1 files changed, 29 insertions, 0 deletions

diff --git a/init/Kconfig b/init/Kconfig
index f763762d544a..78bede218f10 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -732,6 +732,35 @@ config AIO
           by some high performance threaded applications. Disabling
           this option saves about 7k.
 
+config HAVE_PERF_COUNTERS
+        bool
+
+menu "Performance Counters"
+
+config PERF_COUNTERS
+        bool "Kernel Performance Counters"
+        depends on HAVE_PERF_COUNTERS
+        default y
+        help
+          Enable kernel support for performance counter hardware.
+
+          Performance counters are special hardware registers available
+          on most modern CPUs. These registers count the number of certain
+          types of hw events: such as instructions executed, cachemisses
+          suffered, or branches mis-predicted - without slowing down the
+          kernel or applications. These registers can also trigger interrupts
+          when a threshold number of events have passed - and can thus be
+          used to profile the code that runs on that CPU.
+
+          The Linux Performance Counter subsystem provides an abstraction of
+          these hardware capabilities, available via a system call. It
+          provides per task and per CPU counters, and it provides event
+          capabilities on top of those.
+
+          Say Y if unsure.
+
+endmenu
+
 config VM_EVENT_COUNTERS
         default y
         bool "Enable VM event counters for /proc/vmstat" if EMBEDDED