[NFC][intel pt] Improve troubleshooting message

diff --git a/lldb/packages/Python/lldbsuite/test/tools/intelpt/intelpt_testcase.py b/lldb/packages/Python/lldbsuite/test/tools/intelpt/intelpt_testcase.py
index 511dd6822b866c9c9df0eb96bff7f1c3b5a4b287..5c70bad91ba68f6034298338f992006a565ad892 100644 (file)
--- a/lldb/packages/Python/lldbsuite/test/tools/intelpt/intelpt_testcase.py
+++ b/lldb/packages/Python/lldbsuite/test/tools/intelpt/intelpt_testcase.py
@@ -44,7 +44,8 @@ class TraceIntelPTTestCaseBase(TestBase):
                 return False
         if not is_supported():
             self.skipTest("Per cpu tracing is not supported. You need "
-                "/proc/sys/kernel/perf_event_paranoid to be 0 or -1.")
+                "/proc/sys/kernel/perf_event_paranoid to be 0 or -1. "
+                "You can use `sudo sysctl -w kernel.perf_event_paranoid=-1` for that.")
 
     def getTraceOrCreate(self):
         if not self.target().GetTrace().IsValid():

diff --git a/lldb/source/Plugins/Process/Linux/IntelPTMultiCoreTrace.cpp b/lldb/source/Plugins/Process/Linux/IntelPTMultiCoreTrace.cpp
index 8f646c163bd105ad0ba8695d2b68a5a82f381421..a4794e7c8ca349f7cee911e7f52c82288fe5a292 100644 (file)
--- a/lldb/source/Plugins/Process/Linux/IntelPTMultiCoreTrace.cpp
+++ b/lldb/source/Plugins/Process/Linux/IntelPTMultiCoreTrace.cpp
@@ -29,7 +29,7 @@ static Error IncludePerfEventParanoidMessageInError(Error &&error) {
   return createStringError(
       inconvertibleErrorCode(),
       "%s\nYou might need to rerun as sudo or to set "
-      "/proc/sys/kernel/perf_event_paranoid to a value of 0 or -1.",
+      "/proc/sys/kernel/perf_event_paranoid to a value of 0 or -1. You can use `sudo sysctl -w kernel.perf_event_paranoid=-1` for that.",
       toString(std::move(error)).c_str());
 }