ltt/branches/poly/doc/developer/lttng-lttv-roadmap.html

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   3 <center><big><big>LTTV & LTTng roadmap<small><small></center>
   4 <br>
   5 <br>
   6 Here are the roadmaps for the LTTV and LTTng development. I use a priority indice
   7 for the TODO items :<br>
   8 (1) : very high priority<br>
   9 (10): lowest priority<br>
  10 <br>
  11 <br>
  12 Dependencies are written between brackets [ ].<br>
  13 The # symbol marks who is currently working on the item.<br>
  14 The % symbol marks who is interested in the realisation of the item.<br>
  15 <br>
  16 <big>LTTV Roadmap<small><br>
  17 <br>
  18 * TODO<br>
  19 (3) Add cluster support.<br>
  20         # <A HREF="mailto:Eric Clement <eric.clement@polymtl.ca>">Eric Clement</A><br>
  21 (3) Make LTTV aware of type formats (visual separators) defined in the XML
  22 file.<br>
  23         # <A HREF="mailto:Gabriel Matni <gabrien.matni@polymtl.ca>">Gabriel
  24         # Matni</A><br>
  25 (3) Use a per architecture enumeration for traps.<br>
  26 (3) Change the byte pair "facility, event" id for a short combining the
  27 informatinon.<br>
  28 (4) Statistics per time window.<br>
  29 (4) Add Xen per physical CPU view.<br>
  30 (4) Add Xen per vcpu view.<br>
  31 (4) Disable plugins when threshold reached (i.e. too much process in control
  32 flow view). Draw, and, when the threshold is reached, stop drawing. The global
  33 statistics view can inhibit showing the per process stats.<br>
  34 (4) Add a visual artifact : PID 0 could be named swapper instead of UNNAMED for
  35 cpus > 0.<br>
  36 (4) Add event specific fields support to filter.<br>
  37 (4) Add a periodic event interval view. (useful to verify event periodicity)<br>
  38 (4) create a graphical per cpu activity view.<br>
  39 (4) Filter by target process.<br>
  40 (4) Compensate for time spent in probes in LTTV analysis.<br>
  41 (4) Add CPU, network, disk, memory usage histogram. [Per interval statistics]<br>
  42 (5) Add Python scripting hooks.<br>
  43 (5) Add GUI interface to take an hybrid trace.<br>
  44 (5) Flight recorder : start lttd automatically upon GUI trace control stop.<br>
  45 (5) Automatically detect traces with too much processes and disable faulty operations.<br>
  46 (5) Event sequence detector (inspired from regular expressions).<br>
  47 (7) Create a hardware counter viewer (low cost rate counters : L1 cache miss,
  48 page faults, interrupts...). This will be a generalisation of the event rate
  49 view into a view of the evolution of a user definable event field.<br>
  50 <br>
  51 * TO FIX<br>
  52 (10) Add cancel button to LTTV filter GUI window.<br>
  53 (10) Sometimes, in the control flow view, a process with 0 creation time is
  54 created in addition to the real process itself. Seems to be caused by end of
  55 process life.<br>
  56 (10) Statistics do not take in account the time spent in the mode present at
  57 the beginning of the trace. Example : real time spent in system call on behalf
  58 of process 0.<br>
  59 <br>
  60 <br>
  61 <big>LTT Next Generation Roadmap<small><br>
  62 <br>
  63 * TODO<br>
  64 (1) efficient dynamic event filtering while recording trace.<br>
  65         % Google
  66         % Sensis Corp. <A HREF="mailto:Bish, Tim <Tim.Bish@Sensis.com>">Tim Bish</A><br>
  67         # <A HREF="mailto:Mathieu Desnoyers <compudj@krystal.dyndns.org>">Mathieu Desnoyers</A><br>
  68 (1) Support for compact event trace channel.<br>
  69         % Google
  70         # <A HREF="mailto:Mathieu Desnoyers <compudj@krystal.dyndns.org>">Mathieu Desnoyers</A><br>
  71 (1) CPU Hotplug support. (Only ltt-heartbeat needs to be fixed).<br>
  72         # <A HREF="mailto:Mathieu Desnoyers <compudj@krystal.dyndns.org>">Mathieu Desnoyers</A><br>
  73 (1) Add Xen support. (Trace buffer desallocation needs to be fixed)<br>
  74         # <A HREF="mailto:Mathieu Desnoyers <compudj@krystal.dyndns.org>">Mathieu Desnoyers</A><br>
  75 (1) Integrate SystemTAP logging with LTTng.<br>
  76 (3) Change the byte pair "facility, event" id for a short combining the
  77 informatinon.<br>
  78 (4) instrument kernel bottom half irqsave, spinlocks, rwlocks, seqlocks, semaphores, mutexes, brlock.<br>
  79 (4) integrate NPTL instrumentation (see
  80 <A HREF="http://nptltracetool.sourceforge.net/">PTT</A>).<br>
  81 (4) Probe calibration kernel module.<br>
  82 (4) Make page faults detect nested fault without nesting 4 times in the page
  83 fault handler.<br>
  84 (5) Support CPUs with scalable frequency.<br>
  85 (5) Add boot time tracing support.<br>
  86 (5) Integrate LTTng and lttd with LKCD.<br>
  87 (7) Integrate periodical dump of perfctr hardware counters.<br>
  88 (8) Integrate periodical dump of SystemTAP computed information.<br>
  89 (9) Rethink facility logging code (genevent output). Maybe unneeded because of
  90 markers/probes mechanism.<br>
  91 (9) Add support for setjmp/longjmp and jump tables instrumentation to
  92 ltt-instrument-functions.<br>
  93 (9) Make ltt-usertrace-fast support internal heartbeat timer.<br>
  94 (3) port LTTng to :<br>
  95 alpha<BR>
  96 user-mode Linux<BR>
  97 Xen<BR>
  98 # IBM<BR>
  99 S/390<BR>
 100 RTLinux<BR>
 101 % Wind River for 2.6.14<BR>
 102 sparc64<BR>
 103 # Wind River<BR>
 104 sh4<br>
 105 <br>
 106 <br>
 107 <br>
 108 * TODO (low priority)<br>
 109 enhance RPM packages for lttng kernel<br>
 110 Integrate header generation (genevent) in kernel build system.<br>
 111 Export channels via network sockets instead of writing them to disk.<br>
 112 Export buffers with time constraint for "live" visualisation. Use
 113 ltt_force_switch periodically from a timer to insure slow channels do not
 114 interfere with viewing.<br>
 115 Have an optional round-robin mode to write information into multiple channels
 116 from the same source.<br>
 117 <br>
 118 * Need to be discussed<br>
 119 Use 2.6.14 RelayFS control files.<br>
 120 Drop ltt-module-register and ltt-module-unregister, use exported variables.<br>
 121 drop ltt_filter_control, use functions pointers instead.<br>
 122 Merge facilities headers into one big header.<br>
 123 Change the name of XML files from XML to something else.<br>
 124 Remove ltt-base.c.<br>
 125 <br>
 126 Mathieu Desnoyers<br>
 127
 128
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