[PATCH 4/4] omap: cpu: Power tracking support for cgroup cpuacct
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From: Mike Chan on 18 May 2010 21:40 Specify new power field in struct omap_opp, which is power exported in milliWatt. power_usage function gives power consumed in milliWatt seconds Signed-off-by: Mike Chan <mike(a)android.com> --- arch/arm/plat-omap/cpu-omap.c | 23 ++++++++++++++++++++++- arch/arm/plat-omap/include/plat/omap-pm.h | 1 + 2 files changed, 23 insertions(+), 1 deletions(-) diff --git a/arch/arm/plat-omap/cpu-omap.c b/arch/arm/plat-omap/cpu-omap.c index d27234d..1381539 100644 --- a/arch/arm/plat-omap/cpu-omap.c +++ b/arch/arm/plat-omap/cpu-omap.c @@ -22,6 +22,7 @@ #include <linux/clk.h> #include <linux/io.h> #include <linux/cpuacct.h> +#include <linux/math64.h> #include <mach/hardware.h> #include <plat/clock.h> @@ -218,10 +219,30 @@ static void omap_cpuacct_freq_show(void *cpuacct_data, struct cgroup_map_cb *cb) } } + +/* Returns power (in milliWatt seconds) for cgroup */ +static u64 omap_cpuacct_power_usage(void *cpuacct_data) +{ + int i; + u64 *cpuacct_freq = cpuacct_data; + u64 totalpower = 0; + + /* mpu_opps table starts at 1 */ + for (i = 0; freq_table[i].frequency != CPUFREQ_TABLE_END; i++) + totalpower += cpuacct_freq[i] * mpu_opps[i + 1].power; + + /* milliwatt seconds */ + totalpower = div64_u64(totalpower, NSEC_PER_SEC); + + return totalpower; +} + + static struct cpuacct_cpufreq_calls omap_cpuacct_cpufreq = { .init = omap_cpuacct_freq_init, .charge = omap_cpuacct_freq_charge, - .show = omap_cpuacct_freq_show, + .cpufreq_show = omap_cpuacct_freq_show, + .power_usage = omap_cpuacct_power_usage, }; static int __init omap_cpuacct_init(void) diff --git a/arch/arm/plat-omap/include/plat/omap-pm.h b/arch/arm/plat-omap/include/plat/omap-pm.h index 3ee41d7..8f2db6f 100644 --- a/arch/arm/plat-omap/include/plat/omap-pm.h +++ b/arch/arm/plat-omap/include/plat/omap-pm.h @@ -31,6 +31,7 @@ struct omap_opp { unsigned long rate; u8 opp_id; u16 min_vdd; + unsigned long power; /* power consumed running at OPP in milliWatts */ }; extern struct omap_opp *mpu_opps; -- 1.7.0.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |