Linux Test Tools

Linux Test Tools

http://ltp.sourceforge.net/tooltable.php

Linux Memory Test

Memtester

1) Random value
2) XOR comparison
3) SUB comparison
4) MUL comparison
5) DIV comparison
6) OR comparison
7) AND comparison
8) Sequential Increment
9) Block Sequential
10) Solid Bits
11) Bit Flip
12) Checkerboard
13) Walking Ones / Walking Zeroes

The walking "1"'s (for a byte wide memory) involves writing a binary value "00000001" into the first location in read/write memory. The value is then shifted one position to the left so that the binary value is "00000010". This value is written to the next location in memory. When the "1" is left shifted out of the 8-bit value, the value "00000001" is reused and the left-shifting begins again from there. This pattern of left-shift by one bit then writing the new value to next memory location is repeated until all of the memory is written.

Once all memory is written then the memory is read location by location and compared to the left-shifted pattern originally written.

The walking "0"'s is the same algorithm with the exception that the pattern used begins with a "11111110" written to the first memory location and "11111101" is written to the second location.

This test is intended to uncover data or address bus problems both internal to the memory device as well as external.

14) Bit Spread
A Bit Spread test, to help catch inter-bit dependencies within a word when a 0 bit is caught between two 1 bits, or vice versa.

LMBench

CacheBench

1) memset() from the C library
2) memcpy() from the C library
3) Cache Read
4) Cache Write
5) Cache Read/Modify/Write

STREAM

U-boot Memory Test

Other Test Algorithm:

Self Address

Write the address of the memory to the memory.

March C- Solid Bits

It consists of writing an all-0’s pattern (and all-1’s pattern), then reading all the cells.

March C- Checkerboard

Writes 1’s and 0’s into alternate memory locations in a checkerboard pattern. Wait for several seconds and read. Repeat for complementary patterns.

Walking Ones Left

Walking Ones Right

Walking Zeros Left

Walking Zeros Right

Reference:
1. The March10N/MarchC memory test
2. Fast Accurate Memory Test Suite