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qcacmn: add NAPI schedule latency and poll time histogram support

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Add support for NAPI schedule latency and poll time histogram stats
for WCN6450.

Change-Id: If982ebe4e3cfa80f47c6d2fe9d4cb9dfa318481d
CRs-Fixed: 3485287
This commit is contained in:
Venkateswara Naralasetty
2023-02-10 13:44:18 +05:30
committed by Rahul Choudhary
parent ad4dd18f1b
commit 9d3b562c0c
3 changed files with 163 additions and 17 deletions
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27
hif/inc/hif.h
View File

@@ -311,6 +311,23 @@ struct qca_napi_stat {
#endif
};
/*Number of buckets for latency*/
#define HIF_SCHED_LATENCY_BUCKETS 8
/*Buckets for latency between 0 to 2 ms*/
#define HIF_SCHED_LATENCY_BUCKET_0_2 2
/*Buckets for latency between 3 to 10 ms*/
#define HIF_SCHED_LATENCY_BUCKET_3_10 10
/*Buckets for latency between 11 to 20 ms*/
#define HIF_SCHED_LATENCY_BUCKET_11_20 20
/*Buckets for latency between 21 to 50 ms*/
#define HIF_SCHED_LATENCY_BUCKET_21_50 50
/*Buckets for latency between 50 to 100 ms*/
#define HIF_SCHED_LATENCY_BUCKET_51_100 100
/*Buckets for latency between 100 to 250 ms*/
#define HIF_SCHED_LATENCY_BUCKET_101_250 250
/*Buckets for latency between 250 to 500 ms*/
#define HIF_SCHED_LATENCY_BUCKET_251_500 500
/**
* struct qca_napi_info - per NAPI instance data structure
@@ -327,6 +344,9 @@ struct qca_napi_stat {
* @rx_thread_napi:
* @rx_thread_netdev:
* @lro_ctx:
* @poll_start_time: napi poll service start time
* @sched_latency_stats: napi schedule latency stats
* @tstamp: napi schedule start timestamp
*
* This data structure holds stuff per NAPI instance.
* Note that, in the current implementation, though scale is
@@ -350,6 +370,13 @@ struct qca_napi_info {
struct net_device rx_thread_netdev;
#endif /* RECEIVE_OFFLOAD */
qdf_lro_ctx_t lro_ctx;
#ifdef WLAN_FEATURE_RX_SOFTIRQ_TIME_LIMIT
unsigned long long poll_start_time;
#endif
#ifdef HIF_LATENCY_PROFILE_ENABLE
uint64_t sched_latency_stats[HIF_SCHED_LATENCY_BUCKETS];
uint64_t tstamp;
#endif
};
enum qca_napi_tput_state {

17
hif/src/hif_exec.h
View File

@@ -23,23 +23,6 @@
#include <hif.h>
#include <hif_irq_affinity.h>
#include <linux/cpumask.h>
/*Number of buckets for latency*/
#define HIF_SCHED_LATENCY_BUCKETS 8
/*Buckets for latency between 0 to 2 ms*/
#define HIF_SCHED_LATENCY_BUCKET_0_2 2
/*Buckets for latency between 3 to 10 ms*/
#define HIF_SCHED_LATENCY_BUCKET_3_10 10
/*Buckets for latency between 11 to 20 ms*/
#define HIF_SCHED_LATENCY_BUCKET_11_20 20
/*Buckets for latency between 21 to 50 ms*/
#define HIF_SCHED_LATENCY_BUCKET_21_50 50
/*Buckets for latency between 50 to 100 ms*/
#define HIF_SCHED_LATENCY_BUCKET_51_100 100
/*Buckets for latency between 100 to 250 ms*/
#define HIF_SCHED_LATENCY_BUCKET_101_250 250
/*Buckets for latency between 250 to 500 ms*/
#define HIF_SCHED_LATENCY_BUCKET_251_500 500
#ifndef IRQ_DISABLED_MAX_DURATION_NS
#define IRQ_DISABLED_MAX_DURATION_NS 100000000

