Re: [libvirt] [PATCH 0/7] Update systemtap probing
I believe enable systemtap will be very helpful for debugging.But I encountered belowing error when enable systemtap support: *emantic error: probe point mismatch at position 0 (alternatives: __nfs __scheduler __signal __tcpmib __vm _linuxmib _signal _sunrpc _syscall _vfs begin begin(number) end end(number) error error(number) generic ioblock ioblock_trace ioscheduler ioscheduler_trace ipmib irq_handler kernel kprobe kprocess linuxmib module(string) nd_syscall netdev never nfs nfsd perf process process(number) process(string) procfs procfs(string) scheduler scsi signal socket softirq stap staprun sunrpc syscall tcp tcpmib timer tty udp vfs vm workqueue): identifier 'libvirt' at :130:7 while resolving probe point libvirt.event_poll.run source: probe libvirt.event_poll.run { ^ Pass 2: analysis failed. Try again with another '--vp 01' option. *Here's my environment: * Ubuntu 11.04 amd64 configured --with-dtrace --enable-shared=no --with-pic(fPIC flag also tried) dtrace installed and compile probe with dtrace -64* Would somebody pls give me some advice with this systemtap issue? Thanks a lot!
On Wed, Oct 26, 2011 at 01:50:04PM +0800, lvroyce wrote:
I believe enable systemtap will be very helpful for debugging.But I encountered belowing error when enable systemtap support:
*emantic error: probe point mismatch at position 0 (alternatives: __nfs __scheduler __signal __tcpmib __vm _linuxmib _signal _sunrpc _syscall _vfs begin begin(number) end end(number) error error(number) generic ioblock ioblock_trace ioscheduler ioscheduler_trace ipmib irq_handler kernel kprobe kprocess linuxmib module(string) nd_syscall netdev never nfs nfsd perf process process(number) process(string) procfs procfs(string) scheduler scsi signal socket softirq stap staprun sunrpc syscall tcp tcpmib timer tty udp vfs vm workqueue): identifier 'libvirt' at :130:7 while resolving probe point libvirt.event_poll.run source: probe libvirt.event_poll.run { ^ Pass 2: analysis failed. Try again with another '--vp 01' option.
*Here's my environment: * Ubuntu 11.04 amd64 configured --with-dtrace --enable-shared=no --with-pic(fPIC flag also tried) dtrace installed and compile probe with dtrace -64*
Would somebody pls give me some advice with this systemtap issue?
This means the libvirt_probes.stp file was not found in /usr/share/systemtap/tapset. Presumably you didn't do a 'make install' step, or you didn't set --prefix=/usr when building. If you installed into a different directory, you can try doing 'stap -I/your/other/location/share/systemtap/tapset demo.stp' Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|
Tested by:Royce Lv<lvroyce@linux.vnet.ibm.com> I'm not sure whether I encountered are env/config related problem or bugs,so I submit my installation process here for you to reference. 1.env description: host os:Ubuntu 11.04(kernel 2.6.38-8-generic,x86_64) libvirt:0.9.6 qemu:0.15.50 dtrace:sun D 1.6 systemtap:version 1.3/0.148 non-git sources 2.install systemtaped libvirt (1)configure ./configure --prefix=/usr --with-dtrace (2)make --->error1: dtrace: failed to compile script probes.d: line 2: invalid control directive: #file: solution: delete lines begin with "#" -->error2: Invoking: ld -o probes.o -r probes.tmp.o /usr/lib/dtrace/drti.o ld: i386 architecture of input file `probes.tmp.o' is incompatible with i386:x86-64 output dtrace: failed to link script probes.d: failed to link probes.o: ld exited with status 1 ????so the script incompatible for 64 system,is it a bug? solution: change "DTRACE=/usr/bin/dtrace" to "DTRACE=/usr/bin/dtrace -64" -->error3:(with ./configure --prefix=/usr --enable-dtrace) *** objects probes.o is not portable! /usr/bin/ld: probes.o: relocation R_X86_64_32 against `.rodata' can not be used when making a shared object; recompile with -fPIC probes.o: could not read symbols: Bad value tried: (1)reconfig with ./configure --with-dtrace --disable-share result: compile success,but libvirt_probes.stp size is 0,stp script can't be used (2)add flags with -fPIC result: nothing changed,still the same error (3)tried configure --with-pic result: nothing changed,still the same error 3.Here is my question: (1)Is the system-enabled libvirt support 64bit system? (2)Do you have suggestion about error3? Sorry to bother you so many times,But I do think applying these patches are important and useful for future debugging.Thank you for your time!
On Fri, Oct 28, 2011 at 04:29:47PM +0800, lvroyce wrote:
Tested by:Royce Lv<lvroyce@linux.vnet.ibm.com>
I'm not sure whether I encountered are env/config related problem or bugs,so I submit my installation process here for you to reference.
1.env description: host os:Ubuntu 11.04(kernel 2.6.38-8-generic,x86_64) libvirt:0.9.6 qemu:0.15.50 dtrace:sun D 1.6
Huh ? Where do you get this Sun dtrace binary from ? The dtrace binary should be the one provided by *systemtap*.
systemtap:version 1.3/0.148 non-git sources
Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|
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lvroyce