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Old September 21st, 2012, 11:27 PM   #1 (permalink)
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Question Gingerbread doesn't use both cores of the cpu??? Then my app is lying.

I've heard it from more than one source that the gingerbread OS doesn't utilize both cores.

I have an installed called "System Panel"

It says different!

If I go into menu/monitoring and move the screen up and down really fast to put a load on the phone, the first core lights up and the second core then kicks in.

Is this BS?

It does show the core usage in real time. If I just leave the phone sit, the second core goes to sleep.

Wutcha think?

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Old September 21st, 2012, 11:29 PM   #2 (permalink)
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Of course it uses both cores. Otherwise it wouldn't he a dual core phone

Based on what you posted your phone is operating normally
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Old September 22nd, 2012, 12:41 PM   #3 (permalink)
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Gingerbread as the operating system isn't programmed to use multiple cores, but there are plenty of apps that use multiple cores. So whatever app your using knows how to use both and thats what your seeing.

When you move up to ICS multiple core use is built into the OS so you should see some performance improvements.
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Old September 22nd, 2012, 11:17 PM   #4 (permalink)
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This is because of the default mot_hotplug CPU governor.

Whenever the phone isn't doing anything hard, the second CPU isn't turned on. That saves a good amount of energy. When the phone starts to do something more process intensive, then the governor meets the requirements to turn on the second core.

From the the Android CPU governors explained thread on these forums:

21: Hotplug Governor:
The Hotplug governor performs very similarly to the OnDemand governor, with the added benefit of being more precise about how it steps down through the kernel's frequency table as the governor measures the user's CPU load. However, the Hotplug governor's defining feature is its ability to turn unused CPU cores off during periods of low CPU utilization. This is known as "hotplugging."
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Old September 24th, 2012, 02:17 AM   #5 (permalink)
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Hotplug or not, though,the core of Android's GB system is not truly made for using dual cores.

xda-developers - View Single Post - Gingerbread doesnt make use of Dual Core?

For a more in-depth read, read the whole thread....
Gingerbread doesnt make use of Dual Core? - xda-developers
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When the Motorola Droid Bionic was first announced at CES 2011, it featured a 4.3-inch qHD display, NVIDIA Tegra 2 dual-core processor clocked at 1GHz, and support for Verizon's 4G LTE high-speed network. After the handset was delayed, Motorola... Read More

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