--- linux-2.6.28.perfctr26/CREDITS.~1~	2008-12-25 15:54:13.000000000 +0100

+++ linux-2.6.28.perfctr26/CREDITS	2008-12-25 16:06:06.000000000 +0100

@@ -2739,6 +2739,7 @@ N: Mikael Pettersson

 E: mikpe@it.uu.se

 W: http://user.it.uu.se/~mikpe/linux/

 D: Miscellaneous fixes

+D: Performance-monitoring counters driver

 N: Reed H. Petty

 E: rhp@draper.net

--- linux-2.6.28.perfctr26/Documentation/ioctl/ioctl-number.txt.~1~	2008-12-25 15:54:13.000000000 +0100

+++ linux-2.6.28.perfctr26/Documentation/ioctl/ioctl-number.txt	2008-12-25 16:06:06.000000000 +0100

@@ -193,6 +193,8 @@ Code	Seq#	Include File		Comments

 0xB1	00-1F	PPPoX			<mailto:mostrows@styx.uwaterloo.ca>

 0xCB	00-1F	CBM serial IEC bus	in development:

 					<mailto:michael.klein@puffin.lb.shuttle.de>

+0xD0	all	performance counters	see drivers/perfctr/

+					<mailto:mikpe@it.uu.se>

 0xDD	00-3F	ZFCP device driver	see drivers/s390/scsi/

 					<mailto:aherrman@de.ibm.com>

 0xF3	00-3F	video/sisfb.h		sisfb (in development)

--- linux-2.6.28.perfctr26/MAINTAINERS.~1~	2008-12-25 15:54:13.000000000 +0100

+++ linux-2.6.28.perfctr26/MAINTAINERS	2008-12-25 16:06:06.000000000 +0100

@@ -3355,6 +3355,12 @@ M:	balbir@linux.vnet.ibm.com

 L:	linux-kernel@vger.kernel.org

 S:	Maintained

+PERFORMANCE-MONITORING COUNTERS DRIVER

+P:	Mikael Pettersson

+M:	mikpe@it.uu.se

+W:	http://user.it.uu.se/~mikpe/linux/perfctr/

+S:	Maintained

+

 PERSONALITY HANDLING

 P:	Christoph Hellwig

 M:	hch@infradead.org

--- linux-2.6.28.perfctr26/arch/arm/Kconfig.~1~	2008-12-25 15:54:13.000000000 +0100

+++ linux-2.6.28.perfctr26/arch/arm/Kconfig	2008-12-25 16:06:06.000000000 +0100

@@ -647,6 +647,10 @@ config IWMMXT

 	  Enable support for iWMMXt context switching at run time if

 	  running on a CPU that supports it.

+if CPU_XSCALE

+source drivers/perfctr/Kconfig

+endif

+

 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER

 config XSCALE_PMU

 	bool

--- linux-2.6.28.perfctr26/arch/arm/include/asm/processor.h.~1~	2008-12-25 15:54:13.000000000 +0100

+++ linux-2.6.28.perfctr26/arch/arm/include/asm/processor.h	2008-12-25 16:06:06.000000000 +0100

@@ -50,6 +50,10 @@ struct thread_struct {

 	unsigned long		error_code;

 							/* debugging	  */

 	struct debug_info	debug;

+

+#ifdef CONFIG_PERFCTR_VIRTUAL

+	struct vperfctr		*perfctr;		/* performance counters */

+#endif

 };

 #define INIT_THREAD  {	}

--- linux-2.6.28.perfctr26/arch/arm/include/asm/system.h.~1~	2008-12-25 15:54:13.000000000 +0100

+++ linux-2.6.28.perfctr26/arch/arm/include/asm/system.h	2008-12-25 16:06:06.000000000 +0100

@@ -211,7 +211,9 @@ extern struct task_struct *__switch_to(s

 #define switch_to(prev,next,last)					\

 do {									\

+	perfctr_suspend_thread(&(prev)->thread);			\

 	last = __switch_to(prev,task_thread_info(prev), task_thread_info(next));	\

+	perfctr_resume_thread(&(current)->thread);			\

 } while (0)

 #if defined(CONFIG_CPU_SA1100) || defined(CONFIG_CPU_SA110)

--- linux-2.6.28.perfctr26/arch/arm/kernel/process.c.~1~	2008-12-25 15:54:13.000000000 +0100

+++ linux-2.6.28.perfctr26/arch/arm/kernel/process.c	2008-12-25 16:06:06.000000000 +0100

@@ -26,6 +26,7 @@

 #include <linux/cpu.h>

 #include <linux/elfcore.h>

 #include <linux/pm.h>

+#include <linux/perfctr.h>

 #include <linux/tick.h>

 #include <linux/utsname.h>

 #include <linux/uaccess.h>

@@ -272,6 +273,7 @@ void show_regs(struct pt_regs * regs)

  */

 void exit_thread(void)

 {

+	perfctr_exit_thread(&current->thread);

 }

 ATOMIC_NOTIFIER_HEAD(thread_notify_head);

@@ -317,6 +319,8 @@ copy_thread(int nr, unsigned long clone_

 	if (clone_flags & CLONE_SETTLS)

 		thread->tp_value = regs->ARM_r3;

+	perfctr_copy_task(p, regs);

+

 	return 0;

 }

--- linux-2.6.28.perfctr26/arch/powerpc/include/asm/processor.h.~1~	2008-10-11 10:43:49.000000000 +0200

+++ linux-2.6.28.perfctr26/arch/powerpc/include/asm/processor.h	2008-12-25 16:06:06.000000000 +0100

@@ -199,6 +199,9 @@ struct thread_struct {

 	unsigned long	spefscr;	/* SPE & eFP status */

 	int		used_spe;	/* set if process has used spe */

 #endif /* CONFIG_SPE */

+#ifdef CONFIG_PERFCTR_VIRTUAL

+	struct vperfctr *perfctr;	/* performance counters */

+#endif

 };

 #define ARCH_MIN_TASKALIGN 16

--- linux-2.6.28.perfctr26/arch/powerpc/kernel/process.c.~1~	2008-10-11 10:43:50.000000000 +0200

+++ linux-2.6.28.perfctr26/arch/powerpc/kernel/process.c	2008-12-25 16:06:06.000000000 +0100

@@ -30,6 +30,7 @@

 #include <linux/init_task.h>

 #include <linux/module.h>

 #include <linux/kallsyms.h>

+#include <linux/perfctr.h>

 #include <linux/mqueue.h>

 #include <linux/hardirq.h>

 #include <linux/utsname.h>

@@ -405,8 +406,10 @@ struct task_struct *__switch_to(struct t

 	 * window where the kernel stack SLB and the kernel stack are out

 	 * of sync. Hard disable here.

 	 */

+	perfctr_suspend_thread(&prev->thread);

 	hard_irq_disable();

 	last = _switch(old_thread, new_thread);

+	perfctr_resume_thread(&current->thread);

 	local_irq_restore(flags);

@@ -544,6 +547,7 @@ void show_regs(struct pt_regs * regs)

 void exit_thread(void)

 {

 	discard_lazy_cpu_state();

+	perfctr_exit_thread(&current->thread);

 }

 void flush_thread(void)

@@ -670,6 +674,8 @@ int copy_thread(int nr, unsigned long cl

 	kregs->nip = (unsigned long)ret_from_fork;

 #endif

+	perfctr_copy_task(p, regs);

+

 	return 0;

 }

--- linux-2.6.28.perfctr26/arch/powerpc/platforms/Kconfig.cputype.~1~	2008-12-25 15:54:14.000000000 +0100

+++ linux-2.6.28.perfctr26/arch/powerpc/platforms/Kconfig.cputype	2008-12-25 16:06:06.000000000 +0100

@@ -256,4 +256,8 @@ config NOT_COHERENT_CACHE

 config CHECK_CACHE_COHERENCY

 	bool

+if PPC32

+source "drivers/perfctr/Kconfig"

+endif

+

 endmenu

--- linux-2.6.28.perfctr26/arch/x86/Kconfig.~1~	2008-12-25 15:54:14.000000000 +0100

+++ linux-2.6.28.perfctr26/arch/x86/Kconfig	2008-12-25 16:06:06.000000000 +0100

@@ -1293,6 +1293,8 @@ config CC_STACKPROTECTOR_ALL

 	  functions that use large-ish on-stack buffers. By enabling

 	  this option, GCC will be asked to do this for ALL functions.

+source "drivers/perfctr/Kconfig"

+

 source kernel/Kconfig.hz

 config KEXEC

--- linux-2.6.28.perfctr26/arch/x86/include/asm/irq_vectors.h.~1~	2008-12-25 15:54:14.000000000 +0100

+++ linux-2.6.28.perfctr26/arch/x86/include/asm/irq_vectors.h	2008-12-25 16:06:06.000000000 +0100

@@ -85,9 +85,10 @@

  * sources per level' errata.

