perfevents: irq loop stuck!
From: Vince Weaver
Date: Tue May 13 2014 - 23:03:17 EST
I've gotten the following warning a few times now with the perf_fuzzer.
In each case it looks like the culprit might be the fixed-counter 0
value being 0000fffffffffffe
I have a somewhat repeatable trace and it looks like the problem event is:
pe[32].type=PERF_TYPE_HARDWARE;
pe[32].size=80;
pe[32].config=PERF_COUNT_HW_INSTRUCTIONS;
pe[32].sample_period=0xc0000000000000bd;
Should it be possible to open an event with a large negative sample_period
like that? I tried tracing through the sample_period setting code and
there are places that cast from u64 to s64 and other dubious things, but
as always I find the code very hard to follow.
This is on a Haswell machine.
[ 425.815773] ------------[ cut here ]------------
[ 425.821212] WARNING: CPU: 0 PID: 0 at arch/x86/kernel/cpu/perf_event_intel.c:1373 intel_pmu_handle_irq+0x2a4/0x3c0()
[ 425.833692] perfevents: irq loop stuck!
[ 425.839116] Modules linked in: fuse x86_pkg_temp_thermal intel_powerclamp coretemp kvm snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul snd_hda_intel i915 glue_helper snd_hda_controller snd_hda_codec snd_hwdep snd_pcm drm_kms_helper snd_seq snd_timer snd_seq_device ablk_helper snd cryptd ppdev iTCO_wdt iTCO_vendor_support lpc_ich drm soundcore mei_me parport_pc mfd_core evdev i2c_algo_bit i2c_i801 i2c_core button processor video battery wmi mei parport psmouse serio_raw pcspkr tpm_tis tpm sd_mod sr_mod crc_t10dif crct10dif_common cdrom ahci ehci_pci libahci e1000e ehci_hcd xhci_hcd libata ptp crc32c_intel usbcore scsi_mod pps_core usb_common thermal fan thermal_sys
[ 425.930947] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.15.0-rc1+ #104
[ 425.937876] Hardware name: LENOVO 10AM000AUS/SHARKBAY, BIOS FBKT72AUS 01/26/2014
[ 425.945817] 0000000000000009 ffff88011ea06cb0 ffffffff81649ca0 ffff88011ea06cf8
[ 425.953957] ffff88011ea06ce8 ffffffff810646ad 0000000000000064 ffff88011ea0cbe0
[ 425.961986] ffff8800cd1f4800 0000000000000040 ffff88011ea0cde0 ffff88011ea06d48
[ 425.970169] Call Trace:
[ 425.972858] <NMI> [<ffffffff81649ca0>] dump_stack+0x45/0x56
[ 425.979150] [<ffffffff810646ad>] warn_slowpath_common+0x7d/0xa0
[ 425.985617] [<ffffffff8106471c>] warn_slowpath_fmt+0x4c/0x50
[ 425.991770] [<ffffffff8102ef94>] intel_pmu_handle_irq+0x2a4/0x3c0
[ 425.998417] [<ffffffff8165378b>] perf_event_nmi_handler+0x2b/0x50
[ 426.005116] [<ffffffff81652f58>] nmi_handle.isra.5+0xa8/0x150
[ 426.011428] [<ffffffff81652eb5>] ? nmi_handle.isra.5+0x5/0x150
[ 426.017729] [<ffffffff816530d8>] do_nmi+0xd8/0x340
[ 426.022979] [<ffffffff81652581>] end_repeat_nmi+0x1e/0x2e
[ 426.028917] [<ffffffff8105034a>] ? native_write_msr_safe+0xa/0x10
[ 426.035514] [<ffffffff8105034a>] ? native_write_msr_safe+0xa/0x10
[ 426.042139] [<ffffffff8105034a>] ? native_write_msr_safe+0xa/0x10
[ 426.048752] <<EOE>> <IRQ> [<ffffffff8102eb7d>] intel_pmu_enable_event+0x21d/0x240
