on_response_received,
lb_on_response_received, glb_policy);
- gpr_backoff_init(&glb_policy->lb_call_backoff_state, BACKOFF_MULTIPLIER,
- BACKOFF_JITTER, BACKOFF_MIN_SECONDS * 1000,
- BACKOFF_MAX_SECONDS * 1000);
+ gpr_backoff_init(&glb_policy->lb_call_backoff_state,
+ GRPC_GRPCLB_INITIAL_CONNECT_BACKOFF_SECONDS,
+ GRPC_GRPCLB_RECONNECT_BACKOFF_MULTIPLIER,
+ GRPC_GRPCLB_RECONNECT_JITTER,
+ GRPC_GRPCLB_MIN_CONNECT_TIMEOUT_SECONDS * 1000,
+ GRPC_GRPCLB_RECONNECT_MAX_BACKOFF_SECONDS * 1000);
}
static void lb_call_destroy_locked(glb_lb_policy *glb_policy) {
diff --git a/src/core/ext/resolver/dns/native/dns_resolver.c b/src/core/ext/resolver/dns/native/dns_resolver.c
index 665439f..15476f5 100644
--- a/src/core/ext/resolver/dns/native/dns_resolver.c
+++ b/src/core/ext/resolver/dns/native/dns_resolver.c
@@ -46,10 +46,11 @@
#include "src/core/lib/support/backoff.h"
#include "src/core/lib/support/string.h"
-#define BACKOFF_MULTIPLIER 1.6
-#define BACKOFF_JITTER 0.2
-#define BACKOFF_MIN_SECONDS 1
-#define BACKOFF_MAX_SECONDS 120
+#define GRPC_DNS_MIN_CONNECT_TIMEOUT_SECONDS 1
+#define GRPC_DNS_INITIAL_CONNECT_BACKOFF_SECONDS 1
+#define GRPC_DNS_RECONNECT_BACKOFF_MULTIPLIER 1.6
+#define GRPC_DNS_RECONNECT_MAX_BACKOFF_SECONDS 120
+#define GRPC_DNS_RECONNECT_JITTER 0.2
typedef struct {
/** base class: must be first */
@@ -269,8 +270,11 @@
server_name_arg.value.string = (char *)path;
r->channel_args =
grpc_channel_args_copy_and_add(args->args, &server_name_arg, 1);
- gpr_backoff_init(&r->backoff_state, BACKOFF_MULTIPLIER, BACKOFF_JITTER,
- BACKOFF_MIN_SECONDS * 1000, BACKOFF_MAX_SECONDS * 1000);
+ gpr_backoff_init(&r->backoff_state, GRPC_DNS_INITIAL_CONNECT_BACKOFF_SECONDS,
+ GRPC_DNS_RECONNECT_BACKOFF_MULTIPLIER,
+ GRPC_DNS_RECONNECT_JITTER,
+ GRPC_DNS_MIN_CONNECT_TIMEOUT_SECONDS * 1000,
+ GRPC_DNS_RECONNECT_MAX_BACKOFF_SECONDS * 1000);
return &r->base;
}
diff --git a/src/core/lib/support/backoff.c b/src/core/lib/support/backoff.c
index e89ef47..0612472 100644
--- a/src/core/lib/support/backoff.c
+++ b/src/core/lib/support/backoff.c
@@ -35,8 +35,10 @@
#include <grpc/support/useful.h>
-void gpr_backoff_init(gpr_backoff *backoff, double multiplier, double jitter,
+void gpr_backoff_init(gpr_backoff *backoff, int64_t initial_connect_timeout,
+ double multiplier, double jitter,
int64_t min_timeout_millis, int64_t max_timeout_millis) {
+ backoff->initial_connect_timeout = initial_connect_timeout;
backoff->multiplier = multiplier;
backoff->jitter = jitter;
backoff->min_timeout_millis = min_timeout_millis;
@@ -45,9 +47,10 @@
}
gpr_timespec gpr_backoff_begin(gpr_backoff *backoff, gpr_timespec now) {
- backoff->current_timeout_millis = backoff->min_timeout_millis;
- return gpr_time_add(
- now, gpr_time_from_millis(backoff->current_timeout_millis, GPR_TIMESPAN));
+ backoff->current_timeout_millis = backoff->initial_connect_timeout;
+ const int64_t first_timeout =
+ GPR_MAX(backoff->current_timeout_millis, backoff->min_timeout_millis);
+ return gpr_time_add(now, gpr_time_from_millis(first_timeout, GPR_TIMESPAN));
}
/* Generate a random number between 0 and 1. */
@@ -57,20 +60,28 @@
}
gpr_timespec gpr_backoff_step(gpr_backoff *backoff, gpr_timespec now) {
