Jean > -----Original Message----- > From: linux-omap-owner@xxxxxxxxxxxxxxx [mailto:linux-omap- > owner@xxxxxxxxxxxxxxx] On Behalf Of jean.pihet@xxxxxxxxxxxxxx > Sent: Monday, January 24, 2011 7:51 PM > To: Thomas Renninger; linux-omap@xxxxxxxxxxxxxxx > Cc: Jean Pihet > Subject: [PATCH] perf: add OMAP support for the new power events > > From: Jean Pihet <j-pihet@xxxxxx> > > The patch adds the new power management trace points for > the OMAP architecture. > > The trace points are for: > - default idle handler. Since the cpuidle framework is > instrumented in the generic way there is no need to > add trace points in the OMAP specific cpuidle handler; > - cpufreq (DVFS), > - SoC clocks changes (enable, disable, set_rate), > - change of power domains next power states. > > Tested on OMAP3 with suspend/resume, cpuidle, basic DVFS > [....] > diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach- > omap2/powerdomain.c > index eaed0df..e1feb50 100644 > --- a/arch/arm/mach-omap2/powerdomain.c > +++ b/arch/arm/mach-omap2/powerdomain.c > @@ -19,12 +19,15 @@ > #include <linux/list.h> > #include <linux/errno.h> > #include <linux/string.h> > +#include <trace/events/power.h> > + > #include "cm2xxx_3xxx.h" > #include "prcm44xx.h" > #include "cm44xx.h" > #include "prm2xxx_3xxx.h" > #include "prm44xx.h" > > +#include <asm/cpu.h> > #include <plat/cpu.h> > #include "powerdomain.h" > #include "clockdomain.h" > @@ -406,8 +409,11 @@ int pwrdm_set_next_pwrst(struct powerdomain > *pwrdm, u8 pwrst) > pr_debug("powerdomain: setting next powerstate for %s to > %0x\n", > pwrdm->name, pwrst); > > - if (arch_pwrdm && arch_pwrdm->pwrdm_set_next_pwrst) > + if (arch_pwrdm && arch_pwrdm->pwrdm_set_next_pwrst) { > + trace_power_domain_target(pwrdm->name, pwrst, > + smp_processor_id()); > ret = arch_pwrdm->pwrdm_set_next_pwrst(pwrdm, pwrst); > + } > > return ret; > } We need to track the actual power domain transitions as well at hardware level. Can you please look at "pwrdm_pre_transition()" and "pwrdm_post_transition()" This code keep track of it using the next power state and prev-power state. Regards, Santosh -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
