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Merge pull request #7962 from y-zeng/call_holder_add_pollent

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Add calls' polling entities to the pollset_set of client_channel
pull/8350/merge
Yuchen Zeng 8 years ago committed by GitHub
parent 3808b6efe6 3efcb48c26
commit f3d71d21b9
5 changed files with 24 additions and 39 deletions
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  1. 22
      src/core/ext/client_config/client_channel.c
  2. 6
      src/core/ext/client_config/lb_policy.h
  3. 11
      src/core/ext/lb_policy/grpclb/grpclb.c
  4. 12
      src/core/ext/lb_policy/pick_first/pick_first.c
  5. 12
      src/core/ext/lb_policy/round_robin/round_robin.c

22
src/core/ext/client_config/client_channel.c
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@ -513,10 +513,14 @@ static void retry_waiting_locked(grpc_exec_ctx *exec_ctx, call_data *calld) {
static void subchannel_ready(grpc_exec_ctx *exec_ctx, void *arg,
grpc_error *error) {
call_data *calld = arg;
grpc_call_element *elem = arg;
call_data *calld = elem->call_data;
channel_data *chand = elem->channel_data;
gpr_mu_lock(&calld->mu);
GPR_ASSERT(calld->creation_phase ==
GRPC_SUBCHANNEL_CALL_HOLDER_PICKING_SUBCHANNEL);
grpc_polling_entity_del_from_pollset_set(exec_ctx, calld->pollent,
chand->interested_parties);
calld->creation_phase = GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING;
if (calld->connected_subchannel == NULL) {
gpr_atm_no_barrier_store(&calld->subchannel_call, 1);
@ -564,6 +568,9 @@ typedef struct {
grpc_closure closure;
} continue_picking_args;
/** Return true if subchannel is available immediately (in which case on_ready
should not be called), or false otherwise (in which case on_ready should be
called when the subchannel is available). */
static bool pick_subchannel(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
grpc_metadata_batch *initial_metadata,
uint32_t initial_metadata_flags,
@ -629,8 +636,8 @@ static bool pick_subchannel(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
gpr_mu_unlock(&chand->mu);
// TODO(dgq): make this deadline configurable somehow.
const grpc_lb_policy_pick_args inputs = {
calld->pollent, initial_metadata, initial_metadata_flags,
&calld->lb_token_mdelem, gpr_inf_future(GPR_CLOCK_MONOTONIC)};
initial_metadata, initial_metadata_flags, &calld->lb_token_mdelem,
gpr_inf_future(GPR_CLOCK_MONOTONIC)};
r = grpc_lb_policy_pick(exec_ctx, lb_policy, &inputs, connected_subchannel,
NULL, on_ready);
GRPC_LB_POLICY_UNREF(exec_ctx, lb_policy, "pick_subchannel");
@ -672,6 +679,7 @@ static void cc_start_transport_stream_op(grpc_exec_ctx *exec_ctx,
grpc_call_element *elem,
grpc_transport_stream_op *op) {
call_data *calld = elem->call_data;
channel_data *chand = elem->channel_data;
GRPC_CALL_LOG_OP(GPR_INFO, elem, op);
grpc_deadline_state_client_start_transport_stream_op(exec_ctx, elem, op);
/* try to (atomically) get the call */
@ -739,14 +747,20 @@ retry:
calld->connected_subchannel == NULL &&
op->send_initial_metadata != NULL) {
calld->creation_phase = GRPC_SUBCHANNEL_CALL_HOLDER_PICKING_SUBCHANNEL;
grpc_closure_init(&calld->next_step, subchannel_ready, calld);
grpc_closure_init(&calld->next_step, subchannel_ready, elem);
GRPC_CALL_STACK_REF(calld->owning_call, "pick_subchannel");
/* If a subchannel is not available immediately, the polling entity from
call_data should be provided to channel_data's interested_parties, so
that IO of the lb_policy and resolver could be done under it. */
if (pick_subchannel(exec_ctx, elem, op->send_initial_metadata,
op->send_initial_metadata_flags,
&calld->connected_subchannel, &calld->next_step,
GRPC_ERROR_NONE)) {
calld->creation_phase = GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING;
GRPC_CALL_STACK_UNREF(exec_ctx, calld->owning_call, "pick_subchannel");
} else {
grpc_polling_entity_add_to_pollset_set(exec_ctx, calld->pollent,
chand->interested_parties);
}
}
/* if we've got a subchannel, then let's ask it to create a call */

6
src/core/ext/client_config/lb_policy.h
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@ -35,7 +35,6 @@
#define GRPC_CORE_EXT_CLIENT_CONFIG_LB_POLICY_H
#include "src/core/ext/client_config/subchannel.h"
#include "src/core/lib/iomgr/polling_entity.h"
#include "src/core/lib/transport/connectivity_state.h"
/** A load balancing policy: specified by a vtable and a struct (which
@ -55,8 +54,6 @@ struct grpc_lb_policy {
/** Extra arguments for an LB pick */
typedef struct grpc_lb_policy_pick_args {
/** Parties interested in the pick's progress */
grpc_polling_entity *pollent;
/** Initial metadata associated with the picking call. */
grpc_metadata_batch *initial_metadata;
/** Bitmask used for selective cancelling. See \a
@ -153,7 +150,8 @@ void grpc_lb_policy_init(grpc_lb_policy *policy,
once the pick is complete with its error argument set to indicate
success or failure.
Any I/O should be done under \a pick_args->pollent. */
Any IO should be done under the \a interested_parties \a grpc_pollset_set
in the \a grpc_lb_policy struct. */
int grpc_lb_policy_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
const grpc_lb_policy_pick_args *pick_args,
grpc_connected_subchannel **target, void **user_data,

11
src/core/ext/lb_policy/grpclb/grpclb.c
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@ -458,6 +458,9 @@ static void rr_handover(grpc_exec_ctx *exec_ctx, glb_lb_policy *glb_policy,
(intptr_t)glb_policy->rr_policy);
}
GPR_ASSERT(glb_policy->rr_policy != NULL);
grpc_pollset_set_add_pollset_set(exec_ctx,
glb_policy->rr_policy->interested_parties,
glb_policy->base.interested_parties);
glb_policy->rr_connectivity->state = grpc_lb_policy_check_connectivity(
exec_ctx, glb_policy->rr_policy, &error);
grpc_lb_policy_notify_on_state_change(
@ -686,8 +689,6 @@ static void glb_cancel_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
while (pp != NULL) {
pending_pick *next = pp->next;
if (pp->target == target) {
grpc_polling_entity_del_from_pollset_set(
exec_ctx, pp->pick_args.pollent, glb_policy->base.interested_parties);
*target = NULL;
grpc_exec_ctx_sched(
exec_ctx, &pp->wrapped_on_complete,
@ -719,8 +720,6 @@ static void glb_cancel_picks(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
pending_pick *next = pp->next;
if ((pp->pick_args.initial_metadata_flags & initial_metadata_flags_mask) ==
initial_metadata_flags_eq) {
grpc_polling_entity_del_from_pollset_set(
exec_ctx, pp->pick_args.pollent, glb_policy->base.interested_parties);
grpc_exec_ctx_sched(
exec_ctx, &pp->wrapped_on_complete,
GRPC_ERROR_CREATE_REFERENCING("Pick Cancelled", &error, 1), NULL);
@ -806,8 +805,6 @@ static int glb_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
} else {
/* else, the pending pick will be registered and taken care of by the
* pending pick list inside the RR policy (glb_policy->rr_policy) */
grpc_polling_entity_add_to_pollset_set(exec_ctx, pick_args->pollent,
glb_policy->base.interested_parties);
add_pending_pick(&glb_policy->pending_picks, pick_args, target,
on_complete);
@ -931,7 +928,7 @@ static lb_client_data *lb_client_data_create(glb_lb_policy *glb_policy) {
/* Note the following LB call progresses every time there's activity in \a
* glb_policy->base.interested_parties, which is comprised of the polling
* entities passed to glb_pick(). */
* entities from \a client_channel. */
lb_client->lb_call = grpc_channel_create_pollset_set_call(
glb_policy->lb_channel, NULL, GRPC_PROPAGATE_DEFAULTS,
glb_policy->base.interested_parties,