- double new_timeout_millis =
+ const double new_timeout_millis =
backoff->multiplier * (double)backoff->current_timeout_millis;
- double jitter_range = backoff->jitter * new_timeout_millis;
- double jitter =
- (2 * generate_uniform_random_number(&backoff->rng_state) - 1) *
- jitter_range;
backoff->current_timeout_millis =
- GPR_CLAMP((int64_t)(new_timeout_millis + jitter),
- backoff->min_timeout_millis, backoff->max_timeout_millis);
- return gpr_time_add(
+ GPR_MIN((int64_t)new_timeout_millis, backoff->max_timeout_millis);
+
+ const double jitter_range_width = backoff->jitter * new_timeout_millis;
+ const double jitter =
+ (2 * generate_uniform_random_number(&backoff->rng_state) - 1) *
+ jitter_range_width;
+
+ backoff->current_timeout_millis =
+ (int64_t)((double)(backoff->current_timeout_millis) + jitter);
+
+ const gpr_timespec current_deadline = gpr_time_add(
now, gpr_time_from_millis(backoff->current_timeout_millis, GPR_TIMESPAN));
+
+ const gpr_timespec min_deadline = gpr_time_add(
+ now, gpr_time_from_millis(backoff->min_timeout_millis, GPR_TIMESPAN));
+
+ return gpr_time_max(current_deadline, min_deadline);
}
void gpr_backoff_reset(gpr_backoff *backoff) {
- // forces step() to return a timeout of min_timeout_millis
- backoff->current_timeout_millis = 0;
+ backoff->current_timeout_millis = backoff->initial_connect_timeout;
}
diff --git a/src/core/lib/support/backoff.h b/src/core/lib/support/backoff.h
index 6d40c15..5e9b740 100644
--- a/src/core/lib/support/backoff.h
+++ b/src/core/lib/support/backoff.h
@@ -37,7 +37,9 @@
#include <grpc/support/time.h>
typedef struct {
- /// const: multiplier between retry attempts
+ /// const: how long to wait after the first failure before retrying
+ int64_t initial_connect_timeout;
+ /// const: factor with which to multiply backoff after a failed retry
double multiplier;
/// const: amount to randomize backoffs
double jitter;
@@ -54,7 +56,8 @@
} gpr_backoff;
/// Initialize backoff machinery - does not need to be destroyed
-void gpr_backoff_init(gpr_backoff *backoff, double multiplier, double jitter,
+void gpr_backoff_init(gpr_backoff *backoff, int64_t initial_connect_timeout,
+ double multiplier, double jitter,
int64_t min_timeout_millis, int64_t max_timeout_millis);
/// Begin retry loop: returns a timespec for the NEXT retry
diff --git a/test/core/client_channel/lb_policies_test.c b/test/core/client_channel/lb_policies_test.c
index 51df52c..6e4058f 100644
--- a/test/core/client_channel/lb_policies_test.c
+++ b/test/core/client_channel/lb_policies_test.c
@@ -483,7 +483,7 @@
gpr_asprintf(&client_hostport, "ipv4:%s", servers_hostports_str);
arg_array[0].type = GRPC_ARG_INTEGER;
- arg_array[0].key = "grpc.testing.fixed_reconnect_backoff";
+ arg_array[0].key = "grpc.testing.fixed_reconnect_backoff_ms";
arg_array[0].value.integer = RETRY_TIMEOUT;
arg_array[1].type = GRPC_ARG_STRING;
arg_array[1].key = GRPC_ARG_LB_POLICY_NAME;
@@ -521,7 +521,7 @@
gpr_asprintf(&client_hostport, "ipv4:%s", servers_hostports_str);
arg_array[0].type = GRPC_ARG_INTEGER;
- arg_array[0].key = "grpc.testing.fixed_reconnect_backoff";
