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PM: QoS: Get rid of unused flags
The network_latency and network_throughput flags for PM-QoS have not
found much use in drivers or in userspace since they were introduced.
Commit 4a733ef1be
("mac80211: remove PM-QoS listener") removed the
only user PM_QOS_NETWORK_LATENCY in the kernel a while ago and there
don't seem to be any userspace tools using the character device files
either.
PM_QOS_MEMORY_BANDWIDTH was never even added to the trace events.
Remove all the flags except cpu_dma_latency.
Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
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d1abaeb3be
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@ -7,8 +7,7 @@ performance expectations by drivers, subsystems and user space applications on
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one of the parameters.
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Two different PM QoS frameworks are available:
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1. PM QoS classes for cpu_dma_latency, network_latency, network_throughput,
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memory_bandwidth.
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1. PM QoS classes for cpu_dma_latency
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2. the per-device PM QoS framework provides the API to manage the per-device latency
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constraints and PM QoS flags.
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@ -79,7 +78,7 @@ cleanup of a process, the interface requires the process to register its
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parameter requests in the following way:
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To register the default pm_qos target for the specific parameter, the process
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must open one of /dev/[cpu_dma_latency, network_latency, network_throughput]
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must open /dev/cpu_dma_latency
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As long as the device node is held open that process has a registered
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request on the parameter.
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@ -13,9 +13,6 @@
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enum {
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PM_QOS_RESERVED = 0,
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PM_QOS_CPU_DMA_LATENCY,
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PM_QOS_NETWORK_LATENCY,
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PM_QOS_NETWORK_THROUGHPUT,
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PM_QOS_MEMORY_BANDWIDTH,
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/* insert new class ID */
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PM_QOS_NUM_CLASSES,
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@ -33,9 +30,6 @@ enum pm_qos_flags_status {
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#define PM_QOS_LATENCY_ANY_NS ((s64)PM_QOS_LATENCY_ANY * NSEC_PER_USEC)
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#define PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC)
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#define PM_QOS_NETWORK_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC)
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#define PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE 0
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#define PM_QOS_MEMORY_BANDWIDTH_DEFAULT_VALUE 0
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#define PM_QOS_RESUME_LATENCY_DEFAULT_VALUE PM_QOS_LATENCY_ANY
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#define PM_QOS_RESUME_LATENCY_NO_CONSTRAINT PM_QOS_LATENCY_ANY
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#define PM_QOS_RESUME_LATENCY_NO_CONSTRAINT_NS PM_QOS_LATENCY_ANY_NS
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@ -379,9 +379,7 @@ DECLARE_EVENT_CLASS(pm_qos_request,
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TP_printk("pm_qos_class=%s value=%d",
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__print_symbolic(__entry->pm_qos_class,
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{ PM_QOS_CPU_DMA_LATENCY, "CPU_DMA_LATENCY" },
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{ PM_QOS_NETWORK_LATENCY, "NETWORK_LATENCY" },
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{ PM_QOS_NETWORK_THROUGHPUT, "NETWORK_THROUGHPUT" }),
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{ PM_QOS_CPU_DMA_LATENCY, "CPU_DMA_LATENCY" }),
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__entry->value)
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);
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@ -426,9 +424,7 @@ TRACE_EVENT(pm_qos_update_request_timeout,
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TP_printk("pm_qos_class=%s value=%d, timeout_us=%ld",
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__print_symbolic(__entry->pm_qos_class,
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{ PM_QOS_CPU_DMA_LATENCY, "CPU_DMA_LATENCY" },
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{ PM_QOS_NETWORK_LATENCY, "NETWORK_LATENCY" },
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{ PM_QOS_NETWORK_THROUGHPUT, "NETWORK_THROUGHPUT" }),
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{ PM_QOS_CPU_DMA_LATENCY, "CPU_DMA_LATENCY" }),
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__entry->value, __entry->timeout_us)
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);
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@ -78,57 +78,9 @@ static struct pm_qos_object cpu_dma_pm_qos = {
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.name = "cpu_dma_latency",
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};
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static BLOCKING_NOTIFIER_HEAD(network_lat_notifier);
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static struct pm_qos_constraints network_lat_constraints = {
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.list = PLIST_HEAD_INIT(network_lat_constraints.list),
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.target_value = PM_QOS_NETWORK_LAT_DEFAULT_VALUE,
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.default_value = PM_QOS_NETWORK_LAT_DEFAULT_VALUE,
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.no_constraint_value = PM_QOS_NETWORK_LAT_DEFAULT_VALUE,
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.type = PM_QOS_MIN,
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.notifiers = &network_lat_notifier,
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};
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static struct pm_qos_object network_lat_pm_qos = {
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.constraints = &network_lat_constraints,
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.name = "network_latency",
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};
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static BLOCKING_NOTIFIER_HEAD(network_throughput_notifier);
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static struct pm_qos_constraints network_tput_constraints = {
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.list = PLIST_HEAD_INIT(network_tput_constraints.list),
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.target_value = PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE,
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.default_value = PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE,
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.no_constraint_value = PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE,
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.type = PM_QOS_MAX,
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.notifiers = &network_throughput_notifier,
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};
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static struct pm_qos_object network_throughput_pm_qos = {
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.constraints = &network_tput_constraints,
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.name = "network_throughput",
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};
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static BLOCKING_NOTIFIER_HEAD(memory_bandwidth_notifier);
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static struct pm_qos_constraints memory_bw_constraints = {
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.list = PLIST_HEAD_INIT(memory_bw_constraints.list),
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.target_value = PM_QOS_MEMORY_BANDWIDTH_DEFAULT_VALUE,
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.default_value = PM_QOS_MEMORY_BANDWIDTH_DEFAULT_VALUE,
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.no_constraint_value = PM_QOS_MEMORY_BANDWIDTH_DEFAULT_VALUE,
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.type = PM_QOS_SUM,
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.notifiers = &memory_bandwidth_notifier,
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};
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static struct pm_qos_object memory_bandwidth_pm_qos = {
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.constraints = &memory_bw_constraints,
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.name = "memory_bandwidth",
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};
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static struct pm_qos_object *pm_qos_array[] = {
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&null_pm_qos,
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&cpu_dma_pm_qos,
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&network_lat_pm_qos,
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&network_throughput_pm_qos,
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&memory_bandwidth_pm_qos,
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};
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static ssize_t pm_qos_power_write(struct file *filp, const char __user *buf,
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