136
hif/src/hif_napi.c
View File

@@ -749,6 +749,136 @@ inline void hif_napi_enable_irq(struct hif_opaque_softc *hif, int id)
hif_irq_enable(scn, NAPI_ID2PIPE(id));
}
#ifdef HIF_LATENCY_PROFILE_ENABLE
/*
* hif_napi_latency_profile_start() - update the schedule start timestamp
*
* @scn: HIF context
* ce_id: Copyengine id
*
* Return: None
*/
static inline void hif_napi_latency_profile_start(struct hif_softc *scn,
int ce_id)
{
struct qca_napi_info *napii;
napii = scn->napi_data.napis[ce_id];
if (napii)
napii->tstamp = qdf_ktime_to_ms(qdf_ktime_get());
}
/*
* hif_napi_latency_profile_measure() - calculate the NAPI schedule latency
* and update histogram
*
* @napi_info: pointer to qca_napi_info for the napi instance
*
* Return: None
*/
static void hif_napi_latency_profile_measure(struct qca_napi_info *napi_info)
{
int64_t cur_tstamp;
int64_t time_elapsed;
cur_tstamp = qdf_ktime_to_ms(qdf_ktime_get());
if (cur_tstamp > napi_info->tstamp)
time_elapsed = (cur_tstamp - napi_info->tstamp);
else
time_elapsed = ~0x0 - (napi_info->tstamp - cur_tstamp);
napi_info->tstamp = cur_tstamp;
if (time_elapsed <= HIF_SCHED_LATENCY_BUCKET_0_2)
napi_info->sched_latency_stats[0]++;
else if (time_elapsed <= HIF_SCHED_LATENCY_BUCKET_3_10)
napi_info->sched_latency_stats[1]++;
else if (time_elapsed <= HIF_SCHED_LATENCY_BUCKET_11_20)
napi_info->sched_latency_stats[2]++;
else if (time_elapsed <= HIF_SCHED_LATENCY_BUCKET_21_50)
napi_info->sched_latency_stats[3]++;
else if (time_elapsed <= HIF_SCHED_LATENCY_BUCKET_51_100)
napi_info->sched_latency_stats[4]++;
else if (time_elapsed <= HIF_SCHED_LATENCY_BUCKET_101_250)
napi_info->sched_latency_stats[5]++;
else if (time_elapsed <= HIF_SCHED_LATENCY_BUCKET_251_500)
napi_info->sched_latency_stats[6]++;
else
napi_info->sched_latency_stats[7]++;
}
#else
static inline void
hif_napi_latency_profile_start(struct hif_softc *scn, int ce_id)
{
}
static inline void
hif_napi_latency_profile_measure(struct qca_napi_info *napi_info)
{
}
#endif
#ifdef WLAN_FEATURE_RX_SOFTIRQ_TIME_LIMIT
/**
* hif_napi_update_service_start_time() - Update NAPI poll start time
*
* @napi_info: per NAPI instance data structure
*
* The function is called at the beginning of a NAPI poll to record the poll
* start time.
*
* Return: None
*/
static inline void
hif_napi_update_service_start_time(struct qca_napi_info *napi_info)
{
napi_info->poll_start_time = qdf_time_sched_clock();
}
/**
* hif_napi_fill_poll_time_histogram() - fills poll time histogram for a NAPI
*
* @napi_info: per NAPI instance data structure
*
* The function is called at the end of a NAPI poll to calculate poll time
* buckets.
*
* Return: void
*/
static void hif_napi_fill_poll_time_histogram(struct qca_napi_info *napi_info)
{
struct qca_napi_stat *napi_stat;
unsigned long long poll_time_ns;
uint32_t poll_time_us;
uint32_t bucket_size_us = 500;
uint32_t bucket;
uint32_t cpu_id = qdf_get_cpu();
poll_time_ns = qdf_time_sched_clock() - napi_info->poll_start_time;
poll_time_us = qdf_do_div(poll_time_ns, 1000);
napi_stat = &napi_info->stats[cpu_id];
if (poll_time_ns > napi_info->stats[cpu_id].napi_max_poll_time)
napi_info->stats[cpu_id].napi_max_poll_time = poll_time_ns;
bucket = poll_time_us / bucket_size_us;
if (bucket >= QCA_NAPI_NUM_BUCKETS)
bucket = QCA_NAPI_NUM_BUCKETS - 1;
++napi_stat->poll_time_buckets[bucket];
}
#else
static inline void
hif_napi_update_service_start_time(struct qca_napi_info *napi_info)
{
}
static inline void
hif_napi_fill_poll_time_histogram(struct qca_napi_info *napi_info)
{
}
#endif
/**
* hif_napi_schedule() - schedules napi, updates stats
@@ -780,6 +910,7 @@ bool hif_napi_schedule(struct hif_opaque_softc *hif_ctx, int ce_id)
NULL, NULL, 0, 0);
napii->stats[cpu].napi_schedules++;
NAPI_DEBUG("scheduling napi %d (ce:%d)", napii->id, ce_id);
hif_napi_latency_profile_start(scn, ce_id);
napi_schedule(&(napii->napi));
return true;
@@ -896,6 +1027,9 @@ int hif_napi_poll(struct hif_opaque_softc *hif_ctx,
napi_info = (struct qca_napi_info *)
container_of(napi, struct qca_napi_info, napi);
hif_napi_update_service_start_time(napi_info);
hif_napi_latency_profile_measure(napi_info);
NAPI_DEBUG("%s -->(napi(%d, irq=%d), budget=%d)",
__func__, napi_info->id, napi_info->irq, budget);
@@ -979,6 +1113,8 @@ int hif_napi_poll(struct hif_opaque_softc *hif_ctx,
hif_record_ce_desc_event(hif, NAPI_ID2PIPE(napi_info->id),
NAPI_POLL_EXIT, NULL, NULL, normalized, 0);
hif_napi_fill_poll_time_histogram(napi_info);
NAPI_DEBUG("%s <--[normalized=%d]", __func__, normalized);
return normalized;
out: