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authorSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>2020-03-05 14:45:16 -0800
committerAndy Shevchenko <andriy.shevchenko@linux.intel.com>2020-03-20 14:46:20 +0200
commit696691985c3191f2c4c76f09b1c7c5f3ca99d5ed (patch)
tree054cc8cd34f801b4036a948c441da4d250b8f9a4
parent6320c9fb91212bc951b3a2d2cc2fceb1de4aea43 (diff)
tools/power/x86/intel-speed-select: Special handling for CPU 0 online/offline
When "-o" option for force online/offline is used with command: perf-profile set-config-level If the config level calls for CPU 0 online/offline, then call fails as there is special kernel setup required for CPU 0 online/offline and the currently not setup for that. But when call is for online CPU 0, then don't fail. Just warn that this system is not setup for CPU 0 online/offline. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
-rw-r--r--tools/power/x86/intel-speed-select/isst-config.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/tools/power/x86/intel-speed-select/isst-config.c b/tools/power/x86/intel-speed-select/isst-config.c
index 405b03cba248..b8f4846d7c78 100644
--- a/tools/power/x86/intel-speed-select/isst-config.c
+++ b/tools/power/x86/intel-speed-select/isst-config.c
@@ -220,8 +220,14 @@ static void set_cpu_online_offline(int cpu, int state)
"/sys/devices/system/cpu/cpu%d/online", cpu);
fd = open(buffer, O_WRONLY);
- if (fd < 0)
+ if (fd < 0) {
+ if (!cpu && state) {
+ fprintf(stderr, "This system is not configured for CPU 0 online/offline\n");
+ fprintf(stderr, "Ignoring online request for CPU 0 as this is already online\n");
+ return;
+ }
err(-1, "%s open failed", buffer);
+ }
if (state)
ret = write(fd, "1\n", 2);