  */

 #define LOCAL_TIMER_VECTOR	0xef

+#define LOCAL_PERFCTR_VECTOR	0xee

 /*

- * First APIC vector available to drivers: (vectors 0x30-0xee) we

+ * First APIC vector available to drivers: (vectors 0x30-0xed) we

  * start at 0x31(0x41) to spread out vectors evenly between priority

  * levels. (0x80 is the syscall vector)

  */

--- linux-2.6.28.perfctr26/arch/x86/include/asm/processor.h.~1~	2008-12-25 15:54:14.000000000 +0100

+++ linux-2.6.28.perfctr26/arch/x86/include/asm/processor.h	2008-12-25 16:06:06.000000000 +0100

@@ -429,6 +429,8 @@ struct thread_struct {

 	unsigned long		iopl;

 	/* Max allowed port in the bitmap, in bytes: */

 	unsigned		io_bitmap_max;

+/* performance counters */

+	struct vperfctr		*perfctr;

 /* MSR_IA32_DEBUGCTLMSR value to switch in if TIF_DEBUGCTLMSR is set.  */

 	unsigned long	debugctlmsr;

 #ifdef CONFIG_X86_DS

--- linux-2.6.28.perfctr26/arch/x86/include/asm/system.h.~1~	2008-12-25 15:54:14.000000000 +0100

+++ linux-2.6.28.perfctr26/arch/x86/include/asm/system.h	2008-12-25 16:06:06.000000000 +0100

@@ -37,6 +37,7 @@ do {									\

 	 * __switch_to())						\

 	 */								\

 	unsigned long ebx, ecx, edx, esi, edi;				\

+	perfctr_suspend_thread(&(prev)->thread);			\

 									\

 	asm volatile("pushfl\n\t"		/* save    flags */	\

 		     "pushl %%ebp\n\t"		/* save    EBP   */	\

@@ -87,7 +88,8 @@ do {									\

 	  "r12", "r13", "r14", "r15"

 /* Save restore flags to clear handle leaking NT */

-#define switch_to(prev, next, last) \

+#define switch_to(prev, next, last) do { \

+	perfctr_suspend_thread(&(prev)->thread); \

 	asm volatile(SAVE_CONTEXT						    \

 	     "movq %%rsp,%P[threadrsp](%[prev])\n\t" /* save RSP */	  \

 	     "movq %P[threadrsp](%[next]),%%rsp\n\t" /* restore RSP */	  \

@@ -107,7 +109,8 @@ do {									\

 	       [tif_fork] "i" (TIF_FORK),			  	  \

 	       [thread_info] "i" (offsetof(struct task_struct, stack)),   \

 	       [pda_pcurrent] "i" (offsetof(struct x8664_pda, pcurrent))  \

-	     : "memory", "cc" __EXTRA_CLOBBER)

+	     : "memory", "cc" __EXTRA_CLOBBER); \

+} while (0)

 #endif

 #ifdef __KERNEL__

--- linux-2.6.28.perfctr26/arch/x86/kernel/entry_32.S.~1~	2008-12-25 15:54:14.000000000 +0100

+++ linux-2.6.28.perfctr26/arch/x86/kernel/entry_32.S	2008-12-25 16:06:06.000000000 +0100

@@ -678,6 +678,23 @@ ENDPROC(name)

 /* The include is where all of the SMP etc. interrupts come from */

 #include "entry_arch.h"

+#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_KPERFCTR)

+ENTRY(perfctr_interrupt)

+	RING0_INT_FRAME

+	pushl $~(LOCAL_PERFCTR_VECTOR)

+	CFI_ADJUST_CFA_OFFSET 4

+	SAVE_ALL

+	TRACE_IRQS_OFF

+	pushl %esp

+	CFI_ADJUST_CFA_OFFSET 4

+	call smp_perfctr_interrupt

+	addl $4, %esp

+	CFI_ADJUST_CFA_OFFSET -4

+	jmp ret_from_intr

+	CFI_ENDPROC

+ENDPROC(perfctr_interrupt)

+#endif

+

 KPROBE_ENTRY(page_fault)

 	RING0_EC_FRAME

 	pushl $do_page_fault

--- linux-2.6.28.perfctr26/arch/x86/kernel/entry_64.S.~1~	2008-12-25 15:54:14.000000000 +0100

+++ linux-2.6.28.perfctr26/arch/x86/kernel/entry_64.S	2008-12-25 16:06:06.000000000 +0100

@@ -870,6 +870,12 @@ ENTRY(spurious_interrupt)

 	apicinterrupt SPURIOUS_APIC_VECTOR,smp_spurious_interrupt

 END(spurious_interrupt)

+#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_KPERFCTR)

+ENTRY(perfctr_interrupt)

+	apicinterrupt LOCAL_PERFCTR_VECTOR,smp_perfctr_interrupt

+END(perfctr_interrupt)

+#endif

+

 /*

  * Exception entry points.

