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1 | <html> |
| 2 | <body> |
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3 | <center><big><big>LTTV & LTTng roadmap<small><small></center> |
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4 | <br> |
| 5 | <br> |
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6 | Here are the roadmaps for the LTTV and LTTng development. I use a priority indice |
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7 | for the TODO items :<br> |
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8 | (1) : very high priority<br> |
| 9 | (10): lowest priority<br> |
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10 | <br> |
| 11 | <br> |
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12 | Dependencies are written between brackets [ ].<br> |
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13 | The # symbol marks who is currently working on the item.<br> |
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14 | The % symbol marks who is interested in the realisation of the item.<br> |
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15 | <br> |
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16 | <big>LTTV Roadmap<small><br> |
| 17 | <br> |
| 18 | * TODO<br> |
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19 | (1) Put back coherent facility checksumming.<br> |
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20 | (3) Add cluster support.<br> |
| 21 | # <A HREF="mailto:Eric Clement <eric.clement@polymtl.ca>">Eric Clement</A><br> |
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22 | (3) Make LTTV aware of type formats (visual separators) defined in the XML |
| 23 | file.<br> |
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24 | # <A HREF="mailto:Gabriel Matni <gabrien.matni@polymtl.ca>">Gabriel Matni</A><br> |
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25 | (3) Use a per architecture enumeration for traps.<br> |
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26 | (3) Change the byte pair "facility, event" id for a short combining the |
| 27 | informatinon.<br> |
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28 | (4) Statistics per time window.<br> |
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29 | (4) Add Xen per physical CPU view.<br> |
| 30 | (4) Add Xen per vcpu view.<br> |
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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> |
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34 | (4) Add a visual artifact : PID 0 could be named swapper instead of UNNAMED for |
| 35 | cpus > 0.<br> |
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36 | (4) Add event specific fields support to filter.<br> |
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37 | (4) Add a periodic event interval view. (useful to verify event periodicity)<br> |
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38 | (4) create a graphical per cpu activity view.<br> |
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39 | (4) Filter by target process.<br> |
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40 | (4) Compensate for time spent in probes in LTTV analysis.<br> |
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41 | (4) Add CPU, network, disk, memory usage histogram. [Per interval statistics]<br> |
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42 | (5) Add Python scripting hooks.<br> |
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43 | (5) Add GUI interface to take an hybrid trace.<br> |
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44 | (5) Flight recorder : start lttd automatically upon GUI trace control stop.<br> |
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45 | (5) Automatically detect traces with too much processes and disable faulty operations.<br> |
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46 | (5) Event sequence detector (inspired from regular expressions).<br> |
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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> |
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50 | <br> |
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51 | * TO FIX<br> |
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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> |
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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> |
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59 | <br> |
| 60 | <br> |
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61 | <big>LTT Next Generation Roadmap<small><br> |
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62 | <br> |
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63 | * TODO<br> |
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64 | (1) put probes in a hash table so we can connect the markers to them upon module |
| 65 | load.<br> |
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66 | (1) efficient dynamic event filtering while recording trace.<br> |
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67 | % Google<br> |
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68 | % Sensis Corp. <A HREF="mailto:Bish, Tim <Tim.Bish@Sensis.com>">Tim Bish</A><br> |
| 69 | # <A HREF="mailto:Mathieu Desnoyers <compudj@krystal.dyndns.org>">Mathieu Desnoyers</A><br> |
| 70 | (1) Support for compact event trace channel.<br> |
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71 | % Google<br> |
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72 | # <A HREF="mailto:Mathieu Desnoyers <compudj@krystal.dyndns.org>">Mathieu Desnoyers</A><br> |
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73 | (1) CPU Hotplug support. (Only ltt-heartbeat needs to be fixed).<br> |
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74 | # <A HREF="mailto:Mathieu Desnoyers <compudj@krystal.dyndns.org>">Mathieu Desnoyers</A><br> |
| 75 | (1) Add Xen support. (Trace buffer desallocation needs to be fixed)<br> |
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76 | # <A HREF="mailto:Mathieu Desnoyers <compudj@krystal.dyndns.org>">Mathieu Desnoyers</A><br> |
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77 | (1) Integrate SystemTAP logging with LTTng.<br> |
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78 | (3) Change the byte pair "facility, event" id for a short combining the |
| 79 | informatinon.<br> |
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80 | (4) instrument kernel bottom half irqsave, spinlocks, rwlocks, seqlocks, semaphores, mutexes, brlock.<br> |
| 81 | (4) integrate NPTL instrumentation (see |
| 82 | <A HREF="http://nptltracetool.sourceforge.net/">PTT</A>).<br> |
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83 | (4) Probe calibration kernel module.<br> |
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84 | (4) Make page faults detect nested fault without nesting 4 times in the page |
| 85 | fault handler.<br> |
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86 | (5) Support CPUs with scalable frequency.<br> |
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87 | (5) Add boot time tracing support.<br> |
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88 | (5) Integrate LTTng and lttd with LKCD.<br> |
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89 | (7) Integrate periodical dump of perfctr hardware counters.<br> |
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90 | (8) Integrate periodical dump of SystemTAP computed information.<br> |
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91 | (9) Rethink facility logging code (genevent output). Maybe unneeded because of |
| 92 | markers/probes mechanism.<br> |
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93 | (9) Add support for setjmp/longjmp and jump tables instrumentation to |
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94 | ltt-instrument-functions.<br> |
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95 | (9) Make ltt-usertrace-fast support internal heartbeat timer.<br> |
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96 | (3) port LTTng to :<br> |
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97 | alpha<BR> |
| 98 | user-mode Linux<BR> |
| 99 | Xen<BR> |
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100 | # IBM<BR> |
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101 | S/390<BR> |
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102 | RTLinux<BR> |
| 103 | % Wind River for 2.6.14<BR> |
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104 | sparc64<BR> |
| 105 | # Wind River<BR> |
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106 | sh4<br> |
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107 | <br> |
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108 | <br> |
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109 | <br> |
| 110 | * TODO (low priority)<br> |
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111 | enhance RPM packages for lttng kernel<br> |
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112 | Integrate header generation (genevent) in kernel build system.<br> |
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113 | Export channels via network sockets instead of writing them to disk.<br> |
| 114 | Export buffers with time constraint for "live" visualisation. Use |
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115 | ltt_force_switch periodically from a timer to insure slow channels do not |
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116 | interfere with viewing.<br> |
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117 | Have an optional round-robin mode to write information into multiple channels |
| 118 | from the same source.<br> |
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119 | <br> |
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120 | * Need to be discussed<br> |
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121 | Use 2.6.14 RelayFS control files.<br> |
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122 | Drop ltt-module-register and ltt-module-unregister, use exported variables.<br> |
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123 | drop ltt_filter_control, use functions pointers instead.<br> |
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124 | Merge facilities headers into one big header.<br> |
| 125 | Change the name of XML files from XML to something else.<br> |
| 126 | Remove ltt-base.c.<br> |
| 127 | <br> |
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128 | Mathieu Desnoyers<br> |
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129 | |
| 130 | |
| 131 | </body> |
| 132 | </html> |
projects / lttv.git / blame