From: Fenghua Yu <fenghua.yu@intel.com>
To: "Shuah Khan" <shuah@kernel.org>,
"Reinette Chatre" <reinette.chatre@intel.com>,
"Tony Luck" <tony.luck@intel.com>,
"Babu Moger" <babu.moger@amd.com>,
"James Morse" <james.morse@arm.com>,
"Borislav Petkov" <bp@alien8.de>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Ravi V Shankar" <ravi.v.shankar@intel.com>
Cc: "linux-kselftest" <linux-kselftest@vger.kernel.org>,
"linux-kernel" <linux-kernel@vger.kernel.org>,
Fenghua Yu <fenghua.yu@intel.com>
Subject: [PATCH v3 08/21] selftests/resctrl: Ensure sibling CPU is not same as original CPU
Date: Tue, 20 Oct 2020 23:51:13 +0000 [thread overview]
Message-ID: <20201020235126.1871815-9-fenghua.yu@intel.com> (raw)
In-Reply-To: <20201020235126.1871815-1-fenghua.yu@intel.com>
From: Reinette Chatre <reinette.chatre@intel.com>
The resctrl tests can accept a CPU on which the tests are run and use
default of CPU #1 if it is not provided. In the CAT test a "sibling CPU"
is determined that is from the same package where another thread will be
run.
The current algorithm with which a "sibling CPU" is determined does not
take the provided/default CPU into account and when that CPU is the
first CPU in a package then the "sibling CPU" will be selected to be the
same CPU since it starts by picking the first CPU from core_siblings_list.
Fix the "sibling CPU" selection by taking the provided/default CPU into
account and ensuring a sibling that is a different CPU is selected.
Fixes: 78941183d1b1 ("selftests/resctrl: Add Cache QoS Monitoring (CQM) selftest")
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
---
tools/testing/selftests/resctrl/resctrlfs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/resctrl/resctrlfs.c b/tools/testing/selftests/resctrl/resctrlfs.c
index 67d775d03271..05956319d9ce 100644
--- a/tools/testing/selftests/resctrl/resctrlfs.c
+++ b/tools/testing/selftests/resctrl/resctrlfs.c
@@ -268,7 +268,7 @@ int get_core_sibling(int cpu_no)
while (token) {
sibling_cpu_no = atoi(token);
/* Skipping core 0 as we don't want to run test on core 0 */
- if (sibling_cpu_no != 0)
+ if (sibling_cpu_no != 0 && sibling_cpu_no != cpu_no)
break;
token = strtok(NULL, "-,");
}
--
2.29.0
next prev parent reply other threads:[~2020-10-20 23:51 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-20 23:51 [PATCH v3 00/21] Miscellaneous fixes for resctrl selftests Fenghua Yu
2020-10-20 23:51 ` [PATCH v3 01/21] selftests/resctrl: Rename CQM test as CMT test Fenghua Yu
2020-10-27 20:55 ` Shuah Khan
2020-10-20 23:51 ` [PATCH v3 02/21] selftests/resctrl: Fix typo Fenghua Yu
2020-10-27 20:56 ` Shuah Khan
2020-10-20 23:51 ` [PATCH v3 03/21] selftests/resctrl: Fix typo in help text Fenghua Yu
2020-10-27 20:58 ` Shuah Khan
2020-10-20 23:51 ` [PATCH v3 04/21] selftests/resctrl: Declare global variables as extern Fenghua Yu
2020-10-20 23:51 ` [PATCH v3 05/21] selftests/resctrl: Return if resctrl file system is not supported Fenghua Yu
2020-10-27 21:34 ` Shuah Khan
2020-10-20 23:51 ` [PATCH v3 06/21] selftests/resctrl: Check for resctrl mount point only if resctrl FS is supported Fenghua Yu
2020-10-20 23:51 ` [PATCH v3 07/21] selftests/resctrl: Use resctrl/info for feature detection Fenghua Yu
2020-10-20 23:51 ` Fenghua Yu [this message]
2020-10-20 23:51 ` [PATCH v3 09/21] selftests/resctrl: Fix missing options "-n" and "-p" Fenghua Yu
2020-10-20 23:51 ` [PATCH v3 10/21] selftests/resctrl: Fix MBA/MBM results reporting format Fenghua Yu
2020-10-20 23:51 ` [PATCH v3 11/21] selftests/resctrl: Abort running tests if not root user Fenghua Yu
2020-10-20 23:51 ` [PATCH v3 12/21] selftests/resctrl: Enable gcc checks to detect buffer overflows Fenghua Yu
2020-10-20 23:51 ` [PATCH v3 13/21] selftests/resctrl: Don't hard code value of "no_of_bits" variable Fenghua Yu
2020-10-20 23:51 ` [PATCH v3 14/21] selftests/resctrl: Modularize resctrl test suite main() function Fenghua Yu
2020-10-20 23:51 ` [PATCH v3 15/21] selftests/resctrl: Skip the test if requested resctrl feature is not supported Fenghua Yu
2020-10-20 23:51 ` [PATCH v3 16/21] selftests/resctrl: Umount resctrl FS only if mounted Fenghua Yu
2020-10-20 23:51 ` [PATCH v3 17/21] selftests/resctrl: Unmount resctrl FS after running all tests Fenghua Yu
2020-10-20 23:51 ` [PATCH v3 18/21] selftests/resctrl: Fix incorrect parsing of iMC counters Fenghua Yu
2020-10-20 23:51 ` [PATCH v3 19/21] selftests/resctrl: Fix checking for < 0 for unsigned values Fenghua Yu
2020-10-20 23:51 ` [PATCH v3 20/21] selftests/resctrl: Fix unnecessary usage of global variables Fenghua Yu
2020-10-20 23:51 ` [PATCH v3 21/21] selftests/resctrl: Don't use global variable for capacity bitmask (CBM) Fenghua Yu
2020-10-28 0:46 ` [PATCH v3 00/21] Miscellaneous fixes for resctrl selftests Shuah Khan
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