linux/tools/testing
Fenghua Yu 726d3185b8 selftests/resctrl: Fix incorrect parsing of iMC counters
[ Upstream commit d81343b5ee ]

iMC (Integrated Memory Controller) counters are usually at
"/sys/bus/event_source/devices/" and are named as "uncore_imc_<n>".
num_of_imcs() function tries to count number of such iMC counters so that
it could appropriately initialize required number of perf_attr structures
that could be used to read these iMC counters.

num_of_imcs() function assumes that all the directories under this path
that start with "uncore_imc" are iMC counters. But, on some systems there
could be directories named as "uncore_imc_free_running" which aren't iMC
counters. Trying to read from such directories will result in "not found
file" errors and MBM/MBA tests will fail.

Hence, fix the logic in num_of_imcs() such that it looks at the first
character after "uncore_imc_" to check if it's a numerical digit or not. If
it's a digit then the directory represents an iMC counter, else, skip the
directory.

Reported-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-05-11 14:47:27 +02:00
..
fault-injection
ktest ktest.pl: Fix the logic for truncating the size of the log file for email 2020-12-21 13:30:06 +01:00
kunit kunit: tool: Fix a python tuple typing error 2021-04-10 13:36:08 +02:00
nvdimm device-dax: add dis-contiguous resource support 2020-10-13 18:38:28 -07:00
radix-tree idr test suite: Create anchor before launching throbber 2021-04-16 11:43:21 +02:00
scatterlist tools/testing/scatterlist: Fix test to compile and run 2020-11-17 20:02:20 -04:00
selftests selftests/resctrl: Fix incorrect parsing of iMC counters 2021-05-11 14:47:27 +02:00
vsock