samsung-sm8650/android_kernel_samsung_sm8650-modules
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

qcacmn: Add queue information to scheduler history

Browse Source 
In order to triage latency issues in the scheduler thread, track which
queue a message was queue in, when each message was queued, how long it
spent in queue, and the depth of the queue at the point of insertion.

Change-Id: I83edd04e668d5a2674ca71495fc904092b3ab800
CRs-Fixed: 2322561
This commit is contained in:
Dustin Brown
2018-09-25 16:11:53 -07:00
committed by nshrivas
parent 27551277a1
commit dae10a5fbc
2 changed files with 43 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
scheduler/inc/scheduler_api.h
View File

@@ -73,6 +73,9 @@ typedef enum {
* callback in message body pointer for those messages which have taken ref
* count for above mentioned common objects.
* @node: list node for queue membership
* @queue_id: Id of the queue the message was added to
* @queue_depth: depth of the queue when the message was queued
* @queued_at_us: timestamp when the message was queued in microseconds
*/
struct scheduler_msg {
uint16_t type;
@@ -82,6 +85,11 @@ struct scheduler_msg {
void *callback;
void *flush_callback;
qdf_list_node_t node;
#ifdef WLAN_SCHED_HISTORY_SIZE
QDF_MODULE_ID queue_id;
uint32_t queue_depth;
uint64_t queued_at_us;
#endif /* WLAN_SCHED_HISTORY_SIZE */
};
typedef QDF_STATUS (*scheduler_msg_process_fn_t) (struct scheduler_msg *msg);

39
scheduler/src/scheduler_core.c
View File

@@ -32,22 +32,48 @@ DEFINE_QDF_FLEX_MEM_POOL(sched_pool, sizeof(struct scheduler_msg),
#ifdef WLAN_SCHED_HISTORY_SIZE
/**
* struct sched_history_item - metrics for a scheduler message
* @callback: the message's execution callback
* @type_id: the message's type_id
* @queue_id: Id of the queue the message was added to
* @queue_start_us: timestamp when the message was queued in microseconds
* @queue_duration_us: duration the message was queued in microseconds
* @queue_depth: depth of the queue when the message was queued
* @run_start_us: timesatmp when the message started execution in microseconds
* @run_duration_us: duration the message was executed in microseconds
*/
struct sched_history_item {
void *callback;
uint32_t type_id;
uint64_t start_us;
uint64_t duration_us;
QDF_MODULE_ID queue_id;
uint64_t queue_start_us;
uint32_t queue_duration_us;
uint32_t queue_depth;
uint64_t run_start_us;
uint32_t run_duration_us;
};
static struct sched_history_item sched_history[WLAN_SCHED_HISTORY_SIZE];
static uint32_t sched_history_index;
static void sched_history_queue(struct scheduler_mq_type *queue,
struct scheduler_msg *msg)
{
msg->queue_id = queue->qid;
msg->queue_depth = qdf_list_size(&queue->mq_list);
msg->queued_at_us = qdf_get_log_timestamp_usecs();
}
static void sched_history_start(struct scheduler_msg *msg)
{
uint64_t started_at_us = qdf_get_log_timestamp_usecs();
struct sched_history_item hist = {
.callback = msg->callback,
.type_id = msg->type,
.start_us = qdf_get_log_timestamp_usecs(),
.queue_start_us = msg->queued_at_us,
.queue_duration_us = started_at_us - msg->queued_at_us,
.run_start_us = started_at_us,
};
sched_history[sched_history_index] = hist;
@@ -56,8 +82,9 @@ static void sched_history_start(struct scheduler_msg *msg)
static void sched_history_stop(void)
{
struct sched_history_item *hist = &sched_history[sched_history_index];
uint64_t stopped_at_us = qdf_get_log_timestamp_usecs();
hist->duration_us = qdf_get_log_timestamp_usecs() - hist->start_us;
hist->run_duration_us = stopped_at_us - hist->run_start_us;
sched_history_index++;
sched_history_index %= WLAN_SCHED_HISTORY_SIZE;
@@ -65,6 +92,8 @@ static void sched_history_stop(void)
#else /* WLAN_SCHED_HISTORY_SIZE */
static inline void sched_history_queue(struct scheduler_mq_type *queue,
struct scheduler_msg *msg) { }
static inline void sched_history_start(struct scheduler_msg *msg) { }
static inline void sched_history_stop(void) { }
@@ -176,6 +205,7 @@ void scheduler_mq_put(struct scheduler_mq_type *msg_q,
struct scheduler_msg *msg)
{
qdf_spin_lock_irqsave(&msg_q->mq_lock);
sched_history_queue(msg_q, msg);
qdf_list_insert_back(&msg_q->mq_list, &msg->node);
qdf_spin_unlock_irqrestore(&msg_q->mq_lock);
}
@@ -184,6 +214,7 @@ void scheduler_mq_put_front(struct scheduler_mq_type *msg_q,
struct scheduler_msg *msg)
{
qdf_spin_lock_irqsave(&msg_q->mq_lock);
sched_history_queue(msg_q, msg);
qdf_list_insert_front(&msg_q->mq_list, &msg->node);
qdf_spin_unlock_irqrestore(&msg_q->mq_lock);
}