msm: tracing: Add ftrace support for LPM driver
Add trace event support to capture various parameters of low power modes like power collapse, standalone power collapse, retention and wfi during its entry and exit. Change-Id: I0f8b918702ae47b354aa193aa7ef20b48110fb0f Signed-off-by: Priyanka Mathur <pmathur@codeaurora.org>
This commit is contained in:
Priyanka Mathur
Stephen Boyd
parent
fba7f7b998
commit
454c036f67
|
|
@ -0,0 +1,45 @@
|
|||
Subsystem Trace Points: msm_low_power
|
||||
|
||||
The msm_low_power tracing system captures the events during the entry
|
||||
and exit of various low power modes like power collapse, standalone
|
||||
power collapse, retention and wfi. The tracing system adds the following
|
||||
events to capture the state of the low power mode.
|
||||
|
||||
1) msm_pm_enter
|
||||
===================
|
||||
msm_pm_enter: cpu: %u latency: %uus sleep: %uus
|
||||
msm_pm_enter_pc: cpu: %u latency: %uus sleep: %uus wake_up: %u
|
||||
msm_pm_enter_ret: cpu: %u latency: %uus sleep: %uus wake_up: %u
|
||||
msm_pm_enter_spc: cpu: %u latency: %uus sleep: %uus wake_up: %u
|
||||
msm_pm_enter_wfi: cpu: %u latency: %uus sleep: %uus wake_up: %u
|
||||
|
||||
The event captures various parameters during the entry into low power
|
||||
modes.
|
||||
|
||||
The 'cpu' parameter represents the cpu on which the low power mode is
|
||||
chosen.
|
||||
|
||||
The 'latency_us' parameter represents the system latency at the time of
|
||||
choosing the low power mode.
|
||||
|
||||
The 'sleep_us' parameter tells the maximum amount of time the kernel can
|
||||
sleep in this low power mode.
|
||||
|
||||
The 'wake_up' parameter tells if there was any immediate wakeup required
|
||||
before entering low power mode.
|
||||
|
||||
2) msm_pm_exit
|
||||
=================
|
||||
msm_pm_exit: cpu:%u success:%d
|
||||
msm_pm_exit_pc: cpu:%u success:%d
|
||||
msm_pm_exit_ret: cpu:%u success:%d
|
||||
msm_pm_exit_spc: cpu:%u success:%d
|
||||
msm_pm_exit_wfi: cpu:%u success:%d
|
||||
|
||||
The event captures parameters during the exit of the low power modes.
|
||||
|
||||
The 'cpu' parameter represents the cpu on which the low power mode is chosen.
|
||||
|
||||
The 'success' parameter shows the state of power collapse/standalone power
|
||||
collapse. It will be set if power collapse/standalone power collapse were
|
||||
successful. For the rest of the low power modes it is set to one.
|
||||
|
|
@ -50,7 +50,8 @@
|
|||
#include "timer.h"
|
||||
#include "pm-boot.h"
|
||||
#include <mach/event_timer.h>
|
||||
|
||||
#define CREATE_TRACE_POINTS
|
||||
#include "trace_msm_low_power.h"
|
||||
/******************************************************************************
|
||||
* Debug Definitions
|
||||
*****************************************************************************/
|
||||
|
|
@ -723,6 +724,51 @@ void arch_idle(void)
|
|||
return;
|
||||
}
|
||||
|
||||
static inline void msm_pm_ftrace_lpm_enter(unsigned int cpu,
|
||||
uint32_t latency, uint32_t sleep_us,
|
||||
uint32_t wake_up,
|
||||
enum msm_pm_sleep_mode mode)
|
||||
{
|
||||
switch (mode) {
|
||||
case MSM_PM_SLEEP_MODE_WAIT_FOR_INTERRUPT:
|
||||
trace_msm_pm_enter_wfi(cpu, latency, sleep_us, wake_up);
|
||||
break;
|
||||
case MSM_PM_SLEEP_MODE_POWER_COLLAPSE_STANDALONE:
|
||||
trace_msm_pm_enter_spc(cpu, latency, sleep_us, wake_up);
|
||||
break;
|
||||
case MSM_PM_SLEEP_MODE_POWER_COLLAPSE:
|
||||
trace_msm_pm_enter_pc(cpu, latency, sleep_us, wake_up);
|
||||
break;
|
||||
case MSM_PM_SLEEP_MODE_RETENTION:
|
||||
trace_msm_pm_enter_ret(cpu, latency, sleep_us, wake_up);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static inline void msm_pm_ftrace_lpm_exit(unsigned int cpu,
|
||||
enum msm_pm_sleep_mode mode,
|
||||
bool success)
|
||||
{
|
||||
switch (mode) {
|
||||
case MSM_PM_SLEEP_MODE_WAIT_FOR_INTERRUPT:
|
||||
trace_msm_pm_exit_wfi(cpu, success);
|
||||
break;
|
||||
case MSM_PM_SLEEP_MODE_POWER_COLLAPSE_STANDALONE:
|
||||
trace_msm_pm_exit_spc(cpu, success);
|
||||
break;
|
||||
case MSM_PM_SLEEP_MODE_POWER_COLLAPSE:
|
||||
trace_msm_pm_exit_pc(cpu, success);
|
||||
break;
|
||||
case MSM_PM_SLEEP_MODE_RETENTION:
|
||||
trace_msm_pm_exit_ret(cpu, success);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
int msm_pm_idle_prepare(struct cpuidle_device *dev,
|
||||
struct cpuidle_driver *drv, int index)
|
||||
{
|
||||
|
|
@ -827,6 +873,11 @@ int msm_pm_idle_prepare(struct cpuidle_device *dev,
|
|||
|
||||
if (modified_time_us && !dev->cpu)
|
||||
msm_pm_set_timer(modified_time_us);
|
||||
|
||||
msm_pm_ftrace_lpm_enter(dev->cpu, time_param.latency_us,
|
||||
time_param.sleep_us, time_param.next_event_us,
|
||||
ret);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
|
@ -834,6 +885,7 @@ int msm_pm_idle_enter(enum msm_pm_sleep_mode sleep_mode)
|
|||
{
|
||||
int64_t time;
|
||||
int exit_stat;
|
||||
bool collapsed = 1;
|
||||
|
||||
if (MSM_PM_DEBUG_IDLE & msm_pm_debug_mask)
|
||||
pr_info("CPU%u: %s: mode %d\n",
|
||||
|
|
@ -853,7 +905,7 @@ int msm_pm_idle_enter(enum msm_pm_sleep_mode sleep_mode)
|
|||
break;
|
||||
|
||||
case MSM_PM_SLEEP_MODE_POWER_COLLAPSE_STANDALONE:
|
||||
msm_pm_power_collapse_standalone(true);
|
||||
collapsed = msm_pm_power_collapse_standalone(true);
|
||||
exit_stat = MSM_PM_STAT_IDLE_STANDALONE_POWER_COLLAPSE;
|
||||
break;
|
||||
|
||||
|
|
@ -864,8 +916,6 @@ int msm_pm_idle_enter(enum msm_pm_sleep_mode sleep_mode)
|
|||
int ret = -ENODEV;
|
||||
int notify_rpm =
|
||||
(sleep_mode == MSM_PM_SLEEP_MODE_POWER_COLLAPSE);
|
||||
int collapsed;
|
||||
|
||||
timer_expiration = msm_pm_timer_enter_idle();
|
||||
|
||||
sleep_delay = (uint32_t) msm_pm_convert_and_cap_time(
|
||||
|
|
@ -900,6 +950,8 @@ int msm_pm_idle_enter(enum msm_pm_sleep_mode sleep_mode)
|
|||
|
||||
time = ktime_to_ns(ktime_get()) - time;
|
||||
msm_pm_add_stat(exit_stat, time);
|
||||
msm_pm_ftrace_lpm_exit(smp_processor_id(), sleep_mode,
|
||||
collapsed);
|
||||
|
||||
do_div(time, 1000);
|
||||
return (int) time;
|
||||
|
|
|
|||
|
|
@ -0,0 +1,133 @@
|
|||
/* Copyright (c) 2012, The Linux Foundation. All rights reserved.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 and
|
||||
* only version 2 as published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*/
|
||||
|
||||
#undef TRACE_SYSTEM
|
||||
