Test | Estimated completion time | Description |
Random | 45 seconds | Uses |
|
|
|
Block Checkerboard 32 | 15 seconds | Alternates |
|
| 1s and all 0s, and then with all |
|
| 0s and all 1s. |
|
|
|
Bit Checkerboard 32 | 15 seconds | Alternates bits with all 1s and |
|
| all 0s, and then with all 0s and |
|
| all 1s. |
|
|
|
Sequential Byte Block 32 | 32 minutes | Fills bytes sequentially with |
|
| patterns starting at 0x00 and |
|
| ending at 0xFF. |
|
|
|
Walking One 32 | 15 minutes | Walks 1s up and down memory. |
|
|
|
Walking Zero 32 | 15 minutes | Walks 0s up and down memory. |
|
|
|
Walking Spread Bit 32 | 15 minutes | Walks 0b01 up and then walks |
|
| 0b10 down memory. |
|
|
|
Walking Bit Flip 32 | 15 minutes | Alternates words with walking |
|
| 1 and walking 0, and then |
|
| alternates with walking 0 and |
|
| walking 1. |
|
|
|
Multicore Memory Tests
In Server Diagnostics EFI, all memory tests (simple, multicore, and extended) are grouped under Memory tests.
Note: The time required to complete memory tests correlates to the amount of memory being tested. These estimates are based on testing 8 GB of memory.
Test | Estimated completion time | Description |
MP Block Checkerboard | 10 seconds | Alternates |
|
| 1s and all 0s, and then with all |
|
| 0s and all 1s. |
|
|
|
MP Bit Checkerboard | 10 seconds | Alternates bits with all 1s and |
|
| all 0s, and then with all 0s and |
|
| all 1s. |
|
|
|
MP Sequential Byte Block | 16 minutes | Fills bytes sequentially with |
|
| patterns starting at 0x00 and |
|
| ending at 0xFF. |
|
|
|
MP Walking One | 7 minutes | Walks 1s up and down memory. |
|
|
|
MP Walking Zero | 7 minutes | Walks 0s up and down memory. |
|
|
|
MP Walking Spread Bit | 7 minutes | Walks 0b01 up and then walks |
|
| 0b10 down memory. |
|
|
|
Appendix Server Diagnostics Test Reference
41
