get the size and update event fields at the end of the read
[lttv.git] / ltt / branches / poly / doc / developer / ltt-experimental-rewrite.html
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1f2c88b1 1<html>
2<body>
0c4b3d55 3Progress in LTTV :<br>
4* Done<br>
3490c00c 5Buffer aligned on page boundary -> use valloc.<br>
d6533ec7 6per struct (struct align=x) support added to genevent (partial).<br>
b8b5f119 7Add offset align generation for structs to genevent.<br>
0c4b3d55 8<br>
9*TODO<br>
10Read current trace header and buffer header.<br>
11migrate align to lttv parser.<br>
f5292cf8 12make lttv aware of the per facility long, void* and size_t types.<br>
0c4b3d55 13<br>
14<br>
15e89ad6 15Here the status of the work in progress for LTT experimental<br>
16<br>
b720b182 17* Done<br>
b720b182 18remove ltt-headers.h<br>
19remove ltt-log.h<br>
c9eaf4ed 20Put trace->active later in _ltt_trace_start()<br>
21ltt_trace_create() remove sleep in spinlock use GFP_ATOMIC kmalloc<br>
1502fa62 22Fix the locking of module hooks.<br>
23Fix the traps -> disable nested logging for now.<br>
24Use per cpu spinlock on trace list.<br>
24c78300 25Finish the control module, libltt and lttctl : netlink interface<br>
baffa645 26Finish integrating lttctl with lttd.<br>
ada84671 27fix lttctl signal waiting : use a flag.<br>
4e4d11b3 28Add ltt_write_commit_counter call to genevent.<br>
24c78300 29Add information in the buffer header : buffer size, etc etc...<br>
30 -> this information is so small that we can repeat it. Makes flight recorder
31 easier to decode.<br>
4e4d11b3 32Add trace start structure to buffer start header.<br>
ada84671 33fix genevent : take no lock if num traces active is 0.<br>
4e4d11b3 34Add type information per facility : it will help having a standard way
35to understand information coming from both kernel space and user space, and deal
36easily with 64 bits kernel with 64 and 32 bits processes (and with size_t know
37at compile time which can differ inside the same process from one library to
38another).<br>
39fix structures alignment, array and sequences too. -> trace dynamic.<br>
40add per facility alignment (inside structures).<br>
41add control of alignment.<br>
0c4b3d55 42add control for subbuffer size and number of subbuffers.<br>
43<br>
44<br>
45* TODO<br>
4e4d11b3 46add user space tracing.<br>
47<br>
48<br>
b720b182 49<br>
50* TODO (low priority)<br>
b720b182 51Integrate header generation (genevent) in kernel build system.<br>
c9eaf4ed 52Multithreaded lttd.<br>
baffa645 53Find a different way to printk from instrumentation : forbidden from schedule
54and wakeup (causes a deadlock).<br>
b720b182 55<br>
15e89ad6 56* Need to be discussed<br>
b720b182 57Drop ltt-module-register and ltt-module-unregister, use exported variables.<br>
58RelayFS ioctl interface vs control through LTT netlink interface.<br>
59drop ltt_filter_control, use functions pointers instead.<br>
b720b182 60Merge facilities headers into one big header.<br>
61Change the name of XML files from XML to something else.<br>
62Remove ltt-base.c.<br>
63<br>
15e89ad6 64* Not planned for integration<br>
4f782cda 65Remove the callback struct from the trace struct.<br>
15e89ad6 66<br>
67<br>
b720b182 68<br>
69* Next experimental release patch division :<br>
70<br>
71ltt-instrumentation.diff<br>
72 - ltt-configmenu.diff (put in ltt-core.diff)<br>
73ltt-facilities-headers.diff<br>
74ltt-facilities-loader.diff<br>
75ltt-facilities.diff<br>
76ltt-instrumentation.diff<br>
77ltt-relayfs.diff<br>
78ltt-time.diff<br>
79ltt-core.diff<br>
80<br>
81<br>
82Mathieu Desnoyers<br>
1f2c88b1 83
84
85</body>
86</html>
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