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Among its main features, HSA defines a unified virtual address space for compute devices: where GPUs traditionally have their own memory, separate from the main (CPU) memory, HSA requires these devices to share page tables so that devices can exchange data by sharing pointers. This is to be supported by custom memory management units.
Low-memory devices, however, are still permitted to use jemalloc. [7] Some 64-bit devices, like the Nexus 9, are effectively low-memory devices because of the extra space requirements of 64-bit pointers and hosting of two zygotes. (Zygote is an Android system service that is the parent of all Android application processes. [8])
The minimum cache size is 250 MB. In Vista or with FAT32 formatting of the drive, the maximum is 4 GB. In Windows 7 or later with NTFS or exFAT formatting, the maximum cache size is 32 GB per device. Windows Vista allows only one device to be used, while Windows 7 allows multiple caches, one per device, up to a total of 256 GB. [5]
In February 2013, semiconductor company Toshiba Memory (now Kioxia) started shipping samples of a 64 GB NAND flash chip, the first chip to support the then new UFS standard. [ 20 ] In April 2015, Samsung's Galaxy S6 family was the first phone to ship with eUFS storage using the UFS 2.0 standard.
Universal memory refers to a computer data storage device combining the cost benefits of DRAM, the speed of SRAM, the non-volatility of flash memory along with infinite durability, and longevity. Such a device, if it ever becomes possible to develop, would have a far-reaching impact on the computer market.
The project states that its intention is to drive Android support and innovation on Intel Architecture in addition to providing a venue for collaboration. [16] It re-used the drm_gralloc graphics HAL module from Android-x86 in order to support Intel HD Graphics hardware. Back as Android-IA, it provided a FAQ [17] with more detailed information.
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Unified Memory Access is not a valid term, but is often used mistakenly when referring to: Uniform Memory Access , a computer memory architecture used in parallel computers Unified Memory Architecture , a technology that allows a graphics processing unit to share system memory