[lttv.git] / ltt / branches / poly / doc / developer / lttng-lttv-roadmap.html

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<center><big><big>LTTV & LTTng roadmap<small><small></center>
<br>
<br>
Here are the roadmaps for the LTTV and LTTng development. I use a priority indice
for the TODO items :<br>
(1) : very high priority<br>
(10): lowest priority<br>
<br>
<br>
<big>LTTV Roadmap<small><br>
<br>
* TODO<br>
(4) create a event rate graphical view : Will be useful in conjonction with the
  filter.<br>
	# <A HREF="mailto:Parisa Heidari <parisa.heidari@polymtl.ca>">Parisa Heidari</A><br>
(6) migrate align to lttv parser.<br>
(7) create an analysis of function time (like a precise gprof)<br>
  -> with gcc -f inline-functions<br>
(10) Add cancel button to LTTV filter GUI window.
<br>
<br>
* Done<br>
per struct (struct align=x) support added to genevent (partial).<br>
Add offset align generation for structs to genevent.<br>
make lttv aware of the per facility long, void* and size_t types.<br>
Read current trace header and buffer header.<br>
redo lib tracefile : too much problems in there.<br>
modify the rest of LTTV to match the API changes.<br>
debian package<br>
RPM package<br>
<br>
<big>LTT Next Generation Roadmap<small><br>
<br>
* TODO<br>
(1) add genevent full functionnality : alignment, array, sequences, nested
structures.<br>
	# <A HREF="mailto:Mathieu Desnoyers <compudj@krystal.dyndns.org>>">Mathieu Desnoyers</A><br>
(1) port LTTng to 2.6.14 kernel. (depends on genevent rewrite)<br>
(2) add efficient and secure user space tracing. (1 month)<br>
(3) integrate LTTng State Dump : missing irq and process state.<br>
	# <A HREF="mailto:Jean-Hugues Deschenes <jean-hugues.deschenes@polymtl.ca>">Jean-Hugues Deschenes</A><br>
(7) add gcc -finstrument-functions instrumentation<br>
(3) port LTTng to x86_64, PPC, alpha, user-mode Linux, Xen, MIPS, ARM, S/390.
(depends on 2.6.14 port)
<br>
<br>
* Done<br>
remove ltt-headers.h<br>
remove ltt-log.h<br>
Put trace->active later in _ltt_trace_start()<br>
ltt_trace_create() remove sleep in spinlock use GFP_ATOMIC kmalloc<br>
Fix the locking of module hooks.<br>
Fix the traps -> disable nested logging for now.<br>
Use per cpu spinlock on trace list.<br>
Finish the control module, libltt and lttctl : netlink interface<br>
Finish integrating lttctl with lttd.<br>
fix lttctl signal waiting : use a flag.<br>
Add ltt_write_commit_counter call to genevent.<br>
Add information in the buffer header : buffer size, etc etc...<br>
	-> this information is so small that we can repeat it. Makes flight recorder
	easier to decode.<br>
Add trace start structure to buffer start header.<br>
fix genevent : take no lock if num traces active is 0.<br>
Add type information per facility : it will help having a standard way
to understand information coming from both kernel space and user space, and deal
easily with 64 bits kernel with 64 and 32 bits processes (and with size_t know
at compile time which can differ inside the same process from one library to
another).<br>
fix structures alignment, array and sequences too. -> trace dynamic.<br>
add per facility alignment (inside structures).<br>
add control of alignment.<br>
add control for subbuffer size and number of subbuffers.<br>
Add reserve - get TSC - alignment atomicity through the use of cmpxchg.<br>
Add configurable alignment (LTT_ALIGNMENT).<br>
Get ultra-precise logging with use of TSC (only) : only one do_gettimeofday
read, and then we don't want the time flow to be altered by ntp.<br>
Debian kernel package<br>
make LTT tracing code completely atomic (thus remove locks)<br>
Buffer aligned on page boundary -> use valloc.<br>
<br>
<br>
<br>
* TODO (low priority)<br>
enhance RPM packages for lttng kernel<br>
Integrate header generation (genevent) in kernel build system.<br>
Multithreaded lttd.<br>
Find a different way to printk from instrumentation : forbidden from schedule
and wakeup (causes a deadlock).<br>
<br>
* Need to be discussed<br>
Drop ltt-module-register and ltt-module-unregister, use exported variables.<br>
RelayFS ioctl interface vs control through LTT netlink interface.<br>
drop ltt_filter_control, use functions pointers instead.<br>
Merge facilities headers into one big header.<br>
Change the name of XML files from XML to something else.<br>
Remove ltt-base.c.<br>
<br>
* Not planned for integration<br>
Remove the callback struct from the trace struct.<br>
<br>
<br>
<br>
* lttng patch division (0.4.2+) :<br>
<br>
ltt-instrumentation.diff<br>
ltt-facilities-headers.diff<br>
ltt-facilities-loader.diff<br>
ltt-facilities.diff<br>
ltt-relayfs.diff<br>
ltt-core.diff<br>
<br>
<br>
Mathieu Desnoyers<br>


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Commit	Line	Data
1f2c88b1	1	<html>
1f2c88b1	2	<body>
e3a30a9e	3	<center><big><big>LTTV & LTTng roadmap<small><small></center>
674fa3b3	4	<br>
674fa3b3	5	<br>
5e11a375	6	Here are the roadmaps for the LTTV and LTTng development. I use a priority indice
fc5993d2	7	for the TODO items :<br>
90d65afc	8	(1) : very high priority<br>
90d65afc	9	(10): lowest priority<br>
fc5993d2	10	<br>
fc5993d2	11	<br>
c8a111eb	12	<big>LTTV Roadmap<small><br>
	13	<br>
	14	* TODO<br>
90d65afc	15	(4) create a event rate graphical view : Will be useful in conjonction with the
c8a111eb	16	filter.<br>
4a2e16b7	17	# <A HREF="mailto:Parisa Heidari <parisa.heidari@polymtl.ca>">Parisa Heidari</A><br>
90d65afc	18	(6) migrate align to lttv parser.<br>
90d65afc	19	(7) create an analysis of function time (like a precise gprof)<br>
c8a111eb	20	-> with gcc -f inline-functions<br>
16383052	21	(10) Add cancel button to LTTV filter GUI window.
