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