From mboxrd@z Thu Jan 1 00:00:00 1970 From: akpm@linux-foundation.org Subject: + alpha-add-performance-monitor-interrupt-counter.patch added to -mm tree Date: Mon, 03 May 2010 15:13:15 -0700 Message-ID: <201005032213.o43MDFRu024616@imap1.linux-foundation.org> Reply-To: linux-kernel@vger.kernel.org Return-path: Received: from smtp1.linux-foundation.org ([140.211.169.13]:59377 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755422Ab0ECWON (ORCPT ); Mon, 3 May 2010 18:14:13 -0400 Sender: mm-commits-owner@vger.kernel.org List-Id: mm-commits@vger.kernel.org To: mm-commits@vger.kernel.org Cc: mcree@orcon.net.nz, ink@jurassic.park.msu.ru, jay.estabrook@hp.com, mattst88@gmail.com, mingo@elte.hu, peterz@infradead.org, rth@twiddle.net, tglx@linutronix.de The patch titled alpha: add performance monitor interrupt counter has been added to the -mm tree. Its filename is alpha-add-performance-monitor-interrupt-counter.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: alpha: add performance monitor interrupt counter From: Michael Cree The following patches implement hardware performance events for the Alpha EV67 and later CPUs. I have had this running on a Compaq XP1000 (EV67, single CPU) for a few days now. Pretty cool -- discovered that the glibc exp2() library routine uses on average 985 cycles to execute 777 CPU instructions whereas Compaq's CPML library version of exp2() uses on average 32 cycles to execute 47 CPU instructions to achieve the same thing! This patch: Add performance monitor interrupt counternd and export the count to user space via /proc/interrupts. Signed-off-by: Michael Cree Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Matt Turner Cc: Thomas Gleixner Cc: Peter Zijlstra Cc: Ingo Molnar Cc: Jay Estabrook Signed-off-by: Andrew Morton --- arch/alpha/include/asm/hw_irq.h | 1 + arch/alpha/kernel/irq.c | 7 +++++-- 2 files changed, 6 insertions(+), 2 deletions(-) diff -puN arch/alpha/include/asm/hw_irq.h~alpha-add-performance-monitor-interrupt-counter arch/alpha/include/asm/hw_irq.h --- a/arch/alpha/include/asm/hw_irq.h~alpha-add-performance-monitor-interrupt-counter +++ a/arch/alpha/include/asm/hw_irq.h @@ -3,6 +3,7 @@ extern volatile unsigned long irq_err_count; +DECLARE_PER_CPU(unsigned long, irq_pmi_count); #ifdef CONFIG_ALPHA_GENERIC #define ACTUAL_NR_IRQS alpha_mv.nr_irqs diff -puN arch/alpha/kernel/irq.c~alpha-add-performance-monitor-interrupt-counter arch/alpha/kernel/irq.c --- a/arch/alpha/kernel/irq.c~alpha-add-performance-monitor-interrupt-counter +++ a/arch/alpha/kernel/irq.c @@ -31,6 +31,7 @@ #include volatile unsigned long irq_err_count; +DEFINE_PER_CPU(unsigned long, irq_pmi_count); void ack_bad_irq(unsigned int irq) { @@ -63,9 +64,7 @@ int irq_select_affinity(unsigned int irq int show_interrupts(struct seq_file *p, void *v) { -#ifdef CONFIG_SMP int j; -#endif int irq = *(loff_t *) v; struct irqaction * action; unsigned long flags; @@ -112,6 +111,10 @@ unlock: seq_printf(p, "%10lu ", cpu_data[j].ipi_count); seq_putc(p, '\n'); #endif + seq_puts(p, "PMI: "); + for_each_online_cpu(j) + seq_printf(p, "%10lu ", per_cpu(irq_pmi_count, j)); + seq_puts(p, " Performance Monitoring\n"); seq_printf(p, "ERR: %10lu\n", irq_err_count); } return 0; _ Patches currently in -mm which might be from mcree@orcon.net.nz are alpha-add-performance-monitor-interrupt-counter.patch alpha-add-wrperfmonh-header-file-to-aid-use-of-wrperfmon-palcall.patch alpha-implement-hw-performance-events-on-the-ev67-and-later-cpus.patch