lkml.org 
[lkml]   [2012]   [May]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: Perf events warning..
Date
Hi,

On Wed, 16 May 2012 10:38:33 +0900, Namhyung Kim wrote:
> On Tue, 15 May 2012 09:37:37 -0600, David Ahern wrote:
>> :-) Right, KVM and the vPMU added in 3.3. That said, it is recognized
>> as a Nehalem and perf walks the Nehalem events path.
>>
>> So if VM based WARNING is not to your liking, here's a baremetal version:
>>
>> [ 84.388495] ------------[ cut here ]------------
>> [ 84.388554] WARNING: at
>> /opt/sw/ahern/kernels/kernel-2.6.git/arch/x86/kernel/cpu/perf_event.c:1054
>> x86_pmu_start+0xdc/0x110()
>> [ 84.388613] Hardware name: ProLiant DL380 G6
>> [ 84.388663] Modules linked in: nfs fscache bridge stp llc
>> ipt_MASQUERADE iptable_nat nf_nat xt_physdev nf_conntrack_ipv4
>> nf_defrag_ipv4 xt_state nf_conntrack xt_multiport nfsd lockd nfs_acl
>> auth_rpcgss sunrpc coretemp ipmi_si ipmi_msghandler bnx2 i7core_edac
>> edac_core hpilo hpwdt acpi_power_meter crc32c_intel microcode iTCO_wdt
>> iTCO_vendor_support vhost_net pcspkr macvtap macvlan tun virtio_net
>> kvm_intel kvm usb_storage hpsa radeon ttm drm_kms_helper drm
>> i2c_algo_bit i2c_core [last unloaded: scsi_wait_scan]
>> [ 84.390624] Pid: 1806, comm: find Not tainted 3.4.0-rc7+ #1
>> [ 84.390671] Call Trace:
>> [ 84.390719] [<ffffffff810579df>] warn_slowpath_common+0x7f/0xc0
>> [ 84.390769] [<ffffffff81057a3a>] warn_slowpath_null+0x1a/0x20
>> [ 84.390831] [<ffffffff8102546c>] x86_pmu_start+0xdc/0x110
>> [ 84.390880] [<ffffffff81025b22>] x86_pmu_enable+0x212/0x270
>> [ 84.390996] [<ffffffff81116496>] perf_event_context_sched_in+0xe6/0x100
>> [ 84.391113] [<ffffffff811180b3>] perf_event_comm+0x103/0x2b0
>> [ 84.391232] [<ffffffff81186732>] set_task_comm+0x72/0xe0
>> [ 84.391361] [<ffffffff81186e0b>] setup_new_exec+0x8b/0x240
>> [ 84.391480] [<ffffffff811ceca7>] load_elf_binary+0x3e7/0x19a0
>> [ 84.391600] [<ffffffff81145ac2>] ? get_user_pages+0x52/0x60
>> [ 84.391716] [<ffffffff81184af8>] ? get_user_arg_ptr+0x38/0x80
>> [ 84.391833] [<ffffffff81184f9e>] search_binary_handler+0xee/0x340
>> [ 84.391963] [<ffffffff811ce8c0>] ? load_elf_library+0x230/0x230
>> [ 84.392080] [<ffffffff81186bef>] do_execve_common+0x36f/0x410
>> [ 84.392196] [<ffffffff81186cca>] do_execve+0x3a/0x40
>> [ 84.392328] [<ffffffff8101d4a7>] sys_execve+0x47/0x70
>> [ 84.392445] [<ffffffff816002ec>] stub_execve+0x6c/0xc0
>> [ 84.392558] ---[ end trace 78e50a201158fd5d ]---
>>
>>
>> Though this one is an HP server with the lovely:
>>
>> [ 0.143910] Performance Events: PEBS fmt1+, 16-deep LBR, Nehalem
>> events, Broken BIOS detected, complain to your hardware vendor.
>> [ 0.144351] [Firmware Bug]: the BIOS has corrupted hw-PMU resources
>> (MSR 38d is 330)
>> [ 0.144627] Intel PMU driver.
>> [ 0.144777] CPU erratum AAJ80 worked around
>>
>> David
>
> I got a similar warning on my SNB (i7-3930K) desktop.
>

The git bisect told me (sigh):

a34668f6beb4ab01e07683276d6a24bab6c175e0 is the first bad commit
commit a34668f6beb4ab01e07683276d6a24bab6c175e0
Author: Youquan Song <youquan.song@intel.com>
Date: Tue Aug 2 14:01:35 2011 +0800

perf, x86: Add model 45 SandyBridge support

Add support to Romely-EP SandyBridge.

Signed-off-by: Youquan Song <youquan.song@intel.com>
Signed-off-by: Anhua Xu <anhua.xu@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1312264895-2010-1-git-send-email-youquan.song@intel.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>

:040000 040000 c8302c68b80d3657cfd6afa5eb51300c0996baf1 ba78ebeb8ad6cce92fba8f643b4c5b1007d0e336 March


Thanks,
Namhyung


\
 
 \ /
  Last update: 2012-05-21 09:01    [W:0.075 / U:0.280 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site