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cpufreq: qcom-hw: Add trace for irq and throttle freq polling

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Add trace events in irq handler and throttle frequency polling
to capture DCVSH updates to sched and or when lmh irq is high.

Change-Id: I96c1af1abeb24971b8d060457feee1dbadcdb028
Signed-off-by: Vivek Aknurwar <quic_viveka@quicinc.com>
Signed-off-by: Mike Tipton <quic_mdtipton@quicinc.com>
This commit is contained in:
Vivek Aknurwar 2022-03-03 11:08:37 -08:00 committed by Mike Tipton
parent 0785922904
commit b67959cb83
2 changed files with 75 additions and 2 deletions
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14
drivers/cpufreq/qcom-cpufreq-hw.c
View File

@ -17,6 +17,9 @@
#include <linux/spinlock.h>
#include <linux/qcom-cpufreq-hw.h>
#define CREATE_TRACE_POINTS
#include <trace/events/dcvsh.h>
#define LUT_MAX_ENTRIES 40U
#define LUT_SRC GENMASK(31, 30)
#define LUT_L_VAL GENMASK(7, 0)
@ -379,6 +382,8 @@ static void qcom_lmh_dcvs_notify(struct qcom_cpufreq_data *data)
} else {
throttled_freq = freq_hz / HZ_PER_KHZ;
trace_dcvsh_freq(cpu, qcom_cpufreq_hw_get(cpu), throttled_freq);
/* Update thermal pressure (the boost frequencies are accepted) */
arch_update_thermal_pressure(policy->related_cpus, throttled_freq);
@ -397,11 +402,13 @@ static void qcom_lmh_dcvs_notify(struct qcom_cpufreq_data *data)
* If h/w throttled frequency is higher than what cpufreq has requested
* for, then stop polling and switch back to interrupt mechanism.
*/
if (throttled_freq >= qcom_cpufreq_hw_get(cpu))
if (throttled_freq >= qcom_cpufreq_hw_get(cpu)) {
enable_irq(data->throttle_irq);
else
trace_dcvsh_throttle(cpu, 0);
} else {
mod_delayed_work(system_highpri_wq, &data->throttle_work,
msecs_to_jiffies(10));
}
out:
mutex_unlock(&data->throttle_lock);
@ -418,9 +425,11 @@ static void qcom_lmh_dcvs_poll(struct work_struct *work)
static irqreturn_t qcom_lmh_dcvs_handle_irq(int irq, void *data)
{
struct qcom_cpufreq_data *c_data = data;
struct cpufreq_policy *policy = c_data->policy;
/* Disable interrupt and enable polling */
disable_irq_nosync(c_data->throttle_irq);
trace_dcvsh_throttle(cpumask_first(policy->cpus), 1);
schedule_delayed_work(&c_data->throttle_work, 0);
if (c_data->soc_data->reg_intr_clr)
@ -532,6 +541,7 @@ static int qcom_cpufreq_hw_cpu_offline(struct cpufreq_policy *policy)
irq_set_affinity_hint(data->throttle_irq, NULL);
arch_update_thermal_pressure(policy->related_cpus, U32_MAX);
trace_dcvsh_throttle(cpumask_first(policy->related_cpus), 0);
return 0;
}

63
include/trace/events/dcvsh.h Normal file
View File

@ -0,0 +1,63 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2022, Qualcomm Innovation Center, Inc. All rights reserved.
*/
#undef TRACE_SYSTEM
#define TRACE_SYSTEM dcvsh
#if !defined(_TRACE_DCVSH_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_DCVSH_H
#include <linux/tracepoint.h>
TRACE_EVENT(dcvsh_freq,
TP_PROTO(unsigned long cpu, unsigned long req_freq,
unsigned long throttled_freq),
TP_ARGS(cpu, req_freq, throttled_freq),
TP_STRUCT__entry(
__field(unsigned long, cpu)
__field(unsigned long, req_freq)
__field(unsigned long, throttled_freq)
),
TP_fast_assign(
__entry->cpu = cpu;
__entry->req_freq = req_freq;
__entry->throttled_freq = throttled_freq;
),
TP_printk("cpu:%lu requested_freq:%lu throttled_freq:%lu",
__entry->cpu,
__entry->req_freq,
__entry->throttled_freq)
);
TRACE_EVENT(dcvsh_throttle,
TP_PROTO(unsigned long cpu, bool state),
TP_ARGS(cpu, state),
TP_STRUCT__entry(
__field(unsigned long, cpu)
__field(bool, state)
),
TP_fast_assign(
__entry->cpu = cpu;
__entry->state = state;
),
TP_printk("cpu:%lu throttle_%s",
__entry->cpu,
__entry->state ? "begin" : "end")
);
#endif /* _TRACE_DCVSH_H */
/* This part must be outside protection */
#include <trace/define_trace.h>