kernel/linux.git/tools/testing/selftests/resctrl/fill_buf.c, branch v5.13.1

selftests/resctrl: Clean up resctrl features check

2021-04-02T19:51:36+00:00

Checking resctrl features call strcmp() to compare feature strings (e.g. "mba", "cat" etc). The checkings are error prone and don't have good coding style. Define the constant strings in macros and call strncmp() to solve the potential issues. Suggested-by: Shuah Khan Tested-by: Babu Moger Signed-off-by: Fenghua Yu Signed-off-by: Shuah Khan

selftests/resctrl: fix spelling mistake "Errror" -> "Error"

2020-03-13T19:29:22+00:00

There are two spelling mistakes in error messages. Fix these. Signed-off-by: Colin Ian King Signed-off-by: Shuah Khan

selftests/resctrl: Add Cache Allocation Technology (CAT) selftest

2020-02-11T01:43:07+00:00

Cache Allocation Technology (CAT) selftest allocates a portion of last level cache and starts a benchmark to read each cache line in this portion of cache. Measure the cache misses in perf and the misses should be equal to the number of cache lines in this portion of cache. We don't use CQM to calculate cache usage because some CAT enabled platforms don't have CQM. Co-developed-by: Sai Praneeth Prakhya Signed-off-by: Sai Praneeth Prakhya Co-developed-by: Babu Moger Signed-off-by: Babu Moger Signed-off-by: Fenghua Yu Signed-off-by: Shuah Khan

selftests/resctrl: Add built in benchmark

2020-02-11T01:38:39+00:00

Built-in benchmark fill_buf generates stressful memory bandwidth and cache traffic. Later it will be used as a default benchmark by various resctrl tests such as MBA (Memory Bandwidth Allocation) and MBM (Memory Bandwidth Monitoring) tests. Signed-off-by: Sai Praneeth Prakhya Co-developed-by: Babu Moger Signed-off-by: Babu Moger Co-developed-by: Fenghua Yu Signed-off-by: Fenghua Yu Signed-off-by: Shuah Khan