[ 426.057185] [<ffffffff81027baa>] x86_pmu_start+0x7a/0x100
[ 426.063125] [<ffffffff810283a5>] x86_pmu_enable+0x295/0x310
[ 426.069206] [<ffffffff8113528f>] perf_pmu_enable+0x2f/0x40
[ 426.075185] [<ffffffff8102644a>] x86_pmu_commit_txn+0x7a/0xa0
[ 426.081423] [<ffffffff813ca99b>] ? debug_object_activate+0x17b/0x220
[ 426.088298] [<ffffffff810b0cad>] ? __lock_acquire.isra.29+0x3bd/0xb90
[ 426.095245] [<ffffffff81135fe0>] ? event_sched_in.isra.76+0x150/0x1e0
[ 426.102269] [<ffffffff81136230>] group_sched_in+0x1c0/0x1e0
[ 426.108394] [<ffffffff81136725>] __perf_event_enable+0x255/0x260
[ 426.114976] [<ffffffff811318f0>] remote_function+0x40/0x50
[ 426.120916] [<ffffffff810de20d>] generic_smp_call_function_single_interrupt+0x5d/0x100
[ 426.129515] [<ffffffff810421dd>] smp_trace_call_function_single_interrupt+0x2d/0xb0
[ 426.137854] [<ffffffff8165bc1d>] trace_call_function_single_interrupt+0x6d/0x80
[ 426.145827] <EOI> [<ffffffff814e1b72>] ? cpuidle_enter_state+0x52/0xc0
[ 426.153044] [<ffffffff814e1b68>] ? cpuidle_enter_state+0x48/0xc0
[ 426.159612] [<ffffffff814e1c17>] cpuidle_enter+0x17/0x20
[ 426.165411] [<ffffffff810aa270>] cpu_startup_entry+0x2c0/0x3d0
[ 426.171810] [<ffffffff81639bc6>] rest_init+0xb6/0xc0
[ 426.177259] [<ffffffff81639b15>] ? rest_init+0x5/0xc0
[ 426.182778] [<ffffffff81d05f75>] start_kernel+0x43d/0x448
[ 426.188647] [<ffffffff81d05941>] ? repair_env_string+0x5c/0x5c
[ 426.195040] [<ffffffff81d05120>] ? early_idt_handlers+0x120/0x120
[ 426.201643] [<ffffffff81d055ee>] x86_64_start_reservations+0x2a/0x2c
[ 426.208575] [<ffffffff81d05733>] x86_64_start_kernel+0x143/0x152
[ 426.215176] ---[ end trace 515d2dd21a07f5dd ]---
[ 426.220078]
[ 426.221698] CPU#0: ctrl: 0000000000000000
[ 426.226591] CPU#0: status: 0000000000000000
[ 426.231480] CPU#0: overflow: 0000000000000000
[ 426.236361] CPU#0: fixed: 00000000000000b8
[ 426.241211] CPU#0: pebs: 0000000000000000
[ 426.246076] CPU#0: active: 0000000300000002
[ 426.250948] CPU#0: gen-PMC0 ctrl: 00000000001300c5
[ 426.256392] CPU#0: gen-PMC0 count: 0000000000088ff0
[ 426.261838] CPU#0: gen-PMC0 left: 0000fffffff77328
[ 426.267273] CPU#0: gen-PMC1 ctrl: 0000000000530254
[ 426.272727] CPU#0: gen-PMC1 count: 0000000000000001
[ 426.279307] CPU#0: gen-PMC1 left: 0000ffffffffffff
[ 426.285847] CPU#0: gen-PMC2 ctrl: 000000000013412e
[ 426.292354] CPU#0: gen-PMC2 count: 0000000000010545
[ 426.298874] CPU#0: gen-PMC2 left: 0000fffffffefb07
[ 426.305405] CPU#0: gen-PMC3 ctrl: 00000000001300c0
[ 426.311913] CPU#0: gen-PMC3 count: 0000000001699699
[ 426.318311] CPU#0: gen-PMC3 left: 0000fffffeaa1a64
[ 426.324715] CPU#0: fixed-PMC0 count: 0000fffffffffffe
[ 426.331093] CPU#0: fixed-PMC1 count: 0000fffe069f640d
[ 426.337399] CPU#0: fixed-PMC2 count: 0000000005cd7211
[ 426.343626] perf_event_intel: clearing PMU state on CPU#0
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