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tci-gateway-module
Grpc
Commits
536fc539
Commit
536fc539
authored
9 years ago
by
Craig Tiller
Browse files
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Integrate backoff library with subchannel
parent
c72cc422
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Changes
1
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1 changed file
src/core/client_config/subchannel.c
+31
-71
31 additions, 71 deletions
src/core/client_config/subchannel.c
with
31 additions
and
71 deletions
src/core/client_config/subchannel.c
+
31
−
71
View file @
536fc539
...
@@ -45,6 +45,7 @@
...
@@ -45,6 +45,7 @@
#include
"src/core/client_config/subchannel_index.h"
#include
"src/core/client_config/subchannel_index.h"
#include
"src/core/iomgr/timer.h"
#include
"src/core/iomgr/timer.h"
#include
"src/core/profiling/timers.h"
#include
"src/core/profiling/timers.h"
#include
"src/core/support/backoff.h"
#include
"src/core/surface/channel.h"
#include
"src/core/surface/channel.h"
#include
"src/core/transport/connectivity_state.h"
#include
"src/core/transport/connectivity_state.h"
...
@@ -127,8 +128,8 @@ struct grpc_subchannel {
...
@@ -127,8 +128,8 @@ struct grpc_subchannel {
/** next connect attempt time */
/** next connect attempt time */
gpr_timespec
next_attempt
;
gpr_timespec
next_attempt
;
/**
amount to backoff each failur
e */
/**
backoff stat
e */
gpr_
timespec
backoff_
delta
;
gpr_
backoff
backoff_
state
;
/** do we have an active alarm? */
/** do we have an active alarm? */
int
have_alarm
;
int
have_alarm
;
/** our alarm */
/** our alarm */
...
@@ -146,7 +147,6 @@ struct grpc_subchannel_call {
...
@@ -146,7 +147,6 @@ struct grpc_subchannel_call {
#define CALLSTACK_TO_SUBCHANNEL_CALL(callstack) \
#define CALLSTACK_TO_SUBCHANNEL_CALL(callstack) \
(((grpc_subchannel_call *)(callstack)) - 1)
(((grpc_subchannel_call *)(callstack)) - 1)
static
gpr_timespec
compute_connect_deadline
(
grpc_subchannel
*
c
);
static
void
subchannel_connected
(
grpc_exec_ctx
*
exec_ctx
,
void
*
subchannel
,
static
void
subchannel_connected
(
grpc_exec_ctx
*
exec_ctx
,
void
*
subchannel
,
bool
iomgr_success
);
bool
iomgr_success
);
...
@@ -184,8 +184,8 @@ static void connection_destroy(grpc_exec_ctx *exec_ctx, void *arg,
...
@@ -184,8 +184,8 @@ static void connection_destroy(grpc_exec_ctx *exec_ctx, void *arg,
gpr_free
(
c
);
gpr_free
(
c
);
}
}
void
grpc_connected_subchannel_ref
(
grpc_connected_subchannel
*
c
void
grpc_connected_subchannel_ref
(
GRPC_SUBCHANNEL_REF_EXTRA_ARGS
)
{
grpc_connected_subchannel
*
c
GRPC_SUBCHANNEL_REF_EXTRA_ARGS
)
{
GRPC_CHANNEL_STACK_REF
(
CHANNEL_STACK_FROM_CONNECTION
(
c
),
REF_REASON
);
GRPC_CHANNEL_STACK_REF
(
CHANNEL_STACK_FROM_CONNECTION
(
c
),
REF_REASON
);
}
}
...
@@ -226,8 +226,8 @@ static gpr_atm ref_mutate(grpc_subchannel *c, gpr_atm delta,
...
