Memory (Extended) Tests
Extended memory tests test all available memory.
In AXD EFI tools, all memory tests (simple, multicore, and extended) are grouped under
Memory tests.
Note: The time required to complete memory tests correlates to the size of memory
being tested. These estimates are based on testing 1 GB of memory
Walking Spread Bit 32
5 minutes
Walks 0b01 up and then walks 0b10
down memory
Walking Bit Flip 32
5 minutes
Alternates words with walking 1 and
walking 0, and then alternates with
walking 0 and walking 1
Test
Estimated completion time
Description
Test
Estimated completion time
Description
MP Block Checkerboard 32
5 seconds
Alternates 32-bit words with all 1s and
all 0s, and then with all 0s and all 1s
MP Bit Checkerboard 32
5 seconds
Alternates bits with all 1s and all 0s,
and then with all 0s and all 1s
MP Sequential Byte Block 32
8 minutes
Fills all bytes sequentially with
patterns starting at 0x00 and ending
at 0xFF
MP Walking One 32
2 minutes
Walks 1s up and down memory
MP Walking Zero 32
2 minutes
Walks 0s up and down memory
MP Walking Spread Bit 32
2 minutes
Walks 0b01 up and then walks 0b10
down memory
MP Walking Bit Flip 32
2 minutes
Alternates words with walking 1 and
walking 0, and then alternates words
with walking 0 and walking 1
Test
Estimated completion time
Description
Extended Memory Test P00F
5 seconds
Tests memory using pattern 0. This
fails if an error occurs.
Extended Memory Test P01F
5 seconds
Tests memory using pattern 1. This
fails if an error occurs.
Appendix
AXD Tools Test Reference
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