What exactly is a P-state? (Pt. 1)



A P-state is a voltage and frequency operating point





What is a P-state?

When someone refers to a P-state, generally only the frequency is talked about. For example, on my Intel® Core™ processor, P0 is 2.3 GHz, and P1 is 980 MHz. In truth, a P-state is both a frequency and voltage operating point. Both are scaled as the P-state increases. 






C-states and P-states are very different

C-states are idle states and P-states are operational states. This difference, though obvious once you know, can be initially confusing.

With the exception of C0, where the CPU is active and busy doing something, a C-state is an idle state. Since an idle CPU isn't doing anything (i.e. any useful work), why not shut it down? No one is going to notice since there's no one using it. (Letting a CPU run at full bore when idle is like driving in circles very fast; all you're doing is going nowhere quickly.)

Android emulator without KVM

Hello everyone,

I just started to lean android on Linux platform 32 bit OS. I installed android sdk and eclipse. But Android emulator is not working.

There is a message "KVM is not installed/properly installed" when launching android emulator. I checked evrything. And I found that my hardware configuration doesn't support hardware virtualisation Intel x86 Atom Processor codename "Pineview". Hence unable to install KVM and therefore unable to launch android emulator.

Is there any way I could work without KVM?

HAXM silently crashing on OS X 10.9.5

Installed latest version of HAXM manually on 10.9.5 with latest version of Android Studio.

Total time: 14 seconds
Built the following apk(s):
WARNING : no emulator specified, defaulting to Tab_S_style
Waiting for emulator...
HAX is working and emulator runs in fast virt mode

There's nothing logged in the console/system logs at all.

Application won't install (it used to)

Hi, I published an app to the Google Play store using Construct 2 and Intel XDK. I recently wanted to update the app and when trying to test on my device, it won't let me install the latest build (Crosswalk for Android). I tried clearing my cache, uninstalling the game, a previous build, another device and then finally tried a completely different apk. Any idea what might be wrong? I am using AdMob which was part of the problem I had before, but I even tried completely deleting AdMob from my game and I still can't install it.

engineering tools for working with images firmware for z2580

Dear Intel engineers. On behalf of the Russian language, Indonesian communities ask you to put utilities for signing your phone is on the processor Z2580. Just for the next generation after 2580, you have posted engineering tools, and for the old no. Thank U.

Desktop gets shifted horizontally on Intel BayTrail, ASUS Transformer Pad TF103

Dear all,

while testing my app on the Atom Z3745, the screen suddenly got rotated right by a few hundred pixels. The pixels shifted out on the right side were displayed on the left side, but one pixel line lower.

This screen rotation problem was not related to my app, it persisted on the Android desktop after exiting my app.

The solution was to press the on/off button twice, then the desktop was OK again.

Since this shift could be an issue in the graphics driver, I'm reporting it here.

The problem appeared randomly twice this evening.


OpenGL/ES texture format GL_BGRA broken in Intel BayTrail Android Driver

Dear all,

I tested my app on Android 4.4 with Intel(R) HD Graphics for BayTrail , OpenGL ES-CM 1.1, and unfortunately no textures were shown at all.

I now tracked down the problem: Even though the Intel BayTrail driver reports to support the extension GL_EXT_texture_format_BGRA8888, using glTexImage2D with format GL_BGRA seems to create a mess, so that no more textures are displayed at all. All is fine if GL_RGBA is used instead.

Test system was an Asus Transformer Pad TF103C.

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