Bug 604732

Description of problem:

Attempted to follow the steps listed http://lwn.net/Articles/383334/ to try out RHEL-6 trace-cmd. 

Version-Release number of selected component (if applicable):

trace-cmd-1.0.1-5.el6.x86_64

How reproducible:

All the time


Steps to Reproduce:
1. trace-cmd record -p function ls
2. trace-cmd report

  
Actual results:

# trace-cmd record -p function ls
  plugin function
disable all
anaconda-ks.cfg  install.log.syslog  trace.dat.cpu0  trace.dat.cpu2
install.log	 trace.dat	     trace.dat.cpu1  trace.dat.cpu3
offset=380000
offset=41c000
offset=46d000
offset=55e000
Kernel buffer statistics:
  Note: "entries" are the entries left in the kernel ring buffer and are not
        recorded in the trace data. They should all be zero.

CPU: 0
entries: 0
overrun: 0
commit overrun: 0

CPU: 1
entries: 0
overrun: 0
commit overrun: 0

CPU: 2
entries: 0
overrun: 0
commit overrun: 0

CPU: 3
entries: 0
overrun: 0
commit overrun: 0

# trace-cmd report
version = 6
trace-cmd: No such file or directory
  bad op token {
  failed to read event print fmt for kvm_mmu_get_page
  bad op token {
  failed to read event print fmt for kvm_mmu_sync_page
  bad op token {
  failed to read event print fmt for kvm_mmu_unsync_page
  bad op token {
  failed to read event print fmt for kvm_mmu_zap_page
  Error: expected type 4 but read 7
  Error: expected type 5 but read 0
  failed to read event print fmt for kvm_apic
  function ftrace_print_symbols_seq not defined
  failed to read event print fmt for kvm_exit
  function scsi_trace_parse_cdb not defined
  failed to read event print fmt for scsi_dispatch_cmd_start
  function scsi_trace_parse_cdb not defined
  failed to read event print fmt for scsi_dispatch_cmd_error
  Error: expected 'name' but read 'FORMAT'
  failed to read event name


Expected results:

No complaint "No such file or directory"
And output of data.


Additional info:

Note that the upstream trace-cmd from the git repository works generates some useful output with the same trace.dat:

# ~wcohen/research/profiling/trace-cmd/trace-cmd/trace-cmd report |more
trace-cmd: No such file or directory
  bad op token {
  failed to read event print fmt for kvm_mmu_get_page
  bad op token {
  failed to read event print fmt for kvm_mmu_sync_page
  bad op token {
  failed to read event print fmt for kvm_mmu_unsync_page
  bad op token {
  failed to read event print fmt for kvm_mmu_zap_page
  Error: expected type 4 but read 7
  Error: expected type 5 but read 0
  failed to read event print fmt for kvm_apic
  function ftrace_print_symbols_seq not defined
  failed to read event print fmt for kvm_exit
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_free_inode
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_request_inode
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_allocate_inode
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_write_begin
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_da_write_begin
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_ordered_write_end
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_writeback_write_end
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_journalled_write_end
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_da_write_end
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_writepage
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_da_writepages
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_da_write_pages
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_da_writepages_result
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_discard_blocks
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_mb_new_inode_pa
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_mb_new_group_pa
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_mb_release_inode_pa
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_mb_release_group_pa
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_discard_preallocations
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_mb_discard_preallocations
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_request_blocks
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_allocate_blocks
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_free_blocks
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_sync_file
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_sync_fs
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_alloc_da_blocks
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_mballoc_alloc
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_mballoc_prealloc
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_mballoc_discard
  function jbd2_dev_to_name not defined
  failed to read event print fmt for ext4_mballoc_free
  function jbd2_dev_to_name not defined
  failed to read event print fmt for jbd2_checkpoint
  function jbd2_dev_to_name not defined
  failed to read event print fmt for jbd2_start_commit
  function jbd2_dev_to_name not defined
  failed to read event print fmt for jbd2_commit_locking
  function jbd2_dev_to_name not defined
  failed to read event print fmt for jbd2_commit_flushing
  function jbd2_dev_to_name not defined
  failed to read event print fmt for jbd2_commit_logging
  function jbd2_dev_to_name not defined
  failed to read event print fmt for jbd2_end_commit
  function jbd2_dev_to_name not defined
  failed to read event print fmt for jbd2_submit_inode_data
  function jbd2_dev_to_name not defined
  failed to read event print fmt for jbd2_run_stats
  function jbd2_dev_to_name not defined
  failed to read event print fmt for jbd2_checkpoint_stats
  function scsi_trace_parse_cdb not defined
  failed to read event print fmt for scsi_dispatch_cmd_start
  function scsi_trace_parse_cdb not defined
  failed to read event print fmt for scsi_dispatch_cmd_error
  Error: expected 'name' but read 'FORMAT'
  Error: expected 'name' but read 'FORMAT'
  unknown op '{'
  failed to read event print fmt for hrtimer_start
  unknown op '{'
  failed to read event print fmt for hrtimer_expire_entry
version = 6
cpus=4
     ibus-daemon-3003  [000]  6786.516169: function:             sock_poll <-- d
o_sys_poll
              ls-16248 [003]  6786.516169: function:             inotify_inode_q
ueue_event <-- vfs_write