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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 | # <A HREF="mailto:Parisa Heidari <parisa.heidari@polymtl.ca>">Parisa Heidari</A><br> |
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18 | (6) migrate align to lttv parser.<br> |
19 | (7) create an analysis of function time (like a precise gprof)<br> |
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20 | -> with gcc -f inline-functions<br> |
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21 | (10) Add cancel button to LTTV filter GUI window. |
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22 | <br> |
23 | <br> |
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24 | * Done<br> |
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25 | per struct (struct align=x) support added to genevent (partial).<br> |
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26 | Add offset align generation for structs to genevent.<br> |
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27 | make lttv aware of the per facility long, void* and size_t types.<br> |
28 | Read current trace header and buffer header.<br> |
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29 | redo lib tracefile : too much problems in there.<br> |
30 | modify the rest of LTTV to match the API changes.<br> |
31 | debian package<br> |
32 | RPM package<br> |
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33 | <br> |
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34 | <big>LTT Next Generation Roadmap<small><br> |
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35 | <br> |
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36 | * TODO<br> |
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37 | (1) add genevent full functionnality : alignment, array, sequences, nested |
38 | structures.<br> |
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39 | # <A HREF="mailto:Mathieu Desnoyers <compudj@krystal.dyndns.org>>">Mathieu Desnoyers</A><br> |
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40 | (1) port LTTng to 2.6.14 kernel. (depends on genevent rewrite)<br> |
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41 | (2) add efficient and secure user space tracing. (1 month)<br> |
42 | (3) integrate LTTng State Dump : missing irq and process state.<br> |
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43 | # <A HREF="mailto:Jean-Hugues Deschenes <jean-hugues.deschenes@polymtl.ca>">Jean-Hugues Deschenes</A><br> |
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44 | (7) add gcc -finstrument-functions instrumentation<br> |
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45 | (3) port LTTng to x86_64, PPC, alpha, user-mode Linux, Xen, MIPS, ARM, S/390. |
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46 | (depends on 2.6.14 port) |
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47 | <br> |
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48 | <br> |
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49 | * Done<br> |
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50 | remove ltt-headers.h<br> |
51 | remove ltt-log.h<br> |
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52 | Put trace->active later in _ltt_trace_start()<br> |
53 | ltt_trace_create() remove sleep in spinlock use GFP_ATOMIC kmalloc<br> |
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54 | Fix the locking of module hooks.<br> |
55 | Fix the traps -> disable nested logging for now.<br> |
56 | Use per cpu spinlock on trace list.<br> |
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57 | Finish the control module, libltt and lttctl : netlink interface<br> |
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58 | Finish integrating lttctl with lttd.<br> |
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59 | fix lttctl signal waiting : use a flag.<br> |
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60 | Add ltt_write_commit_counter call to genevent.<br> |
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61 | Add information in the buffer header : buffer size, etc etc...<br> |
62 | -> this information is so small that we can repeat it. Makes flight recorder |
63 | easier to decode.<br> |
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64 | Add trace start structure to buffer start header.<br> |
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65 | fix genevent : take no lock if num traces active is 0.<br> |
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66 | Add type information per facility : it will help having a standard way |
67 | to understand information coming from both kernel space and user space, and deal |
68 | easily with 64 bits kernel with 64 and 32 bits processes (and with size_t know |
69 | at compile time which can differ inside the same process from one library to |
70 | another).<br> |
71 | fix structures alignment, array and sequences too. -> trace dynamic.<br> |
72 | add per facility alignment (inside structures).<br> |
73 | add control of alignment.<br> |
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74 | add control for subbuffer size and number of subbuffers.<br> |
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75 | Add reserve - get TSC - alignment atomicity through the use of cmpxchg.<br> |
76 | Add configurable alignment (LTT_ALIGNMENT).<br> |
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77 | Get ultra-precise logging with use of TSC (only) : only one do_gettimeofday |
78 | read, and then we don't want the time flow to be altered by ntp.<br> |
79 | Debian kernel package<br> |
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80 | make LTT tracing code completely atomic (thus remove locks)<br> |
81 | Buffer aligned on page boundary -> use valloc.<br> |
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82 | <br> |
83 | <br> |
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84 | <br> |
85 | * TODO (low priority)<br> |
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86 | enhance RPM packages for lttng kernel<br> |
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87 | Integrate header generation (genevent) in kernel build system.<br> |
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88 | Multithreaded lttd.<br> |
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89 | Find a different way to printk from instrumentation : forbidden from schedule |
90 | and wakeup (causes a deadlock).<br> |
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91 | <br> |
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92 | * Need to be discussed<br> |
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93 | Drop ltt-module-register and ltt-module-unregister, use exported variables.<br> |
94 | RelayFS ioctl interface vs control through LTT netlink interface.<br> |
95 | drop ltt_filter_control, use functions pointers instead.<br> |
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96 | Merge facilities headers into one big header.<br> |
97 | Change the name of XML files from XML to something else.<br> |
98 | Remove ltt-base.c.<br> |
99 | <br> |
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100 | * Not planned for integration<br> |
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101 | Remove the callback struct from the trace struct.<br> |
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102 | <br> |
103 | <br> |
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104 | <br> |
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105 | * lttng patch division (0.4.2+) :<br> |
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106 | <br> |
107 | ltt-instrumentation.diff<br> |
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108 | ltt-facilities-headers.diff<br> |
109 | ltt-facilities-loader.diff<br> |
110 | ltt-facilities.diff<br> |
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111 | ltt-relayfs.diff<br> |
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112 | ltt-core.diff<br> |
113 | <br> |
114 | <br> |
115 | Mathieu Desnoyers<br> |
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116 | |
117 | |
118 | </body> |
119 | </html> |