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Date: Tue, 4 Nov 2008 19:18:55 +0100 From: Robert Richter <robert.richter@....com> To: Andi Kleen <andi@...stfloor.org> CC: Pekka Enberg <penberg@...helsinki.fi>, Eric Dumazet <dada1@...mosbay.com>, linux kernel <linux-kernel@...r.kernel.org>, Andi Kleen <ak@...ux.intel.com>, Ingo Molnar <mingo@...e.hu> Subject: Re: linux-2.6.28-rc2 regression : oprofile doesnt work anymore ? Andi, your patchset breaks oprofile on Intel Core 2 cpus. I could bisect the bug for c493756..5951290. Please take a look at this and send me a fix. Thanks, -Robert Linux woglinde 2.6.27-oprofile-x86_64-standard-03189-g5951290 #5 SMP Tue Nov 4 18:16:41 CET 2008 x86_64 Intel(R) Core(TM)2 CPU 6300 @ 1.86GHz GenuineIntel GNU/Linux IBS Fetch not supported - ignored IBS OP not supported - ignored Using default event: CPU_CLK_UNHALTED:100000:0:1:1 Daemon started. Profiler running. Oprofile started Daemon running: pid 5845 Separate options: none vmlinux file: none Image filter: none Call-graph depth: 0 number of samples #1: 11 Stopping profiling. Killing daemon. number of samples #2: 11 Linux woglinde 2.6.27-oprofile-x86_64-standard-03185-gc493756 #6 SMP Tue Nov 4 19:05:13 CET 2008 x86_64 Intel(R) Core(TM)2 CPU 6300 @ 1.86GHz GenuineIntel GNU/Linux IBS Fetch not supported - ignored IBS OP not supported - ignored Using default event: CPU_CLK_UNHALTED:100000:0:1:1 Daemon started. Profiler running. Oprofile started Daemon running: pid 5263 Separate options: none vmlinux file: none Image filter: none Call-graph depth: 0 number of samples #1: 25 Stopping profiling. Killing daemon. number of samples #2: 64 Increasing sample number commit 59512900baab03c5629f2ff5efad1d5d4e682ece Author: Andi Kleen <ak@...ux.intel.com> Date: Mon Sep 29 22:23:33 2008 +0200 oprofile: discover counters for op ppro too Discover number of counters for all family 6 models even when not in arch perfmon mode. Signed-off-by: Andi Kleen <ak@...ux.intel.com> Signed-off-by: Robert Richter <robert.richter@....com> arch/x86/oprofile/op_model_ppro.c | 8 +++++--- arch/x86/oprofile/op_x86_model.h | 2 +- 2 files changed, 6 insertions(+), 4 deletions(-) commit b99170288421c79f0c2efa8b33e26e65f4bb7fb8 Author: Andi Kleen <ak@...ux.intel.com> Date: Mon Aug 18 14:50:31 2008 +0200 oprofile: Implement Intel architectural perfmon support Newer Intel CPUs (Core1+) have support for architectural events described in CPUID 0xA. See the IA32 SDM Vol3b.18 for details. The advantage of this is that it can be done without knowing about the specific CPU, because the CPU describes by itself what performance events are supported. This is only a fallback because only a limited set of 6 events are supported. This allows to do profiling on Nehalem and on Atom systems (later not tested) This patch implements support for that in oprofile's Intel Family 6 profiling module. It also has the advantage of supporting an arbitary number of events now as reported by the CPU. Also allow arbitary counter widths >32bit while we're at it. Requires a patched oprofile userland to support the new architecture. v2: update for latest oprofile tree remove force_arch_perfmon Signed-off-by: Andi Kleen <ak@...ux.intel.com> Signed-off-by: Robert Richter <robert.richter@....com> arch/x86/oprofile/nmi_int.c | 23 ++++++-- arch/x86/oprofile/op_model_ppro.c | 104 +++++++++++++++++++++++++++++-------- arch/x86/oprofile/op_x86_model.h | 3 + 3 files changed, 102 insertions(+), 28 deletions(-) commit f645f6406463a01869c50844befc76d528971690 Author: Andi Kleen <ak@...ux.intel.com> Date: Wed Aug 20 17:22:02 2008 +0200 oprofile: Don't report Nehalem as core_2 This essentially reverts Linus' earlier 4b9f12a3779c548b68bc9af7d94030868ad3aa1b commit. Nehalem is not core_2, so it shouldn't be reported as such. However with the earlier arch perfmon patch it will fall back to arch perfmon mode now, so there is no need to fake it as core_2. The only drawback is that Linus will need to patch the arch perfmon support into his oprofile binary now, but I think he can do that. Signed-off-by: Andi Kleen <ak@...ux.intel.com> Signed-off-by: Robert Richter <robert.richter@....com> arch/x86/oprofile/nmi_int.c | 3 --- 1 files changed, 0 insertions(+), 3 deletions(-) commit 5d4488027d9cf3161c71566dfabb116bf69ab4d9 Author: Andi Kleen <ak@...ux.intel.com> Date: Mon Aug 18 14:49:47 2008 +0200 oprofile: drop const in num counters field allow to modify it at runtime Signed-off-by: Andi Kleen <ak@...ux.intel.com> Signed-off-by: Robert Richter <robert.richter@....com> arch/x86/oprofile/op_x86_model.h | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) -- Advanced Micro Devices, Inc. Operating System Research Center email: robert.richter@....com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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