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sched: Be explicit with loading of the waketime variable

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Explicilty load the timer waketime variable into local variables in
sched_timer_kick().  Change the optimization level from Os to O2.
This helps gcc to avoid unnecessary reloads from memory in the common
stepper_event() case.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2017-03-21 01:21:23 -04:00
parent 4dfa6c6ee4
commit 59b71d5d05
6 changed files with 26 additions and 26 deletions
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2
src/avr/Makefile
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@ -5,7 +5,7 @@ CROSS_PREFIX=avr-
dirs-y += src/avr lib/pjrc_usb_serial
CFLAGS-y += -Os -mmcu=$(CONFIG_MCU) -DF_CPU=$(CONFIG_CLOCK_FREQ)
CFLAGS-y += -O2 -mmcu=$(CONFIG_MCU) -DF_CPU=$(CONFIG_CLOCK_FREQ)
LDFLAGS-y += -Wl,--relax
# Add avr source files

2
src/avr/timer.c
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@ -153,7 +153,7 @@ timer_periodic(void)
// if the next timer is too close to schedule. Caller must disable
// irqs.
uint8_t
timer_try_set_next(uint32_t target)
timer_try_set_next(unsigned int target)
{
uint16_t next = target;
int16_t diff = next - timer_get();