12
src/core/ext/lb_policy/pick_first/pick_first.c
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@ -39,7 +39,6 @@
typedef struct pending_pick {
struct pending_pick *next;
grpc_polling_entity *pollent;
uint32_t initial_metadata_flags;
grpc_connected_subchannel **target;
grpc_closure *on_complete;
@ -119,8 +118,6 @@ static void pf_shutdown(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
while (pp != NULL) {
pending_pick *next = pp->next;
*pp->target = NULL;
grpc_polling_entity_del_from_pollset_set(exec_ctx, pp->pollent,
p->base.interested_parties);
grpc_exec_ctx_sched(exec_ctx, pp->on_complete, GRPC_ERROR_NONE, NULL);
gpr_free(pp);
pp = next;
@ -138,8 +135,6 @@ static void pf_cancel_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
while (pp != NULL) {
pending_pick *next = pp->next;
if (pp->target == target) {
grpc_polling_entity_del_from_pollset_set(exec_ctx, pp->pollent,
p->base.interested_parties);
*target = NULL;
grpc_exec_ctx_sched(
exec_ctx, pp->on_complete,
@ -168,8 +163,6 @@ static void pf_cancel_picks(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
pending_pick *next = pp->next;
if ((pp->initial_metadata_flags & initial_metadata_flags_mask) ==
initial_metadata_flags_eq) {
grpc_polling_entity_del_from_pollset_set(exec_ctx, pp->pollent,
p->base.interested_parties);
grpc_exec_ctx_sched(
exec_ctx, pp->on_complete,
GRPC_ERROR_CREATE_REFERENCING("Pick Cancelled", &error, 1), NULL);
@ -229,11 +222,8 @@ static int pf_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
if (!p->started_picking) {
start_picking(exec_ctx, p);
}
grpc_polling_entity_add_to_pollset_set(exec_ctx, pick_args->pollent,
p->base.interested_parties);
pp = gpr_malloc(sizeof(*pp));
pp->next = p->pending_picks;
pp->pollent = pick_args->pollent;
pp->target = target;
pp->initial_metadata_flags = pick_args->initial_metadata_flags;
pp->on_complete = on_complete;
@ -319,8 +309,6 @@ static void pf_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
while ((pp = p->pending_picks)) {
p->pending_picks = pp->next;
*pp->target = selected;
grpc_polling_entity_del_from_pollset_set(exec_ctx, pp->pollent,
p->base.interested_parties);
grpc_exec_ctx_sched(exec_ctx, pp->on_complete, GRPC_ERROR_NONE, NULL);
gpr_free(pp);
}

12
src/core/ext/lb_policy/round_robin/round_robin.c
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@ -78,9 +78,6 @@ int grpc_lb_round_robin_trace = 0;
typedef struct pending_pick {
struct pending_pick *next;
/* polling entity for the pick()'s async notification */
grpc_polling_entity *pollent;
/* output argument where to store the pick()ed user_data. It'll be NULL if no
* such data is present or there's an error (the definite test for errors is
* \a target being NULL). */
@ -318,8 +315,6 @@ static void rr_cancel_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
while (pp != NULL) {
pending_pick *next = pp->next;
if (pp->target == target) {
grpc_polling_entity_del_from_pollset_set(exec_ctx, pp->pollent,
p->base.interested_parties);
*target = NULL;
grpc_exec_ctx_sched(
exec_ctx, pp->on_complete,
@ -348,8 +343,6 @@ static void rr_cancel_picks(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
pending_pick *next = pp->next;
if ((pp->initial_metadata_flags & initial_metadata_flags_mask) ==
initial_metadata_flags_eq) {
grpc_polling_entity_del_from_pollset_set(exec_ctx, pp->pollent,
p->base.interested_parties);
*pp->target = NULL;
grpc_exec_ctx_sched(
exec_ctx, pp->on_complete,
@ -422,11 +415,8 @@ static int rr_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
if (!p->started_picking) {
start_picking(exec_ctx, p);
}
grpc_polling_entity_add_to_pollset_set(exec_ctx, pick_args->pollent,
p->base.interested_parties);
pp = gpr_malloc(sizeof(*pp));
pp->next = p->pending_picks;
pp->pollent = pick_args->pollent;
pp->target = target;
pp->on_complete = on_complete;
pp->initial_metadata_flags = pick_args->initial_metadata_flags;
@ -482,8 +472,6 @@ static void rr_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
"[RR CONN CHANGED] TARGET <-- SUBCHANNEL %p (NODE %p)",
(void *)selected->subchannel, (void *)selected);
}
grpc_polling_entity_del_from_pollset_set(exec_ctx, pp->pollent,
p->base.interested_parties);
grpc_exec_ctx_sched(exec_ctx, pp->on_complete, GRPC_ERROR_NONE, NULL);
gpr_free(pp);
}

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