This patch adds the cyclic command, which currently only supports the 'list' subcommand, to list all currently registered cyclic functions. Here an example:
=> cyclic list function: cyclic_demo, cpu-time: 7010 us, frequency: 99.80 times/s function: cyclic_demo2, cpu-time: 1 us, frequency: 1.13 times/s
As you can see, the cpu-time is accounted, so that cyclic functions that take too long might be discovered. Additionally the frequency is logged.
Signed-off-by: Stefan Roese sr@denx.de --- MAINTAINERS | 1 + cmd/Kconfig | 6 ++++++ cmd/Makefile | 1 + cmd/cyclic.c | 40 ++++++++++++++++++++++++++++++++++++++++ 4 files changed, 48 insertions(+) create mode 100644 cmd/cyclic.c
diff --git a/MAINTAINERS b/MAINTAINERS index 920f515dd555..e0f5bf83a953 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -755,6 +755,7 @@ F: doc/arch/m68k.rst CYCLIC M: Stefan Roese sr@denx.de S: Maintained +F: cmd/cyclic.c F: common/cyclic.c F: include/cyclic.h
diff --git a/cmd/Kconfig b/cmd/Kconfig index 69c1814d24af..cb9bd0d6692a 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -2456,6 +2456,12 @@ config CMD_CBSYSINFO memory by coreboot before jumping to U-Boot. It can be useful for debugging the beaaviour of coreboot or U-Boot.
+config CMD_CYCLIC + bool "cyclic - Show information about cyclic functions" + help + This enables the 'cyclic' command which provides information about + cyclic excution functions. + config CMD_DIAG bool "diag - Board diagnostics" help diff --git a/cmd/Makefile b/cmd/Makefile index 5e43a1e022e8..c5a4fc5a5cfc 100644 --- a/cmd/Makefile +++ b/cmd/Makefile @@ -56,6 +56,7 @@ obj-$(CONFIG_CMD_DIAG) += diag.o endif obj-$(CONFIG_CMD_ADTIMG) += adtimg.o obj-$(CONFIG_CMD_ABOOTIMG) += abootimg.o +obj-$(CONFIG_CMD_CYCLIC) += cyclic.o obj-$(CONFIG_CMD_EVENT) += event.o obj-$(CONFIG_CMD_EXTENSION) += extension_board.o obj-$(CONFIG_CMD_ECHO) += echo.o diff --git a/cmd/cyclic.c b/cmd/cyclic.c new file mode 100644 index 000000000000..1714db18e480 --- /dev/null +++ b/cmd/cyclic.c @@ -0,0 +1,40 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * A general-purpose cyclic execution infrastructure, to allow "small" + * (run-time wise) functions to be executed at a specified frequency. + * Things like LED blinking or watchdog triggering are examples for such + * tasks. + * + * Copyright (C) 2022 Stefan Roese sr@denx.de + */ + +#include <common.h> +#include <command.h> +#include <cyclic.h> + +extern struct list_head cyclic_list; + +static int do_cyclic_list(struct cmd_tbl *cmdtp, int flag, int argc, + char *const argv[]) +{ + struct cyclic_struct *cyclic, *tmp; + uint64_t cnt, freq; + + list_for_each_entry_safe(cyclic, tmp, &cyclic_list, list) { + cnt = cyclic->run_cnt * 1000000ULL * 100ULL; + freq = cnt / (timer_get_us() - cyclic->start_time_us); + printf("function: %s, cpu-time: %lld us, frequency: %lld.%02lld times/s\n", + cyclic->name, cyclic->cpu_time_us, + freq / 100, freq % 100); + } + + return 0; +} + +#ifdef CONFIG_SYS_LONGHELP +static char cyclic_help_text[] = + "cyclic list - list cyclic functions"; +#endif + +U_BOOT_CMD_WITH_SUBCMDS(cyclic, "Cyclic", cyclic_help_text, + U_BOOT_SUBCMD_MKENT(list, 1, 1, do_cyclic_list));