User Guide

Contents

Window: NC Device States - Platform Power Analysis

To access this window:
Select the Platform Power Analysis viewpoint and click the
NC Device States
sub-tab in the result tab.
Use the
NC Device States
window to:
  • Identify the time spent in D0ix states by each device.
  • Analyze the trend of D0ix state residency over time.
  • Review the percent of time a device spent in a particular D0ix state.
The North complex contains the compute intensive components (for example, video decode, image processing, and others). D0ix states are low-power states used on system on a chip (SoC) platforms.
Platform Power Analysis
viewpoint is available as part of energy analysis. Collecting energy analysis with Intel® SoC Watch is available for target Android*, Windows*, or Linux* devices and provided only with the Intel System Studio. Import and viewing of the Intel SoC Watch results is supported with any version of the VTune
Profiler
.

North Complex Device States Pane

The North Complex Device States pane shows the list of devices in the North complex and displays the sample counts for each device. Click the expand /collapse buttons in the data columns to expand the column and show data for different D0ix states in each device. You can change the unit displayed by right-clicking a data cell and selecting the
Show Data As
option to select an alternate unit. For example, you could select
Show Data As
Percent
to view the percent of collection time a particular device spent in the active state.
A device remaining in the active state (D0i0) can prevent the system from entering a deep sleep state (S0ix). Compare device time spent in the active state with
System Sleep States
or
Graphics C/P State
.

Timeline Pane

The Timeline pane displays the D0ix states of each device at each point when the data was read. Each state is shown in a different color. Use the legend on the right to add or remove D0ix states from the timeline. Hover over a data point to see the percentage of time spent in each state. Zoom in or out on the timeline to view trends in more detail. Filters applied on a timeline in one window are applied on all other windows within the viewpoint. This is useful if you identify an issue on one tab and want to see how the issue impacts the metrics shown on a different tab. The following example shows a zoomed-in view of the result above to show individual data points.

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804