  */ 		

--- linux-2.6.28.perfctr26/arch/x86/kernel/irqinit_32.c.~1~	2008-12-25 15:54:14.000000000 +0100

+++ linux-2.6.28.perfctr26/arch/x86/kernel/irqinit_32.c	2008-12-25 16:06:06.000000000 +0100

@@ -20,6 +20,7 @@

 #include <asm/apic.h>

 #include <asm/arch_hooks.h>

 #include <asm/i8259.h>

+#include <asm/perfctr.h>

@@ -175,6 +176,8 @@ void __init native_init_IRQ(void)

 	 */

 	intr_init_hook();

+	perfctr_vector_init();

+

 	/*

 	 * External FPU? Set up irq13 if so, for

 	 * original braindamaged IBM FERR coupling.

--- linux-2.6.28.perfctr26/arch/x86/kernel/irqinit_64.c.~1~	2008-12-25 15:54:14.000000000 +0100

+++ linux-2.6.28.perfctr26/arch/x86/kernel/irqinit_64.c	2008-12-25 16:06:06.000000000 +0100

@@ -21,6 +21,7 @@

 #include <asm/delay.h>

 #include <asm/desc.h>

 #include <asm/apic.h>

+#include <asm/perfctr.h>

 #include <asm/i8259.h>

 /*

@@ -224,6 +225,8 @@ void __init native_init_IRQ(void)

 	apic_intr_init();

+	perfctr_vector_init();

+

 	if (!acpi_ioapic)

 		setup_irq(2, &irq2);

 }

--- linux-2.6.28.perfctr26/arch/x86/kernel/process_32.c.~1~	2008-12-25 15:54:14.000000000 +0100

+++ linux-2.6.28.perfctr26/arch/x86/kernel/process_32.c	2008-12-25 16:06:06.000000000 +0100

@@ -28,6 +28,7 @@

 #include <linux/delay.h>

 #include <linux/reboot.h>

 #include <linux/init.h>

+#include <linux/perfctr.h>

 #include <linux/mc146818rtc.h>

 #include <linux/module.h>

 #include <linux/kallsyms.h>

@@ -250,6 +251,7 @@ void exit_thread(void)

 		tss->x86_tss.io_bitmap_base = INVALID_IO_BITMAP_OFFSET;

 		put_cpu();

 	}

+	perfctr_exit_thread(&current->thread);

 #ifdef CONFIG_X86_DS

 	/* Free any DS contexts that have not been properly released. */

 	if (unlikely(current->thread.ds_ctx)) {

@@ -315,6 +317,8 @@ int copy_thread(int nr, unsigned long cl

 	savesegment(gs, p->thread.gs);

+	perfctr_copy_task(p, regs);

+

 	tsk = current;

 	if (unlikely(test_tsk_thread_flag(tsk, TIF_IO_BITMAP))) {

 		p->thread.io_bitmap_ptr = kmemdup(tsk->thread.io_bitmap_ptr,

@@ -629,6 +633,8 @@ struct task_struct * __switch_to(struct 

 	x86_write_percpu(current_task, next_p);

+	perfctr_resume_thread(next);

+

 	return prev_p;

 }

--- linux-2.6.28.perfctr26/arch/x86/kernel/process_64.c.~1~	2008-12-25 15:54:14.000000000 +0100

+++ linux-2.6.28.perfctr26/arch/x86/kernel/process_64.c	2008-12-25 16:06:06.000000000 +0100

@@ -31,6 +31,7 @@

 #include <linux/delay.h>

 #include <linux/module.h>

 #include <linux/ptrace.h>

+#include <linux/perfctr.h>

 #include <linux/random.h>

 #include <linux/notifier.h>

 #include <linux/kprobes.h>

@@ -235,6 +236,7 @@ void exit_thread(void)

 		t->io_bitmap_max = 0;

 		put_cpu();

 	}

+	perfctr_exit_thread(t);

 #ifdef CONFIG_X86_DS

 	/* Free any DS contexts that have not been properly released. */

 	if (unlikely(t->ds_ctx)) {

@@ -347,6 +349,8 @@ int copy_thread(int nr, unsigned long cl

 	savesegment(es, p->thread.es);

 	savesegment(ds, p->thread.ds);

+	perfctr_copy_task(p, regs);

+

 	if (unlikely(test_tsk_thread_flag(me, TIF_IO_BITMAP))) {

 		p->thread.io_bitmap_ptr = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL);

 		if (!p->thread.io_bitmap_ptr) {

@@ -671,6 +675,9 @@ __switch_to(struct task_struct *prev_p, 

 	 */

 	if (tsk_used_math(next_p) && next_p->fpu_counter > 5)

 		math_state_restore();

