[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>
Dependencies are written between parenthesis ( ).<br>
The # symbol marks who is currently working on the item.<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>
59656e3f	12	Dependencies are written between parenthesis ( ).<br>
	13	The # symbol marks who is currently working on the item.<br>
	14	<br>
c8a111eb	15	<big>LTTV Roadmap<small><br>
	16	<br>
	17	* TODO<br>
90d65afc	18	(4) create a event rate graphical view : Will be useful in conjonction with the
c8a111eb	19	filter.<br>
4a2e16b7	20	# <A HREF="mailto:Parisa Heidari <parisa.heidari@polymtl.ca>">Parisa Heidari</A><br>
90d65afc	21	(6) migrate align to lttv parser.<br>
90d65afc	22	(7) create an analysis of function time (like a precise gprof)<br>
c8a111eb	23	-> with gcc -f inline-functions<br>
16383052	24	(10) Add cancel button to LTTV filter GUI window.
c8a111eb	25	<br>
c8a111eb	26	<br>
0c4b3d55	27	* Done<br>
d6533ec7	28	per struct (struct align=x) support added to genevent (partial).<br>
b8b5f119	29	Add offset align generation for structs to genevent.<br>
81d2643e	30	make lttv aware of the per facility long, void* and size_t types.<br>
81d2643e	31	Read current trace header and buffer header.<br>
6da6b02c	32	redo lib tracefile : too much problems in there.<br>
	33	modify the rest of LTTV to match the API changes.<br>
	34	debian package<br>
	35	RPM package<br>
0c4b3d55	36	<br>
c8a111eb	37	<big>LTT Next Generation Roadmap<small><br>
0c4b3d55	38	<br>
c8a111eb	39	* TODO<br>
145c9c57	40	(1) add genevent full functionnality : alignment, array, sequences, nested
145c9c57	41	structures.<br>
3bb20f01	42	# <A HREF="mailto:Mathieu Desnoyers <compudj@krystal.dyndns.org>>">Mathieu Desnoyers</A><br>
145c9c57	43	(1) port LTTng to 2.6.14 kernel. (depends on genevent rewrite)<br>
90d65afc	44	(2) add efficient and secure user space tracing. (1 month)<br>
90d65afc	45	(3) integrate LTTng State Dump : missing irq and process state.<br>
4a2e16b7	46	# <A HREF="mailto:Jean-Hugues Deschenes <jean-hugues.deschenes@polymtl.ca>">Jean-Hugues Deschenes</A><br>
90d65afc	47	(7) add gcc -finstrument-functions instrumentation<br>
821acb2b	48	(3) port LTTng to x86_64, PPC, alpha, user-mode Linux, Xen, MIPS, ARM, S/390.
145c9c57	49	(depends on 2.6.14 port)
0c4b3d55	50	<br>
15e89ad6	51	<br>
b720b182	52	* Done<br>
b720b182	53	remove ltt-headers.h<br>
b720b182	54	remove ltt-log.h<br>
c9eaf4ed	55	Put trace->active later in _ltt_trace_start()<br>
c9eaf4ed	56	ltt_trace_create() remove sleep in spinlock use GFP_ATOMIC kmalloc<br>
1502fa62	57	Fix the locking of module hooks.<br>
	58	Fix the traps -> disable nested logging for now.<br>
	59	Use per cpu spinlock on trace list.<br>
24c78300	60	Finish the control module, libltt and lttctl : netlink interface<br>
baffa645	61	Finish integrating lttctl with lttd.<br>
ada84671	62	fix lttctl signal waiting : use a flag.<br>
4e4d11b3	63	Add ltt_write_commit_counter call to genevent.<br>
24c78300	64	Add information in the buffer header : buffer size, etc etc...<br>
	65	-> this information is so small that we can repeat it. Makes flight recorder
	66	easier to decode.<br>
4e4d11b3	67	Add trace start structure to buffer start header.<br>
ada84671	68	fix genevent : take no lock if num traces active is 0.<br>
4e4d11b3	69	Add type information per facility : it will help having a standard way
	70	to understand information coming from both kernel space and user space, and deal
	71	easily with 64 bits kernel with 64 and 32 bits processes (and with size_t know
	72	at compile time which can differ inside the same process from one library to
	73	another).<br>
	74	fix structures alignment, array and sequences too. -> trace dynamic.<br>
	75	add per facility alignment (inside structures).<br>
	76	add control of alignment.<br>
0c4b3d55	77	add control for subbuffer size and number of subbuffers.<br>
b6dfdc9c	78	Add reserve - get TSC - alignment atomicity through the use of cmpxchg.<br>
b6dfdc9c	79	Add configurable alignment (LTT_ALIGNMENT).<br>
6da6b02c	80	Get ultra-precise logging with use of TSC (only) : only one do_gettimeofday
	81	read, and then we don't want the time flow to be altered by ntp.<br>
	82	Debian kernel package<br>
145c9c57	83	make LTT tracing code completely atomic (thus remove locks)<br>
145c9c57	84	Buffer aligned on page boundary -> use valloc.<br>
0c4b3d55	85	<br>
0c4b3d55	86	<br>
b720b182	87	<br>
b720b182	88	* TODO (low priority)<br>
cbe85414	89	enhance RPM packages for lttng kernel<br>
b720b182	90	Integrate header generation (genevent) in kernel build system.<br>
c9eaf4ed	91	Multithreaded lttd.<br>
baffa645	92	Find a different way to printk from instrumentation : forbidden from schedule
baffa645	93	and wakeup (causes a deadlock).<br>
b720b182	94	<br>
15e89ad6	95	* Need to be discussed<br>
b720b182	96	Drop ltt-module-register and ltt-module-unregister, use exported variables.<br>
	97	RelayFS ioctl interface vs control through LTT netlink interface.<br>
	98	drop ltt_filter_control, use functions pointers instead.<br>
b720b182	99	Merge facilities headers into one big header.<br>
	100	Change the name of XML files from XML to something else.<br>
	101	Remove ltt-base.c.<br>
	102	<br>
15e89ad6	103	* Not planned for integration<br>
4f782cda	104	Remove the callback struct from the trace struct.<br>
15e89ad6	105	<br>
15e89ad6	106	<br>
b720b182	107	<br>
81d2643e	108	* lttng patch division (0.4.2+) :<br>
b720b182	109	<br>
b720b182	110	ltt-instrumentation.diff<br>
b720b182	111	ltt-facilities-headers.diff<br>
	112	ltt-facilities-loader.diff<br>
	113	ltt-facilities.diff<br>
b720b182	114	ltt-relayfs.diff<br>
b720b182	115	ltt-core.diff<br>
	116	<br>
	117	<br>
	118	Mathieu Desnoyers<br>
1f2c88b1	119
	120
	121	</body>
	122	</html>