diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 36 | ||||
| -rw-r--r-- | init/main.c | 2 |
2 files changed, 36 insertions, 2 deletions
diff --git a/init/Kconfig b/init/Kconfig index 7be4d38..9b68fee 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -308,7 +308,7 @@ menu "RCU Subsystem" choice prompt "RCU Implementation" - default CLASSIC_RCU + default TREE_RCU config CLASSIC_RCU bool "Classic RCU" @@ -933,6 +933,40 @@ 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 + select ANON_INODES + 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. + +config EVENT_PROFILE + bool "Tracepoint profile sources" + depends on PERF_COUNTERS && EVENT_TRACER + default y + +endmenu + config VM_EVENT_COUNTERS default y bool "Enable VM event counters for /proc/vmstat" if EMBEDDED diff --git a/init/main.c b/init/main.c index d721dad..bb7dc57 100644 --- a/init/main.c +++ b/init/main.c @@ -64,6 +64,7 @@ #include <linux/idr.h> #include <linux/ftrace.h> #include <linux/async.h> +#include <linux/kmemtrace.h> #include <trace/boot.h> #include <asm/io.h> @@ -71,7 +72,6 @@ #include <asm/setup.h> #include <asm/sections.h> #include <asm/cacheflush.h> -#include <trace/kmemtrace.h> #ifdef CONFIG_X86_LOCAL_APIC #include <asm/smp.h> |