@@ -226,8 +226,8 @@ static gpr_atm ref_mutate(grpc_subchannel *c, gpr_atm delta,
return
old_val
;
return
old_val
;
}
}
grpc_subchannel
*
grpc_subchannel_ref
(
grpc_subchannel
*
c
grpc_subchannel
*
grpc_subchannel_ref
(
GRPC_SUBCHANNEL_REF_EXTRA_ARGS
)
{
grpc_subchannel
*
c
GRPC_SUBCHANNEL_REF_EXTRA_ARGS
)
{
gpr_atm
old_refs
;
gpr_atm
old_refs
;
old_refs
=
ref_mutate
(
c
,
(
1
<<
INTERNAL_REF_BITS
),
old_refs
=
ref_mutate
(
c
,
(
1
<<
INTERNAL_REF_BITS
),
0
REF_MUTATE_PURPOSE
(
"STRONG_REF"
));
0
REF_MUTATE_PURPOSE
(
"STRONG_REF"
));
...
@@ -235,8 +235,8 @@ grpc_subchannel *grpc_subchannel_ref(grpc_subchannel *c
...
@@ -235,8 +235,8 @@ grpc_subchannel *grpc_subchannel_ref(grpc_subchannel *c
return
c
;
return
c
;
}
}
grpc_subchannel
*
grpc_subchannel_weak_ref
(
grpc_subchannel
*
c
grpc_subchannel
*
grpc_subchannel_weak_ref
(
GRPC_SUBCHANNEL_REF_EXTRA_ARGS
)
{
grpc_subchannel
*
c
GRPC_SUBCHANNEL_REF_EXTRA_ARGS
)
{
gpr_atm
old_refs
;
gpr_atm
old_refs
;
old_refs
=
ref_mutate
(
c
,
1
,
0
REF_MUTATE_PURPOSE
(
"WEAK_REF"
));
old_refs
=
ref_mutate
(
c
,
1
,
0
REF_MUTATE_PURPOSE
(
"WEAK_REF"
));
GPR_ASSERT
(
old_refs
!=
0
);
GPR_ASSERT
(
old_refs
!=
0
);
...
@@ -337,6 +337,22 @@ grpc_subchannel *grpc_subchannel_create(grpc_exec_ctx *exec_ctx,
...
@@ -337,6 +337,22 @@ grpc_subchannel *grpc_subchannel_create(grpc_exec_ctx *exec_ctx,
grpc_closure_init
(
&
c
->
connected
,
subchannel_connected
,
c
);
grpc_closure_init
(
&
c
->
connected
,
subchannel_connected
,
c
);
grpc_connectivity_state_init
(
&
c
->
state_tracker
,
GRPC_CHANNEL_IDLE
,
grpc_connectivity_state_init
(
&
c
->
state_tracker
,
GRPC_CHANNEL_IDLE
,
"subchannel"
);
"subchannel"
);
gpr_backoff_init
(
&
c
->
backoff_state
,
GRPC_SUBCHANNEL_RECONNECT_BACKOFF_MULTIPLIER
,
GRPC_SUBCHANNEL_RECONNECT_JITTER
,
GRPC_SUBCHANNEL_INITIAL_CONNECT_BACKOFF_SECONDS
*
1000
,
GRPC_SUBCHANNEL_RECONNECT_MAX_BACKOFF_SECONDS
*
1000
);
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"
))
{
GPR_ASSERT
(
c
->
args
->
args
[
i
].
type
==
GRPC_ARG_INTEGER
);
gpr_backoff_init
(
&
c
->
backoff_state
,
1
.
0
,
0
.
0
,
c
->
args
->
args
[
i
].
value
.
integer
,
c
->
args
->
args
[
i
].
value
.
integer
);
}
}
}
gpr_mu_init
(
&
c
->
mu
);
gpr_mu_init
(
&
c
->
mu
);
return
grpc_subchannel_index_register
(
exec_ctx
,
key
,
c
);
return
grpc_subchannel_index_register
(
exec_ctx
,
key
,
c
);
...
@@ -348,7 +364,7 @@ static void continue_connect(grpc_exec_ctx *exec_ctx, grpc_subchannel *c) {
...
