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

   1 <html>
   2 <body>
   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 (2) Add support for "stop" button in event list. (disabling event request
  20 scheduler)<br>
  21 (2) Finish pre-computing of states to a file.<br>
  22 (3) Add cluster support.<br>
  23         # <A HREF="mailto:Eric Clement <eric.clement@polymtl.ca>">Eric Clement</A><br>
  24 (3) Make LTTV aware of type formats (visual separators) defined in the XML
  25 file.<br>
  26 (3) Use a per architecture enumeration for traps.<br>
  27 (3) Change the byte pair "facility, event" id for a short combining the
  28 informatinon.<br>
  29 (4) Statistics per time window.<br>
  30 (4) Disable plugins when threshold reached (i.e. too much process in control
  31 flow view). Draw, and, when the threshold is reached, stop drawing. The global
  32 statistics view can inhibit showing the per process stats.<br>
  33 (4) Add a visual artifact : PID 0 could be named swapper instead of UNNAMED for
  34 cpus > 0.<br>
  35 (4) Add event specific fields support to filter.<br>
  36 (4) Add a periodic event interval view. (useful to verify event periodicity)<br>
  37 (4) create a graphical per cpu activity view.<br>
  38 (4) Add CPU, network, disk, memory usage histogram. [Per interval statistics]<br>
  39 (5) Add Python scripting hooks.<br>
  40 (5) Flight recorder : start lttd automatically upon GUI trace control stop.<br>
  41 (5) Automatically detect traces with too much processes and disable faulty operations.<br>
  42 (5) Event sequence detector (inspired from regular expressions).<br>
  43 (7) Create a hardware counter viewer (low cost rate counters : L1 cache miss,
  44 page faults, interrupts...). This will be a generalisation of the event rate
  45 view into a view of the evolution of a user definable event field.<br>
  46 <br>
  47 * TO FIX<br>
  48 (10) Event filter : event.time does not work.<br>
  49 (10) Add cancel button to LTTV filter GUI window.<br>
  50 (10) Sometimes, in the control flow view, a process with 0 creation time is
  51 created in addition to the real process itself. Seems to be caused by end of
  52 process life.<br>
  53 (10) Statistics do not take in account the time spent in the mode present at
  54 the beginning of the trace. Example : real time spent in system call on behalf
  55 of process 0.<br>
  56 <br>
  57 <br>
  58 <big>LTT Next Generation Roadmap<small><br>
  59 <br>
  60 * TODO<br>
  61 (3) Find a way to make logging know when it causes a minor page fault
  62 recursively (without ignoring silently all nested events).<br>
  63 (3) Change the byte pair "facility, event" id for a short combining the
  64 informatinon.<br>
  65 (4) Add Xen support.<br>
  66         # <A HREF="mailto:Mathieu Desnoyers <compudj@krystal.dyndns.org>">Mathieu Desnoyers</A><br>
  67         # <A HREF="mailto:Parisa Heidari <parisa.heidari@polymtl.ca>">Parisa Heidari</A><br>
  68 (4) efficient dynamic event filtering while recording trace.<br>
  69         % Sensis Corp. <A HREF="mailto:Bish, Tim <Tim.Bish@Sensis.com>">Tim Bish</A><br>
  70 (4) instrument kernel bottom half irqsave, spinlocks, rwlocks, seqlocks, semaphores, mutexes, brlock.<br>
  71 (4) Try to use my own non LOCK prefixed version of atomic operations : we are
  72 using per-CPU variables, so it should make it possible.<br>
  73 (4) integrate NPTL instrumentation (see
  74 <A HREF="http://nptltracetool.sourceforge.net/">PTT</A>).<br>
  75 (5) Support CPUs with scalable frequency.<br>
  76 (5) Integrate LTTng and lttd with LKCD.<br>
  77 (7) Integrate periodical dump of perfctr hardware counters.<br>
  78 (8) Integrate periodical dump of SystemTAP computed information.<br>
  79 (8) Integrate SystemTAP logging with LTTng.<br>
  80 (9) Add support for setjmp/longjmp and jump tables instrumentation to
  81 ltt-instrument-functions.<br>
  82 (9) Make ltt-usertrace-fast support internal heartbeat timer.<br>
  83 (3) port LTTng to :<br>
  84 x86_64<BR>
  85 #Autodesk <A HREF="mailto:Francois L'Archeveque <fla@discreet.com>">Francois
  86 L'Archeveque</A> for 2.6.9 RedHat Enterprise (patch available in contrib, still
  87 has to be ported to 2.6.14, thanks!)<BR>
  88 # Wind River for 2.6.14<BR>
  89 PPC<BR>
  90 PPC64<BR>
  91 # Wind River for 2.6.14<BR>
  92 alpha<BR>
  93 user-mode Linux<BR>
  94 Xen<BR>
  95 # IBM<BR>
  96 MIPS<BR>
  97 MIPS64<BR>
  98 % Wind River for 2.6.14<BR>
  99 # Tim Bird <A HREF="mailto:tim.bird@as.sony.com">Tim Bird</A><br>
 100 S/390<BR>
 101 RTLinux<BR>
 102 % Wind River for 2.6.14<BR>
 103 <br>
 104 <br>
 105 <br>
 106 * TODO (low priority)<br>
 107 enhance RPM packages for lttng kernel<br>
 108 Integrate header generation (genevent) in kernel build system.<br>
 109 Find a different way to printk from instrumentation : forbidden from schedule
 110 and wakeup (causes a deadlock). -> Modify printk so it uses LTTng tracer!<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 <br>
 127 * lttng patch division (0.5.10+) :<br>
 128 <br>
 129 instrumentation.diff<br>
 130 instrumentation-arm.diff<br>
 131 instrumentation-i386.diff<br>
 132 instrumentation-mips.diff<br>
 133 instrumentation-powerpc.diff<br>
 134 instrumentation-ppc.diff<br>
 135 instrumentation-s390.diff<br>
 136 instrumentation-sh.diff<br>
 137 ltt-facilities-headers.diff<br>
 138 ltt-facilities-loader.diff<br>
 139 ltt-facilities.diff<br>
 140 ltt-relayfs.diff<br>
 141 ltt-core.diff<br>
 142 ltt-build.diff<br>
 143 <br>
 144 <br>
 145 Mathieu Desnoyers<br>
 146
 147
 148 </body>
 149 </html>