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Summary: [RHEL5]: virt-top doesn't show disk transfer statistics
https://bugzilla.redhat.com/show_bug.cgi?id=487533
Summary: [RHEL5]: virt-top doesn't show disk transfer statistics Product: Fedora EPEL Version: el5 Platform: All OS/Version: Linux Status: NEW Severity: medium Priority: low Component: virt-top AssignedTo: rjones@redhat.com ReportedBy: clalance@redhat.com QAContact: extras-qa@fedoraproject.org CC: rjones@redhat.com, fedora-virt-maint@redhat.com, fedora-ocaml-list@redhat.com Classification: Fedora Target Release: ---
Description of problem: Despite the work that went into RHEL-5.3 to show disk transfer statistics of blktap devices, virt-top is still not showing them. That is, if I start up virt-top on my dom0, I see output similar to:
virt-top 11:07:03 - x86_64 8/8CPU 2000MHz 15102MB 17 domains, 16 active, 4 running, 12 sleeping, 0 paused, 1 inactive D:0 O:0 X:0 CPU: 0.0% Mem: 12838 MB (11813 MB by guests)
ID S RDRQ WRRQ RXBY TXBY %CPU %MEM TIME NAME 0 R 0.0 6.0 52:14.09 Domain-0 27 S 0.0 6.0 1:50.03 f10pv_i386 26 R 0.0 5.0 2:21.34 f10pv_x86_64 13 S 0.0 5.0 10:15.87 f8pv_i386 14 S 0.0 5.0 11:21.37 f8pv_x86_64 11 S 0.0 5.0 22:22.51 f9pv_i386 12 S 0.0 5.0 20:35.55 f9pv_x86_64 29 S 0.0 5.0 2:30.98 rhel3fv_i386 37 R 0.0 5.0 2:42.97 rhel4fv_i386 38 S 0.0 5.0 0:48.74 rhel4fv_x86_64 7 S 0.0 5.0 6:41.64 rhel4pv_i386 8 S 0.0 5.0 13:03.53 rhel4pv_x86_64 21 S 0.0 5.0 27:49.61 rhel5fv_i386 36 R 0.0 5.0 2:46.24 rhel5fv_x86_64 39 S 0.0 5.0 0:38.62 rhel5pv_i386 40 S 0.0 5.0 0:37.07 rhel5pv_x86_64
But the RDRQ and WRRQ columns are always blank, for both FV and PV guests.
I'm not quite sure if this is a libvirt problem or a problem with virt-top itself, but I thought I'd start with virt-top and we can go from there.
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https://bugzilla.redhat.com/show_bug.cgi?id=487533
--- Comment #1 from Richard W.M. Jones rjones@redhat.com 2009-02-27 05:38:50 EDT --- I don't have my RHEL 5.3 box at the moment, but the easiest way to find out if it's virt-top or libvirt is to try listing the disk stats using virsh, ie:
virsh domblkstat <domain> <blkdev>
where <domain> is the domain name and <blkdev> is the target block device name from the XML, eg. hda or xvda
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https://bugzilla.redhat.com/show_bug.cgi?id=487533
--- Comment #2 from Richard W.M. Jones rjones@redhat.com 2009-02-27 08:47:55 EDT --- OK I had a look at this on my RHEL 5.3 machine and there is a problem. 'virsh domblkstat' works, at least for PV block devices (not for FV ones).
# virsh domblkstat F10PV64 xvda xvda rd_req 3550 xvda rd_bytes 61593088 xvda wr_req 405 xvda wr_bytes 5040128 xvda errs 0
# virsh domblkstat RHEL39FV32 xvdb xvdb rd_req 1 xvdb rd_bytes 4096 xvdb wr_req 0 xvdb wr_bytes 0 xvdb errs 0
# virsh domblkstat RHEL39FV32 hda libvir: Xen error : this function is not supported by the hypervisor: read_bd_stats: Frontend block device not connected error: Failed to get block stats RHEL39FV32 hda
But virt-top still doesn't see them. I'll have to take a closer look at the version of virt-top in EPEL to see what's wrong.
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https://bugzilla.redhat.com/show_bug.cgi?id=487533
Richard W.M. Jones rjones@redhat.com changed:
What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED
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https://bugzilla.redhat.com/show_bug.cgi?id=487533
ajia@redhat.com ajia@redhat.com changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |ajia@redhat.com
--- Comment #3 from ajia@redhat.com ajia@redhat.com 2009-04-22 01:39:54 EDT --- the problem is still exist on RHEL5.3 machine.and 'virsh domblkstat' works for xen PV block devices,but FV fail. (kernel:2.6.18-128.1.6.el5xen;libvirt-0.6.2-1.el5)
for PV: [root@dhcp-66-70-18 /]# virsh domblkstat test xvda xvda rd_req 5539 xvda rd_bytes 153436160 xvda wr_req 1289 xvda wr_bytes 9679872 xvda errs 0
for FV: [root@dhcp-66-70-18 domain]# virsh domblkstat test hda error: Failed to get block stats test hda error: internal error read_bd_stats: Frontend block device not connected
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Michael Stahnke mastahnke@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |mastahnke@gmail.com Status Whiteboard| |ActualBug
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https://bugzilla.redhat.com/show_bug.cgi?id=487533
Mark Chappell tremble@tremble.org.uk changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |tremble@tremble.org.uk Flag| |needinfo?
--- Comment #4 from Mark Chappell tremble@tremble.org.uk 2010-09-22 06:05:18 EDT --- Alex, Chris, Richard,
We're trying to do some tidying up of the EPEL bug list,
The whole virtualisation stack including virt-top has been significantly modified in the last 18 months is this bug still valid with the RHEL-5.5 and virt-top-1.0.4-3.1.el5?
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https://bugzilla.redhat.com/show_bug.cgi?id=487533
Richard W.M. Jones rjones@redhat.com changed:
What |Removed |Added ---------------------------------------------------------------------------- Flag|needinfo? |
--- Comment #5 from Richard W.M. Jones rjones@redhat.com 2010-09-22 06:32:05 EDT --- I've just checked and the bug is still present in RHEL 5.5.
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https://bugzilla.redhat.com/show_bug.cgi?id=487533
Richard W.M. Jones rjones@redhat.com changed:
What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |CLOSED Resolution| |DUPLICATE Last Closed| |2010-10-26 10:02:00
--- Comment #6 from Richard W.M. Jones rjones@redhat.com 2010-10-26 10:02:00 EDT ---
*** This bug has been marked as a duplicate of bug 597690 ***
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