| | 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 | <big>LTTV Roadmap<small><br> |
| | 13 | <br> |
| | 14 | * TODO<br> |
| | 15 | (4) create a event rate graphical view : Will be useful in conjonction with the |
| | 16 | filter.<br> |
| | 17 | (6) migrate align to lttv parser.<br> |
| | 18 | (7) create an analysis of function time (like a precise gprof)<br> |
| | 19 | -> with gcc -f inline-functions<br> |
| | 20 | (10) Add cancel button to LTTV filter GUI window. |
| | 21 | <br> |
| | 22 | <br> |
| | 23 | * Done<br> |
| | 24 | Buffer aligned on page boundary -> use valloc.<br> |
| | 25 | per struct (struct align=x) support added to genevent (partial).<br> |
| | 26 | Add offset align generation for structs to genevent.<br> |
| | 27 | make lttv aware of the per facility long, void* and size_t types.<br> |
| | 28 | Read current trace header and buffer header.<br> |
| | 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> |
| | 33 | <br> |
| | 34 | <big>LTT Next Generation Roadmap<small><br> |
| | 35 | <br> |
| | 36 | * TODO<br> |
| | 37 | (1) make LTT tracing code completely atomic (thus remove locks)<br> |
| | 38 | (1) port LTTng to 2.6.14 kernel.<br> |
| | 39 | (2) add efficient and secure user space tracing. (1 month)<br> |
| | 40 | (3) integrate LTTng State Dump : missing irq and process state.<br> |
| | 41 | (9) add genevent full functionnality : alignment, array, sequences, nested |
| | 42 | structures.<br> |
| | 43 | (7) add gcc -finstrument-functions instrumentation<br> |
| | 44 | <br> |
| | 45 | <br> |
| | 46 | * Done<br> |
| | 47 | remove ltt-headers.h<br> |
| | 48 | remove ltt-log.h<br> |
| | 49 | Put trace->active later in _ltt_trace_start()<br> |
| | 50 | ltt_trace_create() remove sleep in spinlock use GFP_ATOMIC kmalloc<br> |
| | 51 | Fix the locking of module hooks.<br> |
| | 52 | Fix the traps -> disable nested logging for now.<br> |
| | 53 | Use per cpu spinlock on trace list.<br> |
| | 54 | Finish the control module, libltt and lttctl : netlink interface<br> |
| | 55 | Finish integrating lttctl with lttd.<br> |
| | 56 | fix lttctl signal waiting : use a flag.<br> |
| | 57 | Add ltt_write_commit_counter call to genevent.<br> |
| | 58 | Add information in the buffer header : buffer size, etc etc...<br> |
| | 59 | -> this information is so small that we can repeat it. Makes flight recorder |
| | 60 | easier to decode.<br> |
| | 61 | Add trace start structure to buffer start header.<br> |
| | 62 | fix genevent : take no lock if num traces active is 0.<br> |
| | 63 | Add type information per facility : it will help having a standard way |
| | 64 | to understand information coming from both kernel space and user space, and deal |
| | 65 | easily with 64 bits kernel with 64 and 32 bits processes (and with size_t know |
| | 66 | at compile time which can differ inside the same process from one library to |
| | 67 | another).<br> |
| | 68 | fix structures alignment, array and sequences too. -> trace dynamic.<br> |
| | 69 | add per facility alignment (inside structures).<br> |
| | 70 | add control of alignment.<br> |
| | 71 | add control for subbuffer size and number of subbuffers.<br> |
| | 72 | Add reserve - get TSC - alignment atomicity through the use of cmpxchg.<br> |
| | 73 | Add configurable alignment (LTT_ALIGNMENT).<br> |
| | 74 | Get ultra-precise logging with use of TSC (only) : only one do_gettimeofday |
| | 75 | read, and then we don't want the time flow to be altered by ntp.<br> |
| | 76 | Debian kernel package<br> |
| | 77 | <br> |
| | 78 | <br> |
| | 79 | <br> |
| | 80 | * TODO (low priority)<br> |
| | 81 | enhance RPM packages for lttng kernel<br> |
| | 82 | Integrate header generation (genevent) in kernel build system.<br> |
| | 83 | Multithreaded lttd.<br> |
| | 84 | Find a different way to printk from instrumentation : forbidden from schedule |
| | 85 | and wakeup (causes a deadlock).<br> |
| | 86 | <br> |
| | 87 | * Need to be discussed<br> |
| | 88 | Drop ltt-module-register and ltt-module-unregister, use exported variables.<br> |
| | 89 | RelayFS ioctl interface vs control through LTT netlink interface.<br> |
| | 90 | drop ltt_filter_control, use functions pointers instead.<br> |
| | 91 | Merge facilities headers into one big header.<br> |
| | 92 | Change the name of XML files from XML to something else.<br> |
| | 93 | Remove ltt-base.c.<br> |
| | 94 | <br> |
| | 95 | * Not planned for integration<br> |
| | 96 | Remove the callback struct from the trace struct.<br> |
| | 97 | <br> |
| | 98 | <br> |
| | 99 | <br> |
| | 100 | * lttng patch division (0.4.2+) :<br> |
| | 101 | <br> |
| | 102 | ltt-instrumentation.diff<br> |
| | 103 | ltt-facilities-headers.diff<br> |
| | 104 | ltt-facilities-loader.diff<br> |
| | 105 | ltt-facilities.diff<br> |
| | 106 | ltt-relayfs.diff<br> |
| | 107 | ltt-core.diff<br> |
| | 108 | <br> |
| | 109 | <br> |
| | 110 | Mathieu Desnoyers<br> |
| | 111 | |
| | 112 | |
| | 113 | </body> |
| | 114 | </html> |
projects / lttv.git / blame_incremental