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| author | Tomeu Vizoso <tomeu.vizoso@collabora.com> | 2014-09-03 17:49:32 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-09-25 01:18:33 +0200 |
| commit | 7990da71ebfa887ae6fe4464ab0d99ddeb8efacc (patch) | |
| tree | 26f0b2b19119485b309fa35121872cd7bac0a62e /Documentation/power | |
| parent | 0f33be009b89d2268e94194dc4fd01a7851b6d51 (diff) | |
| download | lwn-7990da71ebfa887ae6fe4464ab0d99ddeb8efacc.tar.gz lwn-7990da71ebfa887ae6fe4464ab0d99ddeb8efacc.zip | |
PM / QoS: Add PM_QOS_MEMORY_BANDWIDTH class
Also adds a class type PM_QOS_SUM that aggregates the values by summing them.
It can be used by memory controllers to calculate the optimum clock frequency
based on the bandwidth needs of the different memory clients.
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'Documentation/power')
| -rw-r--r-- | Documentation/power/pm_qos_interface.txt | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/power/pm_qos_interface.txt b/Documentation/power/pm_qos_interface.txt index a5da5c7e7128..129f7c0e1483 100644 --- a/Documentation/power/pm_qos_interface.txt +++ b/Documentation/power/pm_qos_interface.txt @@ -5,7 +5,8 @@ performance expectations by drivers, subsystems and user space applications on one of the parameters. Two different PM QoS frameworks are available: -1. PM QoS classes for cpu_dma_latency, network_latency, network_throughput. +1. PM QoS classes for cpu_dma_latency, network_latency, network_throughput, +memory_bandwidth. 2. the per-device PM QoS framework provides the API to manage the per-device latency constraints and PM QoS flags. @@ -13,6 +14,7 @@ Each parameters have defined units: * latency: usec * timeout: usec * throughput: kbs (kilo bit / sec) + * memory bandwidth: mbs (mega bit / sec) 1. PM QoS framework |