@@ -348,7 +364,7 @@ static void continue_connect(grpc_exec_ctx *exec_ctx, grpc_subchannel *c) {
args
.
interested_parties
=
c
->
pollset_set
;
args
.
interested_parties
=
c
->
pollset_set
;
args
.
addr
=
c
->
addr
;
args
.
addr
=
c
->
addr
;
args
.
addr_len
=
c
->
addr_len
;
args
.
addr_len
=
c
->
addr_len
;
args
.
deadline
=
c
ompute_con
ne
c
t_
deadline
(
c
)
;
args
.
deadline
=
c
->
ne
x
t_
attempt
;
args
.
channel_args
=
c
->
args
;
args
.
channel_args
=
c
->
args
;
args
.
initial_connect_string
=
c
->
initial_connect_string
;
args
.
initial_connect_string
=
c
->
initial_connect_string
;
...
@@ -359,10 +375,8 @@ static void continue_connect(grpc_exec_ctx *exec_ctx, grpc_subchannel *c) {
...
@@ -359,10 +375,8 @@ static void continue_connect(grpc_exec_ctx *exec_ctx, grpc_subchannel *c) {
}
}
static
void
start_connect
(
grpc_exec_ctx
*
exec_ctx
,
grpc_subchannel
*
c
)
{
static
void
start_connect
(
grpc_exec_ctx
*
exec_ctx
,
grpc_subchannel
*
c
)
{
c
->
backoff_delta
=
gpr_time_from_seconds
(
GRPC_SUBCHANNEL_INITIAL_CONNECT_BACKOFF_SECONDS
,
GPR_TIMESPAN
);
c
->
next_attempt
=
c
->
next_attempt
=
gpr_
time_add
(
gpr_now
(
GPR_CLOCK_MONOTONIC
)
,
c
->
backoff_delta
);
gpr_
backoff_begin
(
&
c
->
backoff_state
,
gpr_now
(
GPR_CLOCK_MONOTONIC
));
continue_connect
(
exec_ctx
,
c
);
continue_connect
(
exec_ctx
,
c
);
}
}
...
@@ -579,50 +593,6 @@ static void publish_transport(grpc_exec_ctx *exec_ctx, grpc_subchannel *c) {
...
@@ -579,50 +593,6 @@ static void publish_transport(grpc_exec_ctx *exec_ctx, grpc_subchannel *c) {
gpr_free
((
void
*
)
filters
);
gpr_free
((
void
*
)
filters
);
}
}
/* Generate a random number between 0 and 1. */
static
double
generate_uniform_random_number
(
grpc_subchannel
*
c
)
{
c
->
random
=
(
1103515245
*
c
->
random
+
12345
)
%
((
uint32_t
)
1
<<
31
);
return
c
->
random
/
(
double
)((
uint32_t
)
1
<<
31
);
}
/* Update backoff_delta and next_attempt in subchannel */
static
void
update_reconnect_parameters
(
grpc_subchannel
*
c
)
{
size_t
i
;
int32_t
backoff_delta_millis
,
jitter
;
int32_t
max_backoff_millis
=
GRPC_SUBCHANNEL_RECONNECT_MAX_BACKOFF_SECONDS
*
1000
;
double
jitter_range
;
if
(
c
->
args
)
{
for
(
i
=
0
;
i
<
c
->
args
->
num_args
;
i
++
)
{
if
(
0
==
strcmp
(
c
->
args
->
args
[
i
].
key
,
"grpc.testing.fixed_reconnect_backoff"
))
{
GPR_ASSERT
(
c
->
args
->
args
[
i
].
type
==
GRPC_ARG_INTEGER
);
c
->
next_attempt
=
gpr_time_add
(
gpr_now
(
GPR_CLOCK_MONOTONIC
),
gpr_time_from_millis
(
c
->
args
->
args
[
i
].
value
.
integer
,
GPR_TIMESPAN
));
return
;
}
}
}
backoff_delta_millis
=
(
int32_t
)(
gpr_time_to_millis
(
c
->
backoff_delta
)
*
GRPC_SUBCHANNEL_RECONNECT_BACKOFF_MULTIPLIER
);
if
(
backoff_delta_millis
>
max_backoff_millis
)
{
backoff_delta_millis
=
max_backoff_millis
;
}
c
->
backoff_delta
=
gpr_time_from_millis
(
backoff_delta_millis
,
GPR_TIMESPAN
);
c
->
next_attempt
=
gpr_time_add
(
gpr_now
(
GPR_CLOCK_MONOTONIC
),
c
->
backoff_delta
);
jitter_range
=
GRPC_SUBCHANNEL_RECONNECT_JITTER
*
backoff_delta_millis
;
jitter
=
(
int32_t
)((
2
*
generate_uniform_random_number
(
c
)
-
1
)
*
jitter_range
);
c
->
next_attempt
=
gpr_time_add
(
c
->
next_attempt
,
gpr_time_from_millis
(
jitter
,
GPR_TIMESPAN
));
}
static
void
on_alarm
(
grpc_exec_ctx
*
exec_ctx
,
void
*
arg
,
bool
iomgr_success
)
{
static
void
on_alarm
(
grpc_exec_ctx
*
exec_ctx
,
void
*
arg
,
bool
iomgr_success
)
{
grpc_subchannel
*
c
=
arg
;
grpc_subchannel
*
c
=
arg
;
gpr_mu_lock
(
&
c
->
mu
);
gpr_mu_lock
(
&
c
->
mu
);
...
@@ -631,7 +601,8 @@ static void on_alarm(grpc_exec_ctx *exec_ctx, void *arg, bool iomgr_success) {
...
@@ -631,7 +601,8 @@ static void on_alarm(grpc_exec_ctx *exec_ctx, void *arg, bool iomgr_success) {
iomgr_success
=
0
;
iomgr_success
=
0
;
}
}
if
(
iomgr_success
)
{
if
(
iomgr_success
)
{
update_reconnect_parameters
(
c
);
c
->
next_attempt
=
gpr_backoff_step
(
&
c
->
backoff_state
,
gpr_now
(
GPR_CLOCK_MONOTONIC
));
continue_connect
(
exec_ctx
,
c
);
continue_connect
(
exec_ctx
,
c
);
gpr_mu_unlock
(
&
c
->
mu
);
gpr_mu_unlock
(
&
c
->
mu
);
}
else
{
}
else
{
...
@@ -661,17 +632,6 @@ static void subchannel_connected(grpc_exec_ctx *exec_ctx, void *arg,
...
@@ -661,17 +632,6 @@ static void subchannel_connected(grpc_exec_ctx *exec_ctx, void *arg,
}
}
}
}
static
gpr_timespec
compute_connect_deadline
(
grpc_subchannel
*
c
)
{
gpr_timespec
current_deadline
=
gpr_time_add
(
c
->
next_attempt
,
c
->
backoff_delta
);
gpr_timespec
min_deadline
=
gpr_time_add
(
gpr_now
(
GPR_CLOCK_MONOTONIC
),
gpr_time_from_seconds
(
GRPC_SUBCHANNEL_MIN_CONNECT_TIMEOUT_SECONDS
,
GPR_TIMESPAN
));
return
gpr_time_cmp
(
current_deadline
,
min_deadline
)
>
0
?
current_deadline
:
min_deadline
;
}
/*
/*
* grpc_subchannel_call implementation
* grpc_subchannel_call implementation
*/
*/
...
@@ -686,8 +646,8 @@ static void subchannel_call_destroy(grpc_exec_ctx *exec_ctx, void *call,
...
@@ -686,8 +646,8 @@ static void subchannel_call_destroy(grpc_exec_ctx *exec_ctx, void *call,
GPR_TIMER_END
(
"grpc_subchannel_call_unref.destroy"
,
0
);
GPR_TIMER_END
(
"grpc_subchannel_call_unref.destroy"
,
0
);
}
}
void
grpc_subchannel_call_ref
(
grpc_subchannel_call
*
c
void
grpc_subchannel_call_ref
(
GRPC_SUBCHANNEL_REF_EXTRA_ARGS
)
{
grpc_subchannel_call
*
c
GRPC_SUBCHANNEL_REF_EXTRA_ARGS
)
{
GRPC_CALL_STACK_REF
(
SUBCHANNEL_CALL_TO_CALL_STACK
(
c
),
REF_REASON
);
GRPC_CALL_STACK_REF
(
SUBCHANNEL_CALL_TO_CALL_STACK
(
c
),
REF_REASON
);
}
}
...
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