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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 | <big>LTTV Roadmap<small><br> |
| 13 | <br> |
| 14 | * TODO<br> |
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15 | (4) create a event rate graphical view : Will be useful in conjonction with the |
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16 | filter.<br> |
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17 | (6) migrate align to lttv parser.<br> |
| 18 | (7) create an analysis of function time (like a precise gprof)<br> |
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19 | -> with gcc -f inline-functions<br> |
| 20 | <br> |
| 21 | <br> |
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22 | * Done<br> |
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23 | Buffer aligned on page boundary -> use valloc.<br> |
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24 | per struct (struct align=x) support added to genevent (partial).<br> |
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25 | Add offset align generation for structs to genevent.<br> |
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26 | make lttv aware of the per facility long, void* and size_t types.<br> |
| 27 | Read current trace header and buffer header.<br> |
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28 | redo lib tracefile : too much problems in there.<br> |
| 29 | modify the rest of LTTV to match the API changes.<br> |
| 30 | debian package<br> |
| 31 | RPM package<br> |
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32 | <br> |
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33 | <big>LTT Next Generation Roadmap<small><br> |
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34 | <br> |
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35 | * TODO<br> |
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36 | (1) make LTT tracing code completely atomic (thus remove locks)<br> |
| 37 | (2) add efficient and secure user space tracing. (1 month)<br> |
| 38 | (3) integrate LTTng State Dump : missing irq and process state.<br> |
| 39 | (9) add genevent full functionnality : alignment, array, sequences, nested |
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40 | structures.<br> |
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41 | (7) add gcc -finstrument-functions instrumentation<br> |
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42 | <br> |
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43 | <br> |
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44 | * Done<br> |
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45 | remove ltt-headers.h<br> |
| 46 | remove ltt-log.h<br> |
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47 | Put trace->active later in _ltt_trace_start()<br> |
| 48 | ltt_trace_create() remove sleep in spinlock use GFP_ATOMIC kmalloc<br> |
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49 | Fix the locking of module hooks.<br> |
| 50 | Fix the traps -> disable nested logging for now.<br> |
| 51 | Use per cpu spinlock on trace list.<br> |
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52 | Finish the control module, libltt and lttctl : netlink interface<br> |
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53 | Finish integrating lttctl with lttd.<br> |
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54 | fix lttctl signal waiting : use a flag.<br> |
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55 | Add ltt_write_commit_counter call to genevent.<br> |
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56 | Add information in the buffer header : buffer size, etc etc...<br> |
| 57 | -> this information is so small that we can repeat it. Makes flight recorder |
| 58 | easier to decode.<br> |
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59 | Add trace start structure to buffer start header.<br> |
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60 | fix genevent : take no lock if num traces active is 0.<br> |
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61 | Add type information per facility : it will help having a standard way |
| 62 | to understand information coming from both kernel space and user space, and deal |
| 63 | easily with 64 bits kernel with 64 and 32 bits processes (and with size_t know |
| 64 | at compile time which can differ inside the same process from one library to |
| 65 | another).<br> |
| 66 | fix structures alignment, array and sequences too. -> trace dynamic.<br> |
| 67 | add per facility alignment (inside structures).<br> |
| 68 | add control of alignment.<br> |
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69 | add control for subbuffer size and number of subbuffers.<br> |
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70 | Add reserve - get TSC - alignment atomicity through the use of cmpxchg.<br> |
| 71 | Add configurable alignment (LTT_ALIGNMENT).<br> |
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72 | Get ultra-precise logging with use of TSC (only) : only one do_gettimeofday |
| 73 | read, and then we don't want the time flow to be altered by ntp.<br> |
| 74 | Debian kernel package<br> |
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75 | <br> |
| 76 | <br> |
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77 | <br> |
| 78 | * TODO (low priority)<br> |
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79 | enhance RPM packages for lttng kernel<br> |
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80 | Integrate header generation (genevent) in kernel build system.<br> |
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81 | Multithreaded lttd.<br> |
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82 | Find a different way to printk from instrumentation : forbidden from schedule |
| 83 | and wakeup (causes a deadlock).<br> |
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84 | <br> |
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85 | * Need to be discussed<br> |
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86 | Drop ltt-module-register and ltt-module-unregister, use exported variables.<br> |
| 87 | RelayFS ioctl interface vs control through LTT netlink interface.<br> |
| 88 | drop ltt_filter_control, use functions pointers instead.<br> |
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89 | Merge facilities headers into one big header.<br> |
| 90 | Change the name of XML files from XML to something else.<br> |
| 91 | Remove ltt-base.c.<br> |
| 92 | <br> |
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93 | * Not planned for integration<br> |
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94 | Remove the callback struct from the trace struct.<br> |
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95 | <br> |
| 96 | <br> |
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97 | <br> |
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98 | * lttng patch division (0.4.2+) :<br> |
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99 | <br> |
| 100 | ltt-instrumentation.diff<br> |
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101 | ltt-facilities-headers.diff<br> |
| 102 | ltt-facilities-loader.diff<br> |
| 103 | ltt-facilities.diff<br> |
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104 | ltt-relayfs.diff<br> |
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105 | ltt-core.diff<br> |
| 106 | <br> |
| 107 | <br> |
| 108 | Mathieu Desnoyers<br> |
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109 | |
| 110 | |
| 111 | </body> |
| 112 | </html> |
projects / lttv.git / blame