+

+	perfctr_resume_thread(next);

+

 	return prev_p;

 }

--- linux-2.6.28.perfctr26/drivers/Makefile.~1~	2008-12-25 15:54:14.000000000 +0100

+++ linux-2.6.28.perfctr26/drivers/Makefile	2008-12-25 16:06:06.000000000 +0100

@@ -89,6 +89,7 @@ obj-$(CONFIG_MEMSTICK)		+= memstick/

 obj-$(CONFIG_NEW_LEDS)		+= leds/

 obj-$(CONFIG_INFINIBAND)	+= infiniband/

 obj-$(CONFIG_SGI_SN)		+= sn/

+obj-$(CONFIG_KPERFCTR)		+= perfctr/

 obj-y				+= firmware/

 obj-$(CONFIG_CRYPTO)		+= crypto/

 obj-$(CONFIG_SUPERH)		+= sh/

--- linux-2.6.28.perfctr26/fs/exec.c.~1~	2008-12-25 15:54:16.000000000 +0100

+++ linux-2.6.28.perfctr26/fs/exec.c	2008-12-25 16:06:06.000000000 +0100

@@ -49,6 +49,7 @@

 #include <linux/tsacct_kern.h>

 #include <linux/cn_proc.h>

 #include <linux/audit.h>

+#include <linux/perfctr.h>

 #include <linux/tracehook.h>

 #include <linux/kmod.h>

@@ -999,6 +1000,7 @@ int flush_old_exec(struct linux_binprm *

 	set_task_comm(current, tcomm);

 	current->flags &= ~PF_RANDOMIZE;

+	perfctr_flush_thread(&current->thread);

 	flush_thread();

 	/* Set the new mm task size. We have to do that late because it may

--- linux-2.6.28.perfctr26/kernel/exit.c.~1~	2008-12-25 15:54:17.000000000 +0100

+++ linux-2.6.28.perfctr26/kernel/exit.c	2008-12-25 16:06:06.000000000 +0100

@@ -30,6 +30,7 @@

 #include <linux/proc_fs.h>

 #include <linux/kthread.h>

 #include <linux/mempolicy.h>

+#include <linux/perfctr.h>

 #include <linux/taskstats_kern.h>

 #include <linux/delayacct.h>

 #include <linux/freezer.h>

@@ -198,6 +199,7 @@ repeat:

 			leader->exit_state = EXIT_DEAD;

 	}

+	perfctr_release_task(p);

 	write_unlock_irq(&tasklist_lock);

 	release_thread(p);

 	call_rcu(&p->rcu, delayed_put_task_struct);

--- linux-2.6.28.perfctr26/kernel/sched.c.~1~	2008-12-25 15:54:17.000000000 +0100

+++ linux-2.6.28.perfctr26/kernel/sched.c	2008-12-25 16:06:06.000000000 +0100

@@ -54,6 +54,7 @@

 #include <linux/cpu.h>

 #include <linux/cpuset.h>

 #include <linux/percpu.h>

+#include <linux/perfctr.h>

 #include <linux/kthread.h>

 #include <linux/proc_fs.h>

 #include <linux/seq_file.h>

@@ -5967,6 +5968,8 @@ int set_cpus_allowed_ptr(struct task_str

 	struct rq *rq;

 	int ret = 0;

+	perfctr_set_cpus_allowed(p, *new_mask); /* XXX: convert to _ptr */

+

 	rq = task_rq_lock(p, &flags);

 	if (!cpus_intersects(*new_mask, cpu_online_map)) {

 		ret = -EINVAL;

--- linux-2.6.28.perfctr26/kernel/timer.c.~1~	2008-12-25 15:54:17.000000000 +0100

+++ linux-2.6.28.perfctr26/kernel/timer.c	2008-12-25 16:06:06.000000000 +0100

@@ -33,6 +33,7 @@

 #include <linux/jiffies.h>

 #include <linux/posix-timers.h>

 #include <linux/cpu.h>

+#include <linux/perfctr.h>

 #include <linux/syscalls.h>

 #include <linux/delay.h>

 #include <linux/tick.h>

@@ -1044,6 +1045,7 @@ void update_process_times(int user_tick)

 	/* Note: this timer irq context must be accounted for as well. */

 	account_process_tick(p, user_tick);

+	perfctr_sample_thread(&p->thread);

 	run_local_timers();

 	if (rcu_pending(cpu))

 		rcu_check_callbacks(cpu, user_tick);