+ arg_array[0].key = "grpc.testing.fixed_reconnect_backoff_ms";
arg_array[0].value.integer = RETRY_TIMEOUT;
arg_array[1].type = GRPC_ARG_STRING;
arg_array[1].key = GRPC_ARG_LB_POLICY_NAME;
diff --git a/test/core/end2end/goaway_server_test.c b/test/core/end2end/goaway_server_test.c
index a8c7b2b..cd68b39 100644
--- a/test/core/end2end/goaway_server_test.c
+++ b/test/core/end2end/goaway_server_test.c
@@ -126,8 +126,16 @@
char *addr;
+ grpc_channel_args client_args;
+ grpc_arg arg_array[1];
+ arg_array[0].type = GRPC_ARG_INTEGER;
+ arg_array[0].key = "grpc.testing.fixed_reconnect_backoff_ms";
+ arg_array[0].value.integer = 1000;
+ client_args.args = arg_array;
+ client_args.num_args = 1;
+
/* create a channel that picks first amongst the servers */
- grpc_channel *chan = grpc_insecure_channel_create("test", NULL, NULL);
+ grpc_channel *chan = grpc_insecure_channel_create("test", &client_args, NULL);
/* and an initial call to them */
grpc_call *call1 = grpc_channel_create_call(
chan, NULL, GRPC_PROPAGATE_DEFAULTS, cq, "/foo", "127.0.0.1",
diff --git a/test/core/end2end/tests/connectivity.c b/test/core/end2end/tests/connectivity.c
index 260297e..42475c7 100644
--- a/test/core/end2end/tests/connectivity.c
+++ b/test/core/end2end/tests/connectivity.c
@@ -68,7 +68,15 @@
gpr_thd_options thdopt = gpr_thd_options_default();
gpr_thd_id thdid;
- config.init_client(&f, NULL);
+ grpc_channel_args client_args;
+ grpc_arg arg_array[1];
+ arg_array[0].type = GRPC_ARG_INTEGER;
+ arg_array[0].key = "grpc.testing.fixed_reconnect_backoff_ms";
+ arg_array[0].value.integer = 1000;
+ client_args.args = arg_array;
+ client_args.num_args = 1;
+
+ config.init_client(&f, &client_args);
ce.channel = f.client;
ce.cq = f.cq;
diff --git a/test/core/end2end/tests/simple_delayed_request.c b/test/core/end2end/tests/simple_delayed_request.c
index ec40c8f..414a03d 100644
--- a/test/core/end2end/tests/simple_delayed_request.c
+++ b/test/core/end2end/tests/simple_delayed_request.c
@@ -200,21 +200,36 @@
static void test_simple_delayed_request_short(grpc_end2end_test_config config) {
grpc_end2end_test_fixture f;
+ grpc_channel_args client_args;
+ grpc_arg arg_array[1];
+ arg_array[0].type = GRPC_ARG_INTEGER;
+ arg_array[0].key = "grpc.testing.fixed_reconnect_backoff_ms";
+ arg_array[0].value.integer = 1000;
+ client_args.args = arg_array;
+ client_args.num_args = 1;
gpr_log(GPR_INFO, "%s/%s", "test_simple_delayed_request_short", config.name);
f = config.create_fixture(NULL, NULL);
- simple_delayed_request_body(config, &f, NULL, NULL, 100000);
+
+ simple_delayed_request_body(config, &f, &client_args, NULL, 100000);
end_test(&f);
config.tear_down_data(&f);
}
static void test_simple_delayed_request_long(grpc_end2end_test_config config) {
grpc_end2end_test_fixture f;
+ grpc_channel_args client_args;
+ grpc_arg arg_array[1];
+ arg_array[0].type = GRPC_ARG_INTEGER;
+ arg_array[0].key = "grpc.testing.fixed_reconnect_backoff_ms";
+ arg_array[0].value.integer = 1000;
+ client_args.args = arg_array;
+ client_args.num_args = 1;
gpr_log(GPR_INFO, "%s/%s", "test_simple_delayed_request_long", config.name);
f = config.create_fixture(NULL, NULL);
/* This timeout should be longer than a single retry */
