From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Chan Subject: [PATCH 4/4] omap: cpu: Power tracking support for cgroup cpuacct Date: Tue, 18 May 2010 18:30:20 -0700 Message-ID: <1274232620-23003-5-git-send-email-mike@android.com> References: <1274232620-23003-1-git-send-email-mike@android.com> Return-path: In-Reply-To: <1274232620-23003-1-git-send-email-mike@android.com> Sender: linux-kernel-owner@vger.kernel.org Cc: khilman@deeprootsystems.com, menage@google.com, balbir@in.ibm.com, cpufreq@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, Mike Chan List-Id: linux-omap@vger.kernel.org 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 --- 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 #include #include +#include #include #include @@ -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