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Merge "arm64: defconfig: enable CONFIG_PRINT_SUSPEND_EPOCH_QGKI"

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qctecmdr 2020-12-16 22:16:33 -08:00 • committed by Gerrit - the friendly Code Review server
commit be3525da72
3 changed files with 28 additions and 0 deletions
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1
arch/arm64/configs/vendor/lahaina_QGKI.config vendored
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@ -253,3 +253,4 @@ CONFIG_QTI_HW_MEMLAT_SCMI_CLIENT=y
CONFIG_QTI_HW_MEMLAT_LOG=y
CONFIG_SRAM=y
CONFIG_CRYPTO_SHA1_ARM64_CE=y
CONFIG_PRINT_SUSPEND_EPOCH_QGKI=y

10
kernel/time/Kconfig
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@ -52,6 +52,16 @@ config GENERIC_CLOCKEVENTS_MIN_ADJUST
config GENERIC_CMOS_UPDATE
bool
config PRINT_SUSPEND_EPOCH_QGKI
bool "Print epoch values in suspend resume cycles"
depends on QGKI
help
Print epoch values when device enter and exit out of suspend
and resume. These epoch values are useful to know how long
the device is in suspend state. These values can be used to
synchronize various subsystem timestamps and have an unique
timestamp to correlate between various subsystems.
if GENERIC_CLOCKEVENTS
menu "Timers subsystem"

17
kernel/time/sched_clock.c
View file

@ -71,6 +71,12 @@ struct clock_data {
static struct hrtimer sched_clock_timer;
static int irqtime = -1;
#ifdef CONFIG_PRINT_SUSPEND_EPOCH_QGKI
static u64 suspend_ns;
static u64 suspend_cycles;
static u64 resume_cycles;
#endif
core_param(irqtime, irqtime, int, 0400);
static u64 notrace jiffy_sched_clock_read(void)
@ -280,6 +286,13 @@ int sched_clock_suspend(void)
struct clock_read_data *rd = &cd.read_data[0];
update_sched_clock();
#ifdef CONFIG_PRINT_SUSPEND_EPOCH_QGKI
suspend_ns = rd->epoch_ns;
suspend_cycles = rd->epoch_cyc;
pr_info("suspend ns:%17llu suspend cycles:%17llu\n",
rd->epoch_ns, rd->epoch_cyc);
#endif
hrtimer_cancel(&sched_clock_timer);
rd->read_sched_clock = suspended_sched_clock_read;
@ -292,6 +305,10 @@ void sched_clock_resume(void)
rd->epoch_cyc = cd.actual_read_sched_clock();
hrtimer_start(&sched_clock_timer, cd.wrap_kt, HRTIMER_MODE_REL_HARD);
#ifdef CONFIG_PRINT_SUSPEND_EPOCH_QGKI
resume_cycles = rd->epoch_cyc;
pr_info("resume cycles:%17llu\n", rd->epoch_cyc);
#endif
rd->read_sched_clock = cd.actual_read_sched_clock;
}