* registration error + probe overhead exceeded threshold error.....
@ 2009-04-12 16:09 Peter Teoh
2009-04-16 20:31 ` Frank Ch. Eigler
0 siblings, 1 reply; 3+ messages in thread
From: Peter Teoh @ 2009-04-12 16:09 UTC (permalink / raw)
To: SystemTAP
While stap my script, i got the following errors - can someone explain why?
error 1: registration error
error 2: ERROR: probe overhead exceeded threshold
Thanks!!!
WARNING: probe module("kvm").function("kvm_vcpu_init@arch/x86/kvm/../../../virt/kvm/kvm_main.c:617").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=153
WARNING: probe module("kvm").function("kvm_handle_fault_on_reboot@arch/x86/kvm/../../../virt/kvm/kvm_main.c:2103").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=143
WARNING: probe module("kvm").function("kvm_vcpu_release@arch/x86/kvm/../../../virt/kvm/kvm_main.c:1517").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=147
WARNING: probe module("kvm").function("kvm_free_physmem_slot@arch/x86/kvm/../../../virt/kvm/kvm_main.c:840").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=139
WARNING: probe module("kvm").function("kvm_vm_fault@arch/x86/kvm/../../../virt/kvm/kvm_main.c:1931").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=139
WARNING: probe module("kvm").function("kvm_vm_ioctl@arch/x86/kvm/../../../virt/kvm/kvm_main.c:1793").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=95
WARNING: probe module("kvm").function("kvm_io_bus_init").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=95
WARNING: probe module("kvm").function("kvm_is_mmio_pfn").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=145
WARNING: probe module("kvm").function("kvm_set_page_dirty@arch/x86/kvm/../../../virt/kvm/kvm_main.c:1279").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=135
WARNING: probe module("kvm").function("kvm_exit@arch/x86/kvm/../../../virt/kvm/kvm_main.c:2389").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=142
WARNING: probe module("kvm").function("kvm_free_physmem@arch/x86/kvm/../../../virt/kvm/kvm_main.c:857").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=147
WARNING: probe module("kvm").function("kvm_set_pfn_accessed@arch/x86/kvm/../../../virt/kvm/kvm_main.c:1295").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=144
WARNING: probe module("kvm").function("kvm_set_pfn_dirty@arch/x86/kvm/../../../virt/kvm/kvm_main.c:1285").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=140
WARNING: probe module("kvm").function("kvm_dev_ioctl@arch/x86/kvm/../../../virt/kvm/kvm_main.c:2001").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=138
WARNING: probe module("kvm").function("kvm_suspend@arch/x86/kvm/../../../virt/kvm/kvm_main.c:2238").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=139
WARNING: probe module("kvm").function("kvm_sched_in@arch/x86/kvm/../../../virt/kvm/kvm_main.c:2270").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=141
WARNING: probe module("kvm").function("kvm_exit_debug@arch/x86/kvm/../../../virt/kvm/kvm_main.c:2229").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=142
WARNING: probe module("kvm").function("kvm_cpu_hotplug@arch/x86/kvm/../../../virt/kvm/kvm_main.c:2077").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=141
WARNING: probe module("kvm").function("kvm_vcpu_block@arch/x86/kvm/../../../virt/kvm/kvm_main.c:1453").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=163
WARNING: probe module("kvm").function("kvm_mmu_notifier_invalidate_range_end@arch/x86/kvm/../../../virt/kvm/kvm_main.c:723").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=164
WARNING: probe module("kvm").function("kvm_assigned_dev_interrupt_work_handler@arch/x86/kvm/../../../virt/kvm/kvm_main.c:99").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=141
WARNING: probe module("kvm").function("kvm_read_guest@arch/x86/kvm/../../../virt/kvm/kvm_main.c:1333").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=145
WARNING: probe module("kvm").function("kvm_io_bus_destroy@arch/x86/kvm/../../../virt/kvm/kvm_main.c:2139").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=148
WARNING: probe module("kvm").function("kvm_read_guest_atomic@arch/x86/kvm/../../../virt/kvm/kvm_main.c:1354").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=147
