diff options
| author | Jonas Aaberg <jonas.aberg@stericsson.com> | 2010-06-30 14:00:40 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@stericsson.com> | 2011-09-19 15:15:40 +0200 |
| commit | 0d7f77947a00d7a4deb6146f6b9276cf6762ec2f (patch) | |
| tree | 9da3a89a53eeb300379fc8e7ef8df293ef042c33 /arch/arm/common | |
| parent | 46c47211b0ea19c796b99ebdd8239b2ac46c3f9e (diff) | |
Boottime - A tool for automatic measurement of kernel and possible boot loader boot time.
The overhead is very low and the results will be found under sysfs/bootime, as well as
detailed results in debugfs under boottime/. The bootgraph* files are compatible with
scripts/bootgraph.pl. The reason for this patch is to provide data (sysfs/boottime)
suitable for automatic testcases as well as help for developers to reduce the boot
time (debugfs).
Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/2760
Change-Id: Id8ea7226b3f1f783448962195193b90699d32fc6
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/3174
Tested-by: Mian Yousaf KAUKAB <mian.yousaf.kaukab@stericsson.com>
Reviewed-by: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com>
Signed-off-by: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'arch/arm/common')
| -rw-r--r-- | arch/arm/common/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/common/boottime.c | 46 |
2 files changed, 47 insertions, 0 deletions
diff --git a/arch/arm/common/Makefile b/arch/arm/common/Makefile index 6ea9b6f3607..86d67017c1e 100644 --- a/arch/arm/common/Makefile +++ b/arch/arm/common/Makefile @@ -17,3 +17,4 @@ obj-$(CONFIG_ARCH_IXP2000) += uengine.o obj-$(CONFIG_ARCH_IXP23XX) += uengine.o obj-$(CONFIG_PCI_HOST_ITE8152) += it8152.o obj-$(CONFIG_ARM_TIMER_SP804) += timer-sp.o +obj-$(CONFIG_BOOTTIME) += boottime.o diff --git a/arch/arm/common/boottime.c b/arch/arm/common/boottime.c new file mode 100644 index 00000000000..73e9e04ed37 --- /dev/null +++ b/arch/arm/common/boottime.c @@ -0,0 +1,46 @@ +/* + * Copyright (C) ST-Ericsson SA 2009-2010 + * + * Author: Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson + * + * License terms: GNU General Public License (GPL) version 2 + * + * Store boot times measured during for example u-boot startup. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/boottime.h> +#include <linux/string.h> +#include <asm/setup.h> + +static u32 bootloader_idle; +static u32 bootloader_total; + +static int __init boottime_parse_tag(const struct tag *tag) +{ + int i; + char buff[BOOTTIME_MAX_NAME_LEN]; + + bootloader_idle = tag->u.boottime.idle; + bootloader_total = tag->u.boottime.total; + + for (i = 0; i < tag->u.boottime.num; i++) { + snprintf(buff, BOOTTIME_MAX_NAME_LEN, "%s+0x0/0x0", + tag->u.boottime.entry[i].name); + buff[BOOTTIME_MAX_NAME_LEN - 1] = '\0'; + boottime_mark_wtime(buff, tag->u.boottime.entry[i].time); + } + + return 0; +} + +__tagtable(ATAG_BOOTTIME, boottime_parse_tag); + +int boottime_bootloader_idle(void) +{ + if (bootloader_total == 0) + return 0; + + return (int) ((bootloader_idle) / (bootloader_total / 100)); +} |