mirror of
https://github.com/zephyrproject-rtos/zephyr
synced 2025-09-02 03:22:30 +00:00
6209218f40
Some tick frequencies lend themselves to optimized conversions from ms to ticks and vice-versa. - 1000Hz which does not need any conversion - 500Hz, 250Hz, 125Hz where the division/multiplication are a straight shift since they are power-of-two factors of 1000. In addition, some more generally used values are made to use optimized conversion equations rather than the generic one that uses 64-bit math, and often results in calling compiler intrinsics. These values are: 100Hz, 50Hz, 25Hz, 20Hz, 10Hz, 1Hz (the last one used in some testing). Avoiding the 64-bit math intrisics has the additional benefit, in addition to increased performance, of using a significant lower amount of stack space: 52 bytes on ARM Cortex-M and 80 bytes on x86. Change-Id: I080eb338a2637d6b1c6838c119af1a9fa37fe869 Signed-off-by: Benjamin Walsh <benjamin.walsh@windriver.com> |
||
|---|---|---|
| .. | ||
| configs | ||
| include | ||
| alert.c | ||
| atomic_c.c | ||
| compiler_stack_protect.c | ||
| device.c | ||
| errno.c | ||
| event_logger.c | ||
| fifo.c | ||
| idle.c | ||
| init.c | ||
| int_latency_bench.c | ||
| Kconfig | ||
| Kconfig.event_logger | ||
| Kconfig.power_mgmt | ||
| kernel_event_logger.c | ||
| legacy_offload.c | ||
| legacy_timer.c | ||
| lifo.c | ||
| mailbox.c | ||
| Makefile | ||
| mem_pool.c | ||
| mem_slab.c | ||
| msg_q.c | ||
| mutex.c | ||
| pipes.c | ||
| sched.c | ||
| sem.c | ||
| stack.c | ||
| sys_clock.c | ||
| system_work_q.c | ||
| thread_abort.c | ||
| thread.c | ||
| timer.c | ||
| version.c | ||
| work_q.c | ||