c8a111eb	22	<br>
c8a111eb	23	<br>
0c4b3d55	24	* Done<br>
d6533ec7	25	per struct (struct align=x) support added to genevent (partial).<br>
b8b5f119	26	Add offset align generation for structs to genevent.<br>
81d2643e	27	make lttv aware of the per facility long, void* and size_t types.<br>
81d2643e	28	Read current trace header and buffer header.<br>
6da6b02c	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>
0c4b3d55	33	<br>
c8a111eb	34	<big>LTT Next Generation Roadmap<small><br>
0c4b3d55	35	<br>
c8a111eb	36	* TODO<br>
145c9c57	37	(1) add genevent full functionnality : alignment, array, sequences, nested
145c9c57	38	structures.<br>
3bb20f01	39	# <A HREF="mailto:Mathieu Desnoyers <compudj@krystal.dyndns.org>>">Mathieu Desnoyers</A><br>
145c9c57	40	(1) port LTTng to 2.6.14 kernel. (depends on genevent rewrite)<br>
90d65afc	41	(2) add efficient and secure user space tracing. (1 month)<br>
90d65afc	42	(3) integrate LTTng State Dump : missing irq and process state.<br>
4a2e16b7	43	# <A HREF="mailto:Jean-Hugues Deschenes <jean-hugues.deschenes@polymtl.ca>">Jean-Hugues Deschenes</A><br>
90d65afc	44	(7) add gcc -finstrument-functions instrumentation<br>
821acb2b	45	(3) port LTTng to x86_64, PPC, alpha, user-mode Linux, Xen, MIPS, ARM, S/390.
145c9c57	46	(depends on 2.6.14 port)
0c4b3d55	47	<br>
15e89ad6	48	<br>
b720b182	49	* Done<br>
b720b182	50	remove ltt-headers.h<br>
b720b182	51	remove ltt-log.h<br>
c9eaf4ed	52	Put trace->active later in _ltt_trace_start()<br>
c9eaf4ed	53	ltt_trace_create() remove sleep in spinlock use GFP_ATOMIC kmalloc<br>
1502fa62	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>
24c78300	57	Finish the control module, libltt and lttctl : netlink interface<br>
baffa645	58	Finish integrating lttctl with lttd.<br>
ada84671	59	fix lttctl signal waiting : use a flag.<br>
4e4d11b3	60	Add ltt_write_commit_counter call to genevent.<br>
24c78300	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>
4e4d11b3	64	Add trace start structure to buffer start header.<br>
ada84671	65	fix genevent : take no lock if num traces active is 0.<br>
4e4d11b3	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>
0c4b3d55	74	add control for subbuffer size and number of subbuffers.<br>
b6dfdc9c	75	Add reserve - get TSC - alignment atomicity through the use of cmpxchg.<br>
b6dfdc9c	76	Add configurable alignment (LTT_ALIGNMENT).<br>
6da6b02c	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>
145c9c57	80	make LTT tracing code completely atomic (thus remove locks)<br>
145c9c57	81	Buffer aligned on page boundary -> use valloc.<br>
0c4b3d55	82	<br>
0c4b3d55	83	<br>
b720b182	84	<br>
b720b182	85	* TODO (low priority)<br>
cbe85414	86	enhance RPM packages for lttng kernel<br>
b720b182	87	Integrate header generation (genevent) in kernel build system.<br>
c9eaf4ed	88	Multithreaded lttd.<br>
baffa645	89	Find a different way to printk from instrumentation : forbidden from schedule
baffa645	90	and wakeup (causes a deadlock).<br>
b720b182	91	<br>
15e89ad6	92	* Need to be discussed<br>
b720b182	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>
b720b182	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>
15e89ad6	100	* Not planned for integration<br>
4f782cda	101	Remove the callback struct from the trace struct.<br>
15e89ad6	102	<br>
15e89ad6	103	<br>
b720b182	104	<br>
81d2643e	105	* lttng patch division (0.4.2+) :<br>
b720b182	106	<br>
b720b182	107	ltt-instrumentation.diff<br>
b720b182	108	ltt-facilities-headers.diff<br>
	109	ltt-facilities-loader.diff<br>
	110	ltt-facilities.diff<br>
b720b182	111	ltt-relayfs.diff<br>
b720b182	112	ltt-core.diff<br>
	113	<br>
	114	<br>
	115	Mathieu Desnoyers<br>
1f2c88b1	116
	117
	118	</body>
	119	</html>