WARNING: probe module("kvm").function("kvm_write_guest_page@arch/x86/kvm/../../../virt/kvm/kvm_main.c:1374").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=147
WARNING: probe module("kvm").function("kvm_flush_remote_tlbs@arch/x86/kvm/../../../virt/kvm/kvm_main.c:606").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=148
WARNING: probe module("kvm").function("kvm_reload_remote_mmus@arch/x86/kvm/../../../virt/kvm/kvm_main.c:612").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=158
WARNING: probe module("kvm").function("kvm_mmu_notifier_invalidate_page@arch/x86/kvm/../../../virt/kvm/kvm_main.c:662").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=140
WARNING: probe module("kvm").function("kvm_vcpu_mmap@arch/x86/kvm/../../../virt/kvm/kvm_main.c:1511").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=148
WARNING: probe module("kvm").function("kvm_release_pfn_dirty@arch/x86/kvm/../../../virt/kvm/kvm_main.c:1272").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=150
WARNING: probe module("kvm").function("kvm_io_bus_register_dev@arch/x86/kvm/../../../virt/kvm/kvm_main.c:2165").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=150
WARNING: probe module("kvm").function("kvm_mmu_notifier_release@arch/x86/kvm/../../../virt/kvm/kvm_main.c:764").call
registration error (rc -22)
stapio:stp_main_loop:443 nb=46
ERROR: probe overhead exceeded threshold
--
Regards,
Peter Teoh
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: registration error + probe overhead exceeded threshold error.....
2009-04-12 16:09 registration error + probe overhead exceeded threshold error Peter Teoh
@ 2009-04-16 20:31 ` Frank Ch. Eigler
2009-04-17 6:06 ` Peter Teoh
0 siblings, 1 reply; 3+ messages in thread
From: Frank Ch. Eigler @ 2009-04-16 20:31 UTC (permalink / raw)
To: Peter Teoh; +Cc: SystemTAP
Peter Teoh <htmldeveloper@gmail.com> writes:
> While stap my script, i got the following errors - can someone explain why?
>
> error 1: registration error
> error 2: ERROR: probe overhead exceeded threshold
>
> WARNING: probe module("kvm").function("kvm_vcpu_init@arch/x86/kvm/../../../virt/kvm/kvm_main.c:617").call
> registration error (rc -22)
This can occur normally for functions marked with init/exit/kprobes
types of annotations. It could occur abnormally for other functions,
but the message doesn't help clarify (PR 10075).
> [...]
> ERROR: probe overhead exceeded threshold
This means that a bunch of probes were in fact registered and
activated, but they are taking so long to run that overload-detection
logic was triggered. See the stap.1 man page for tuning or disabling
the thresholds.
- FChE
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: registration error + probe overhead exceeded threshold error.....
2009-04-16 20:31 ` Frank Ch. Eigler
@ 2009-04-17 6:06 ` Peter Teoh
0 siblings, 0 replies; 3+ messages in thread
From: Peter Teoh @ 2009-04-17 6:06 UTC (permalink / raw)
To: Frank Ch. Eigler; +Cc: SystemTAP
Thank you Frank, let me probe further into your comments......lots of
things to learn :-).....thank you.
On Fri, Apr 17, 2009 at 4:31 AM, Frank Ch. Eigler <fche@redhat.com> wrote:
> Peter Teoh <htmldeveloper@gmail.com> writes:
>
>> While stap my script, i got the following errors - can someone explain why?
>>
>> error 1: registration error
>> error 2: ERROR: probe overhead exceeded threshold
>>
>> WARNING: probe module("kvm").function("kvm_vcpu_init@arch/x86/kvm/../../../virt/kvm/kvm_main.c:617").call
>> registration error (rc -22)
>
> This can occur normally for functions marked with init/exit/kprobes
> types of annotations. It could occur abnormally for other functions,
> but the message doesn't help clarify (PR 10075).
>
>
>> [...]
>> ERROR: probe overhead exceeded threshold
>
> This means that a bunch of probes were in fact registered and
> activated, but they are taking so long to run that overload-detection
> logic was triggered. See the stap.1 man page for tuning or disabling
> the thresholds.
>
>
> - FChE
>
--
Regards,
Peter Teoh
^ permalink raw reply [flat|nested] 3+ messages in thread
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2009-04-16 20:31 ` Frank Ch. Eigler
2009-04-17 6:06 ` Peter Teoh
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