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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 | <br> |
| 17 | <big>LTT Next Generation Roadmap<small><br> |
| 18 | <br> |
| 19 | * TODO<br> |
| 20 | (1) Get lttng ascii dump to work.<br> |
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21 | # <A HREF="mailto:Lai Jiangshan <laijs@cn.fujitsu.com>">Lai Jiangshan</A><br> |
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22 | - Create periodical buffer flush per-cpu timer for data streaming.<br> |
| 23 | # <A HREF="mailto:Mathieu Desnoyers <compudj@krystal.dyndns.org>">Mathieu Desnoyers</A><br> |
| 24 | - Modify LTTng/lttd/lttv to support variable-sized buffers.<br> |
| 25 | # <A HREF="mailto:Mathieu Desnoyers <compudj@krystal.dyndns.org>">Mathieu Desnoyers</A><br> |
| 26 | (1) Support CPUs with scalable frequency.<br> |
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27 | (1) Post core set of patches to LKML for mainlining.<br> |
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28 | (2) Create 3rd generation of userspace tracing.<br> |
| 29 | (3) Bring stack dump in sync with new lttng.<br> |
| 30 | (4) Dump mounts. (to fix)<br> |
| 31 | (4) Add Xen support. (Trace buffer desallocation needs to be fixed)<br> |
| 32 | (4) integrate NPTL instrumentation (see |
| 33 | <A HREF="http://nptltracetool.sourceforge.net/">PTT</A>).<br> |
| 34 | (4) Probe calibration kernel module.<br> |
| 35 | (4) Make page faults detect nested fault without nesting 4 times in the page |
| 36 | fault handler. (or use vmalloc_sync_all at each tracing module load)<br> |
| 37 | (5) Add boot time tracing support.<br> |
| 38 | (5) Integrate LTTng and lttd with LKCD.<br> |
| 39 | # <A HREF="mailto:Lai Jiangshan <laijs@cn.fujitsu.com>>">Lai Jiangshan</A><br> |
| 40 | (7) Integrate periodical dump of perfctr hardware counters.<br> |
| 41 | (8) Integrate SystemTAP logging with LTTng.<br> |
| 42 | (8) Integrate periodical dump of SystemTAP computed information.<br> |
| 43 | (9) Add support for setjmp/longjmp and jump tables instrumentation to |
| 44 | ltt-instrument-functions.<br> |
| 45 | (3) port LTTng to :<br> |
| 46 | ARM OMAP3<BR> |
| 47 | % Nokia<BR> |
| 48 | <br> |
| 49 | <br> |
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50 | <big>LTTV Roadmap<small><br> |
| 51 | <br> |
| 52 | * TODO<br> |
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53 | (3) Add cluster support.<br> |
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54 | (4) Statistics per time window.<br> |
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55 | (4) Add Xen per physical CPU view.<br> |
| 56 | (4) Add Xen per vcpu view.<br> |
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57 | (4) Disable plugins when threshold reached (i.e. too much process in control |
| 58 | flow view). Draw, and, when the threshold is reached, stop drawing. The global |
| 59 | statistics view can inhibit showing the per process stats.<br> |
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60 | (4) Add a visual artifact : PID 0 could be named swapper instead of UNNAMED for |
| 61 | cpus > 0.<br> |
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62 | (4) Add event specific fields support to filter.<br> |
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63 | (4) Add a periodic event interval view. (useful to verify event periodicity)<br> |
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64 | (4) create a graphical per cpu activity view.<br> |
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65 | (4) Filter by target process.<br> |
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66 | (4) Compensate for time spent in probes in LTTV analysis.<br> |
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67 | (4) Add CPU, network, disk, memory usage histogram. [Per interval statistics]<br> |
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68 | (4) Add sort by process priority in the control flow view (must also instrument |
| 69 | priority information of the processes).<br> |
| 70 | % Airbus<br> |
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71 | (5) Add Python scripting hooks.<br> |
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72 | (5) Add GUI interface to take an hybrid trace.<br> |
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73 | (5) Automatically detect traces with too much processes and disable faulty operations.<br> |
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74 | (5) Event sequence detector (inspired from regular expressions).<br> |
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75 | (7) Create a hardware counter viewer (low cost rate counters : L1 cache miss, |
| 76 | page faults, interrupts...). This will be a generalisation of the event rate |
| 77 | view into a view of the evolution of a user definable event field.<br> |
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78 | <br> |
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79 | * TO FIX<br> |
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80 | (10) Add cancel button to LTTV filter GUI window.<br> |
| 81 | (10) Sometimes, in the control flow view, a process with 0 creation time is |
| 82 | created in addition to the real process itself. Seems to be caused by end of |
| 83 | process life.<br> |
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84 | (10) Statistics do not take in account the time spent in the mode present at |
| 85 | the beginning of the trace. Example : real time spent in system call on behalf |
| 86 | of process 0.<br> |
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87 | <br> |
| 88 | <br> |
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89 | <br> |
| 90 | * TODO (low priority)<br> |
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91 | enhance RPM packages for lttng kernel<br> |
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92 | Export buffers with time constraint for "live" visualisation. Use |
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93 | ltt_force_switch periodically from a timer to insure slow channels do not |
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94 | interfere with viewing.<br> |
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95 | Have an optional round-robin mode to write information into multiple channels |
| 96 | from the same source.<br> |
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97 | <br> |
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98 | * Need to be discussed<br> |
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99 | Drop ltt-module-register and ltt-module-unregister, use exported variables.<br> |
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100 | drop ltt_filter_control, use functions pointers instead.<br> |
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101 | Remove ltt-base.c.<br> |
| 102 | <br> |
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103 | Mathieu Desnoyers<br> |
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104 | |
| 105 | |
| 106 | </body> |
| 107 | </html> |
projects / lttv.git / blame