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