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[0/4] trace-cmd: Fix up kvm time synchronization

Message ID 20220522003935.196466-1-rostedt@goodmis.org (mailing list archive)
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Series trace-cmd: Fix up kvm time synchronization | expand

Message

Steven Rostedt May 22, 2022, 12:39 a.m. UTC 
From: "Steven Rostedt (Google)" <rostedt@goodmis.org>

Fix the kvm time synchronization so that it works with the agent proxy. That
includes using "stat()" instead of just reading the content of the file to
see if they exist. Have the kvm time sync functions test for a valid VM
instead of just seeing if there are no failures, as no VMs or VCPUs would
pass when it should not. Set the proper role for the agent proxy.

Finally, mount the debugfs file system if it is not already mounted,
otherwise it will say that KVM time synchronization is not supported when it
actually is.

Steven Rostedt (Google) (4):
  trace-cmd kvm timesync: Use stat() in kvm_scaling_check_vm_cpu()
  trace-cmd kvm timesync: Check for one valid VM
  trace-cmd record: Set the proper role when connected to a proxy
  trace-cmd: Mount debugfs if needed for KVM data

 Makefile                           |  2 +-
 lib/trace-cmd/trace-timesync-kvm.c | 99 ++++++++++++++++++++++--------
 tracecmd/trace-record.c            |  6 +-
 3 files changed, 80 insertions(+), 27 deletions(-)