From mboxrd@z Thu Jan 1 00:00:00 1970 From: lee.jones@linaro.org (Lee Jones) Date: Thu, 15 Nov 2012 14:37:18 +0000 Subject: [PATCH 1/2] Boottime: A tool for automatic measurement of kernel/bootloader boot time In-Reply-To: References: <1352973847-21605-1-git-send-email-lee.jones@linaro.org> <1352973847-21605-2-git-send-email-lee.jones@linaro.org> Message-ID: <20121115143718.GB14476@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Thu, 15 Nov 2012, Andrew Murray wrote: > On 15 November 2012 10:04, Lee Jones wrote: > > 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 test-cases as > > well as help for developers to reduce the boot time (debugfs). > > > > Based heavily on the original driver by Jonas Aaberg. > > > > > + > > +static LIST_HEAD(boottime_list); > > +static DEFINE_SPINLOCK(boottime_list_lock); > > +static struct boottime_timer boottime_timer; > > +static int num_const_boottime_list; > > +static struct boottime_list const_boottime_list[NUM_STATIC_BOOTTIME_ENTRIES]; > > +static unsigned long time_kernel_done; > > +static unsigned long time_bootloader_done; > > +static bool system_up; > > +static bool boottime_done; > > + > > +int __attribute__((weak)) boottime_arch_startup(void) > > +{ > > + return 0; > > +} > > + > > +int __attribute__((weak)) boottime_bootloader_idle(void) > > +{ > > + return 0; > > +} > > You may wish to use the __weak macro (include/linux/compiler*) instead > of directly using GCC attributes here. Can do, thanks Andy. -- Lee Jones Linaro ST-Ericsson Landing Team Lead Linaro.org ? Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog