Messages in this thread Patch in this message | | | From | Jonghwa Lee <> | Subject | [PATCH] PM QoS: Add a metric : Bus Throughput. | Date | Wed, 08 Aug 2012 17:14:51 +0900 |
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Bus throughput metric is added to PM QoS in order to control the frequency of memory interfaces and busses with PM QoS.
Signed-off-by: Jonghwa Lee <jonghwa3.lee@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> --- include/linux/pm_qos.h | 2 ++ kernel/power/qos.c | 15 ++++++++++++++- 2 files changed, 16 insertions(+), 1 deletions(-)
diff --git a/include/linux/pm_qos.h b/include/linux/pm_qos.h index 233149c..6db4939 100644 --- a/include/linux/pm_qos.h +++ b/include/linux/pm_qos.h @@ -15,6 +15,7 @@ enum { PM_QOS_CPU_DMA_LATENCY, PM_QOS_NETWORK_LATENCY, PM_QOS_NETWORK_THROUGHPUT, + PM_QOS_BUS_DMA_THROUGHPUT, /* insert new class ID */ PM_QOS_NUM_CLASSES, @@ -26,6 +27,7 @@ enum { #define PM_QOS_NETWORK_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC) #define PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE 0 #define PM_QOS_DEV_LAT_DEFAULT_VALUE 0 +#define PM_QOS_BUS_DMA_THROUGHPUT_DEFAULT_VALUE 0 struct pm_qos_request { struct plist_node node; diff --git a/kernel/power/qos.c b/kernel/power/qos.c index 6a031e6..75322cc 100644 --- a/kernel/power/qos.c +++ b/kernel/power/qos.c @@ -100,12 +100,25 @@ static struct pm_qos_object network_throughput_pm_qos = { .name = "network_throughput", }; +static BLOCKING_NOTIFIER_HEAD(bus_dma_throughput_notifier); +static struct pm_qos_constraints bus_dma_tput_constraints = { + .list = PLIST_HEAD_INIT(bus_dma_tput_constraints.list), + .target_value = PM_QOS_BUS_DMA_THROUGHPUT_DEFAULT_VALUE, + .default_value = PM_QOS_BUS_DMA_THROUGHPUT_DEFAULT_VALUE, + .type = PM_QOS_MAX, + .notifiers = &bus_dma_throughput_notifier, +}; +static struct pm_qos_object bus_dma_throughput_pm_qos = { + .constraints = &bus_dma_tput_constraints, + .name = "bus_dma_throughput", +}; static struct pm_qos_object *pm_qos_array[] = { &null_pm_qos, &cpu_dma_pm_qos, &network_lat_pm_qos, - &network_throughput_pm_qos + &network_throughput_pm_qos, + &bus_dma_throughput_pm_qos, }; static ssize_t pm_qos_power_write(struct file *filp, const char __user *buf, -- 1.7.4.1
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