Boottime is a tool which can be used for full system booting time measurement. Bootloader boot time is passed to the kernel component though ATAGS. The kernel-side driver then uses this information to provide full system boot time diagnostics though debugfs.
Based heavily on the original driver by Jonas Aaberg.
Signed-off-by: Lee Jones lee.jones@linaro.org --- common/Makefile | 1 + common/boottime.c | 146 ++++++++++++++++++++++++++++++++++++++++++++++++++++ include/boottime.h | 86 +++++++++++++++++++++++++++++++ 3 files changed, 233 insertions(+) create mode 100644 common/boottime.c create mode 100644 include/boottime.h
diff --git a/common/Makefile b/common/Makefile index 9e43322..546acbf 100644 --- a/common/Makefile +++ b/common/Makefile @@ -192,6 +192,7 @@ COBJS-$(CONFIG_MODEM_SUPPORT) += modem.o COBJS-$(CONFIG_UPDATE_TFTP) += update.o COBJS-$(CONFIG_USB_KEYBOARD) += usb_kbd.o COBJS-$(CONFIG_CMD_DFU) += cmd_dfu.o +COBJS-$(CONFIG_BOOTTIME) += boottime.o endif
ifdef CONFIG_SPL_BUILD diff --git a/common/boottime.c b/common/boottime.c new file mode 100644 index 0000000..87be467 --- /dev/null +++ b/common/boottime.c @@ -0,0 +1,146 @@ +/* + * Copyright (C) ST-Ericsson SA 2009-2010 + * Jonas Aaberg jonas.aberg@stericsson.com + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include <common.h> +#include <boottime.h> +#include <asm/byteorder.h> +#include <asm/setup.h> + +#ifdef CONFIG_BOOTTIME + +static struct tag_boottime boottime = { + .idle = 0, + .total = 0, +}; + +void boottime_tag(char *name) +{ + if (boottime.num == BOOTTIME_MAX) { + printf("boottime: out of entries!\n"); + return; + } + + strncpy((char *)boottime.entry[boottime.num].name, + name, + BOOTTIME_MAX_NAME_LEN); + boottime.entry[boottime.num].name[BOOTTIME_MAX_NAME_LEN - 1] = '\0'; + boottime.entry[boottime.num].time = get_timer_us(); + + boottime.num++; +} + +struct boottime_entry *boottime_get_entry(unsigned int i) +{ + if (i >= boottime.num) + return NULL; + else + return &boottime.entry[i]; +} + +void boottime_idle_add(unsigned long time) +{ + boottime.idle += time; +} + +unsigned long boottime_idle_done(void) +{ + return get_timer_us(); +} + +unsigned long boottime_idle_get(void) +{ + return boottime.idle; +} + +static int do_boottime(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + unsigned int i; + struct boottime_entry *entry; + + for (i = 0; i < BOOTTIME_MAX; i++) { + entry = boottime_get_entry(i); + if (entry == NULL) + break; + printf("%s: started at %lu ms\n", entry->name, + (unsigned long)entry->time / 1000); + } + printf("idle: %d%% (%d ms)\n", + 100 * (int)boottime_idle_get() / (int)get_timer_us(), + (int)boottime_idle_get() / 1000); + return 0; +} + +static int do_boottime_tag (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + + if (argc < 2) { + cmd_usage(cmdtp); + return 1; + } + boottime_tag(argv[1]); + + return 0; +} + +U_BOOT_CMD( + boottime, 1, 1, do_boottime, + "print boottime info", + "" + " - print boottime tags\n" +); + +U_BOOT_CMD( + boottime_tag, 2, 1, do_boottime_tag, + "boottime tag 'name'", + "" + " - Add a boottime tag at the current time\n" +); + +#else +/* + * Dummy functions when boottime is not enabled. + */ +static int do_boottime_tag (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + return 0; +} + +void boottime_tag(char *name) +{ + +} + +void boottime_idle_add(unsigned long time) +{ + +} + +U_BOOT_CMD( + boottime_tag, 2, 1, do_boottime_tag, + "boottime tag 'name'", + "" + " - NOT ENABLED: Add CONFIG_BOOTIME to your boards configuration" + " file to enable boottime.\n" +); + +#endif + + + diff --git a/include/boottime.h b/include/boottime.h new file mode 100644 index 0000000..58ea314 --- /dev/null +++ b/include/boottime.h @@ -0,0 +1,86 @@ +/* + * Copyright (C) ST-Ericsson SA 2009-2010 + * Jonas Aaberg jonas.aberg@stericsson.com + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#ifndef BOOTTIME_H +#define BOOTTIME_H + +#define BOOTTIME_MAX_NAME_LEN 64 + +struct boottime_entry { + u32 time; /* in us */ + u8 name[BOOTTIME_MAX_NAME_LEN]; +}; + +#ifdef CONFIG_BOOTTIME + +/** + * boottime_tag() + * Add a sample point with a name now. Shall be called before function "name" + * is executed. + * @name: Sample point name. + */ +void boottime_tag(char *name); + +/** + * boottime_get_entry() + * + * Loads a boottime measure point information. + * @i: boottime measurement point entry. + * + * Returns a boottime entry. NULL, if not existing. + */ +struct boottime_entry *boottime_get_entry(unsigned int i); + +/** + * boottime_idle_get() + * + * Returns the amount of time in us that has been spent idling. + */ +unsigned long boottime_idle_get(void); + +/** + * boottime_idle_done() + * + * Returns the total time since start in us. + */ +unsigned long boottime_idle_done(void); + +/** + * boottime_idle_add() + * + * This function shall be added to all delay() functions. + * The delay time input to delay() shall be provided to this + * function as well. It is used to calculate average load + * during boot. + * @time: time in us. + */ +void boottime_idle_add(unsigned long time); + +#else /* CONFIG_BOOTTIME */ + +static inline void boottime_tag(char *name) { return; } +static inline struct boottime_entry *boottime_get_entry(unsigned int i) { return NULL; } +static inline unsigned long boottime_idle_get(void) { return 0; } +static inline unsigned long boottime_idle_done(void) { return 0; } +static inline void boottime_idle_add(unsigned long time) { return; } + +#endif /* CONFIG_BOOTTIME */ + +#endif /* BOOTTIME_H */