- simple_delayed_request_body(config, &f, NULL, NULL, 1500000);
+ simple_delayed_request_body(config, &f, &client_args, NULL, 1500000);
end_test(&f);
config.tear_down_data(&f);
}
diff --git a/test/core/support/backoff_test.c b/test/core/support/backoff_test.c
index 13cba7d..ad6e5a9 100644
--- a/test/core/support/backoff_test.c
+++ b/test/core/support/backoff_test.c
@@ -39,61 +39,110 @@
static void test_constant_backoff(void) {
gpr_backoff backoff;
- gpr_backoff_init(&backoff, 1.0, 0.0, 1000, 1000);
+ gpr_backoff_init(&backoff, 200 /* initial timeout */, 1.0 /* multiplier */,
+ 0.0 /* jitter */, 100 /* min timeout */,
+ 1000 /* max timeout */);
gpr_timespec now = gpr_time_0(GPR_TIMESPAN);
gpr_timespec next = gpr_backoff_begin(&backoff, now);
- GPR_ASSERT(gpr_time_to_millis(gpr_time_sub(next, now)) == 1000);
+ GPR_ASSERT(gpr_time_to_millis(gpr_time_sub(next, now)) == 200);
for (int i = 0; i < 10000; i++) {
next = gpr_backoff_step(&backoff, now);
- GPR_ASSERT(gpr_time_to_millis(gpr_time_sub(next, now)) == 1000);
+ GPR_ASSERT(gpr_time_to_millis(gpr_time_sub(next, now)) == 200);
now = next;
}
}
-static void test_no_jitter_backoff(void) {
+static void test_min_connect(void) {
gpr_backoff backoff;
- gpr_backoff_init(&backoff, 2.0, 0.0, 1, 513);
+ gpr_backoff_init(&backoff, 100 /* initial timeout */, 1.0 /* multiplier */,
+ 0.0 /* jitter */, 200 /* min timeout */,
+ 1000 /* max timeout */);
gpr_timespec now = gpr_time_0(GPR_TIMESPAN);
gpr_timespec next = gpr_backoff_begin(&backoff, now);
- GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(1, GPR_TIMESPAN), next) == 0);
+ GPR_ASSERT(gpr_time_to_millis(gpr_time_sub(next, now)) == 200);
+}
+
+static void test_no_jitter_backoff(void) {
+ gpr_backoff backoff;
+ gpr_backoff_init(&backoff, 2 /* initial timeout */, 2.0 /* multiplier */,
+ 0.0 /* jitter */, 1 /* min timeout */,
+ 513 /* max timeout */);
+ // x_1 = 2
+ // x_n = 2**i + x_{i-1} ( = 2**(n+1) - 2 )
+ gpr_timespec now = gpr_time_0(GPR_TIMESPAN);
+ gpr_timespec next = gpr_backoff_begin(&backoff, now);
+ GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(2, GPR_TIMESPAN), next) == 0);
now = next;
next = gpr_backoff_step(&backoff, now);
- GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(3, GPR_TIMESPAN), next) == 0);
+ GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(6, GPR_TIMESPAN), next) == 0);
now = next;
next = gpr_backoff_step(&backoff, now);
- GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(7, GPR_TIMESPAN), next) == 0);
+ GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(14, GPR_TIMESPAN), next) == 0);
now = next;
next = gpr_backoff_step(&backoff, now);
- GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(15, GPR_TIMESPAN), next) == 0);
+ GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(30, GPR_TIMESPAN), next) == 0);
now = next;
next = gpr_backoff_step(&backoff, now);
- GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(31, GPR_TIMESPAN), next) == 0);
+ GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(62, GPR_TIMESPAN), next) == 0);
now = next;
next = gpr_backoff_step(&backoff, now);
- GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(63, GPR_TIMESPAN), next) == 0);
+ GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(126, GPR_TIMESPAN), next) == 0);
now = next;
next = gpr_backoff_step(&backoff, now);
- GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(127, GPR_TIMESPAN), next) == 0);
+ GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(254, GPR_TIMESPAN), next) == 0);
now = next;
next = gpr_backoff_step(&backoff, now);
- GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(255, GPR_TIMESPAN), next) == 0);
+ GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(510, GPR_TIMESPAN), next) == 0);
now = next;
next = gpr_backoff_step(&backoff, now);
- GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(511, GPR_TIMESPAN), next) == 0);
+ GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(1022, GPR_TIMESPAN), next) == 0);
now = next;
next = gpr_backoff_step(&backoff, now);
- GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(1023, GPR_TIMESPAN), next) == 0);
+ // Hit the maximum timeout. From this point onwards, retries will increase
+ // only by max timeout.
+ GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(1535, GPR_TIMESPAN), next) == 0);
now = next;
next = gpr_backoff_step(&backoff, now);
- GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(1536, GPR_TIMESPAN), next) == 0);
+ GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(2048, GPR_TIMESPAN), next) == 0);
now = next;
next = gpr_backoff_step(&backoff, now);
- GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(2049, GPR_TIMESPAN), next) == 0);
- now = next;
- next = gpr_backoff_step(&backoff, now);
- GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(2562, GPR_TIMESPAN), next) == 0);
+ GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(2561, GPR_TIMESPAN), next) == 0);
+}
+
+static void test_jitter_backoff(void) {
+ const int64_t initial_timeout = 500;
+ const double jitter = 0.1;
+ gpr_backoff backoff;
+ gpr_backoff_init(&backoff, initial_timeout, 1.0 /* multiplier */, jitter,
+ 100 /* min timeout */, 1000 /* max timeout */);
+
+ backoff.rng_state = 0; // force consistent PRNG
+
+ gpr_timespec now = gpr_time_0(GPR_TIMESPAN);
+ gpr_timespec next = gpr_backoff_begin(&backoff, now);
+ GPR_ASSERT(gpr_time_to_millis(gpr_time_sub(next, now)) == 500);
+
+ int64_t expected_next_lower_bound =
+ (int64_t)((double)initial_timeout * (1 - jitter));
+ int64_t expected_next_upper_bound =
+ (int64_t)((double)initial_timeout * (1 + jitter));
+
+ for (int i = 0; i < 10000; i++) {
+ next = gpr_backoff_step(&backoff, now);
+
+ // next-now must be within (jitter*100)% of the previous timeout.
+ const int64_t timeout_millis = gpr_time_to_millis(gpr_time_sub(next, now));
+ GPR_ASSERT(timeout_millis >= expected_next_lower_bound);
+ GPR_ASSERT(timeout_millis <= expected_next_upper_bound);
+
+ expected_next_lower_bound =
+ (int64_t)((double)timeout_millis * (1 - jitter));
+ expected_next_upper_bound =
+ (int64_t)((double)timeout_millis * (1 + jitter));
+ now = next;
+ }
}
int main(int argc, char **argv) {
@@ -101,7 +150,9 @@
gpr_time_init();
test_constant_backoff();
+ test_min_connect();
test_no_jitter_backoff();
+ test_jitter_backoff();
return 0;
}