--- 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(¤t->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(¤t->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(¤t->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(¤t->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(¤t->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);