[Bug runtime/7043] New: Support unified trace buffer

[Bug runtime/7043] New: Support unified trace buffer

[mhiramat at redhat dot com]

Support unified trace buffer instead of relayfs, since relay will be replaced by it.

see kernel/trace/ring_buffer.c.

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           Summary: Support unified trace buffer
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: runtime
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: mhiramat at redhat dot com
OtherBugsDependingO 7042
             nThis:


http://sourceware.org/bugzilla/show_bug.cgi?id=7043

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[Bug runtime/7043] Support unified trace buffer

[mhiramat at redhat dot com]

------- Additional Comments From mhiramat at redhat dot com  2008-12-23 22:43 -------
I think there might be another plan that stap generates ftrace-plug-in tracer
instead of using ring-buffer directly.

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=7043

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[Bug runtime/7043] Support unified trace buffer

[fche at redhat dot com]

------- Additional Comments From fche at redhat dot com  2009-01-29 16:36 -------
*** Bug 9801 has been marked as a duplicate of this bug. ***

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           What    |Removed                     |Added
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                 CC|                            |fche at redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=7043

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[Bug runtime/7043] Support unified trace buffer

[fche at redhat dot com]

------- Additional Comments From fche at redhat dot com  2009-01-29 22:55 -------
Let's assess whether the ring buffer widget, or the larger control
structures around it in ftrace, are relevant/useful to systemtap.

We need at least:
- access to the ftrace buffering stuff from modules
- the ring buffers need to contain formatted ascii, since that is what scripts
  produce, and not rely on subsequent trace_iter printing like current ftrace
  engines; maybe reuse ftrace_printk
- per-script trace files (instead of /debugfs/tracing/trace intermingled) ...
  unless some goofy multiplexing is the only way
- probably no connection with the overall control switch
  /tracing/tracing_enabled), since scripts come and go at any time


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           What    |Removed                     |Added
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         AssignedTo|systemtap at sources dot    |dsmith at redhat dot com
                   |redhat dot com              |
             Status|NEW                         |ASSIGNED


http://sourceware.org/bugzilla/show_bug.cgi?id=7043

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