#define TRACE_SYSTEM msm_low_power
|
||||
|
||||
#if !defined(_TRACE_MSM_LOW_POWER_H_) || defined(TRACE_HEADER_MULTI_READ)
|
||||
#define _TRACE_MSM_LOW_POWER_H_
|
||||
|
||||
#include <linux/tracepoint.h>
|
||||
|
||||
DECLARE_EVENT_CLASS(msm_pm_enter,
|
||||
|
||||
TP_PROTO(unsigned int cpu, uint32_t latency,
|
||||
uint32_t sleep_us, uint32_t wake_up),
|
||||
|
||||
TP_ARGS(cpu, latency, sleep_us, wake_up),
|
||||
|
||||
TP_STRUCT__entry(
|
||||
__field(unsigned int, cpu)
|
||||
__field(uint32_t, latency)
|
||||
__field(uint32_t, sleep_us)
|
||||
__field(uint32_t, wake_up)
|
||||
),
|
||||
|
||||
TP_fast_assign(
|
||||
__entry->cpu = cpu;
|
||||
__entry->latency = latency;
|
||||
__entry->sleep_us = sleep_us;
|
||||
__entry->wake_up = wake_up;
|
||||
),
|
||||
|
||||
TP_printk("cpu: %u latency: %uus sleep: %uus wake_up: %u",
|
||||
__entry->cpu,
|
||||
__entry->latency,
|
||||
__entry->sleep_us,
|
||||
__entry->wake_up)
|
||||
);
|
||||
|
||||
DEFINE_EVENT(msm_pm_enter, msm_pm_enter_pc,
|
||||
|
||||
TP_PROTO(unsigned int cpu, uint32_t latency,
|
||||
uint32_t sleep_us, uint32_t wake_up),
|
||||
|
||||
TP_ARGS(cpu, latency, sleep_us, wake_up)
|
||||
);
|
||||
|
||||
DEFINE_EVENT(msm_pm_enter, msm_pm_enter_ret,
|
||||
|
||||
TP_PROTO(unsigned int cpu, uint32_t latency,
|
||||
uint32_t sleep_us, uint32_t wake_up),
|
||||
|
||||
TP_ARGS(cpu, latency, sleep_us, wake_up)
|
||||
);
|
||||
|
||||
DEFINE_EVENT(msm_pm_enter, msm_pm_enter_spc,
|
||||
|
||||
TP_PROTO(unsigned int cpu, uint32_t latency,
|
||||
uint32_t sleep_us, uint32_t wake_up),
|
||||
|
||||
TP_ARGS(cpu, latency, sleep_us, wake_up)
|
||||
);
|
||||
|
||||
DEFINE_EVENT(msm_pm_enter, msm_pm_enter_wfi,
|
||||
|
||||
TP_PROTO(unsigned int cpu, uint32_t latency,
|
||||
uint32_t sleep_us, uint32_t wake_up),
|
||||
|
||||
TP_ARGS(cpu, latency, sleep_us, wake_up)
|
||||
);
|
||||
|
||||
DECLARE_EVENT_CLASS(msm_pm_exit,
|
||||
|
||||
TP_PROTO(unsigned int cpu, bool success),
|
||||
|
||||
TP_ARGS(cpu, success),
|
||||
|
||||
TP_STRUCT__entry(
|
||||
__field(unsigned int , cpu)
|
||||
__field(int, success)
|
||||
),
|
||||
|
||||
TP_fast_assign(
|
||||
__entry->cpu = cpu;
|
||||
__entry->success = success;
|
||||
),
|
||||
|
||||
TP_printk("cpu:%u success:%d",
|
||||
__entry->cpu,
|
||||
__entry->success)
|
||||
);
|
||||
|
||||
DEFINE_EVENT(msm_pm_exit, msm_pm_exit_pc,
|
||||
|
||||
TP_PROTO(unsigned int cpu, bool success),
|
||||
|
||||
TP_ARGS(cpu, success)
|
||||
);
|
||||
|
||||
DEFINE_EVENT(msm_pm_exit, msm_pm_exit_ret,
|
||||
|
||||
TP_PROTO(unsigned int cpu, bool success),
|
||||
|
||||
TP_ARGS(cpu, success)
|
||||
);
|
||||
|
||||
DEFINE_EVENT(msm_pm_exit, msm_pm_exit_spc,
|
||||
|
||||
TP_PROTO(unsigned int cpu, bool success),
|
||||
|
||||
TP_ARGS(cpu, success)
|
||||
);
|
||||
|
||||
DEFINE_EVENT(msm_pm_exit, msm_pm_exit_wfi,
|
||||
|
||||
TP_PROTO(unsigned int cpu, bool success),
|
||||
|
||||
TP_ARGS(cpu, success)
|
||||
);
|
||||
#endif
|
||||
#undef TRACE_INCLUDE_PATH
|
||||
#define TRACE_INCLUDE_PATH .
|
||||
#define TRACE_INCLUDE_FILE trace_msm_low_power
|
||||
#include <trace/define_trace.h>
|
||||
Loading…
Reference in New Issue