[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>
The % symbol marks who is interested in the realisation of 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 : (depends on 2.6.14 port)<br>
x86_64<BR>
#Autodesk <A HREF="mailto:Francois L'Archeveque <fla@discreet.com>">François
L'Archêveque</A> for 2.6.9 RedHat Enterprise<BR>
%Wind River for 2.6.10<BR>
PPC<BR>
PPC64<BR>
%Wind River for 2.6.10<BR>
alpha<BR>
user-mode Linux<BR>
Xen<BR>
MIPS<BR>
MIPS64<BR>
%Wind River for 2.6.10<BR>
ARM<BR>
S/390<BR>
<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>
59656e3f	13	The # symbol marks who is currently working on the item.<br>
e565223b	14	The % symbol marks who is interested in the realisation of the item.<br>
59656e3f	15	<br>
c8a111eb	16	<big>LTTV Roadmap<small><br>
	17	<br>
	18	* TODO<br>
90d65afc	19	(4) create a event rate graphical view : Will be useful in conjonction with the
c8a111eb	20	filter.<br>
4a2e16b7	21	# <A HREF="mailto:Parisa Heidari <parisa.heidari@polymtl.ca>">Parisa Heidari</A><br>
90d65afc	22	(6) migrate align to lttv parser.<br>
90d65afc	23	(7) create an analysis of function time (like a precise gprof)<br>
c8a111eb	24	-> with gcc -f inline-functions<br>
16383052	25	(10) Add cancel button to LTTV filter GUI window.
c8a111eb	26	<br>
c8a111eb	27	<br>
0c4b3d55	28	* Done<br>
d6533ec7	29	per struct (struct align=x) support added to genevent (partial).<br>
b8b5f119	30	Add offset align generation for structs to genevent.<br>
81d2643e	31	make lttv aware of the per facility long, void* and size_t types.<br>
81d2643e	32	Read current trace header and buffer header.<br>
6da6b02c	33	redo lib tracefile : too much problems in there.<br>
	34	modify the rest of LTTV to match the API changes.<br>
	35	debian package<br>
	36	RPM package<br>
0c4b3d55	37	<br>
c8a111eb	38	<big>LTT Next Generation Roadmap<small><br>
0c4b3d55	39	<br>
c8a111eb	40	* TODO<br>
145c9c57	41	(1) add genevent full functionnality : alignment, array, sequences, nested
145c9c57	42	structures.<br>
3bb20f01	43	# <A HREF="mailto:Mathieu Desnoyers <compudj@krystal.dyndns.org>>">Mathieu Desnoyers</A><br>
145c9c57	44	(1) port LTTng to 2.6.14 kernel. (depends on genevent rewrite)<br>
90d65afc	45	(2) add efficient and secure user space tracing. (1 month)<br>
90d65afc	46	(3) integrate LTTng State Dump : missing irq and process state.<br>
4a2e16b7	47	# <A HREF="mailto:Jean-Hugues Deschenes <jean-hugues.deschenes@polymtl.ca>">Jean-Hugues Deschenes</A><br>
90d65afc	48	(7) add gcc -finstrument-functions instrumentation<br>
e565223b	49	(3) port LTTng to : (depends on 2.6.14 port)<br>
	50	x86_64<BR>
	51	#Autodesk <A HREF="mailto:Francois L'Archeveque <fla@discreet.com>">François
	52	L'Archêveque</A> for 2.6.9 RedHat Enterprise<BR>
	53	%Wind River for 2.6.10<BR>
	54	PPC<BR>
	55	PPC64<BR>
	56	%Wind River for 2.6.10<BR>
	57	alpha<BR>
	58	user-mode Linux<BR>
	59	Xen<BR>
	60	MIPS<BR>
	61	MIPS64<BR>
	62	%Wind River for 2.6.10<BR>
	63	ARM<BR>
	64	S/390<BR>
0c4b3d55	65	<br>
15e89ad6	66	<br>
b720b182	67	* Done<br>
b720b182	68	remove ltt-headers.h<br>
b720b182	69	remove ltt-log.h<br>
c9eaf4ed	70	Put trace->active later in _ltt_trace_start()<br>
c9eaf4ed	71	ltt_trace_create() remove sleep in spinlock use GFP_ATOMIC kmalloc<br>
1502fa62	72	Fix the locking of module hooks.<br>
	73	Fix the traps -> disable nested logging for now.<br>
	74	Use per cpu spinlock on trace list.<br>
24c78300	75	Finish the control module, libltt and lttctl : netlink interface<br>
baffa645	76	Finish integrating lttctl with lttd.<br>
ada84671	77	fix lttctl signal waiting : use a flag.<br>
4e4d11b3	78	Add ltt_write_commit_counter call to genevent.<br>
24c78300	79	Add information in the buffer header : buffer size, etc etc...<br>
	80	-> this information is so small that we can repeat it. Makes flight recorder
	81	easier to decode.<br>
4e4d11b3	82	Add trace start structure to buffer start header.<br>
ada84671	83	fix genevent : take no lock if num traces active is 0.<br>
4e4d11b3	84	Add type information per facility : it will help having a standard way
	85	to understand information coming from both kernel space and user space, and deal
	86	easily with 64 bits kernel with 64 and 32 bits processes (and with size_t know
	87	at compile time which can differ inside the same process from one library to
	88	another).<br>
	89	fix structures alignment, array and sequences too. -> trace dynamic.<br>
	90	add per facility alignment (inside structures).<br>
	91	add control of alignment.<br>
0c4b3d55	92	add control for subbuffer size and number of subbuffers.<br>
b6dfdc9c	93	Add reserve - get TSC - alignment atomicity through the use of cmpxchg.<br>
b6dfdc9c	94	Add configurable alignment (LTT_ALIGNMENT).<br>
6da6b02c	95	Get ultra-precise logging with use of TSC (only) : only one do_gettimeofday
	96	read, and then we don't want the time flow to be altered by ntp.<br>
	97	Debian kernel package<br>
145c9c57	98	make LTT tracing code completely atomic (thus remove locks)<br>
145c9c57	99	Buffer aligned on page boundary -> use valloc.<br>
0c4b3d55	100	<br>
0c4b3d55	101	<br>
b720b182	102	<br>
b720b182	103	* TODO (low priority)<br>
cbe85414	104	enhance RPM packages for lttng kernel<br>
b720b182	105	Integrate header generation (genevent) in kernel build system.<br>
c9eaf4ed	106	Multithreaded lttd.<br>
baffa645	107	Find a different way to printk from instrumentation : forbidden from schedule
baffa645	108	and wakeup (causes a deadlock).<br>
b720b182	109	<br>
15e89ad6	110	* Need to be discussed<br>
b720b182	111	Drop ltt-module-register and ltt-module-unregister, use exported variables.<br>
	112	RelayFS ioctl interface vs control through LTT netlink interface.<br>
	113	drop ltt_filter_control, use functions pointers instead.<br>
b720b182	114	Merge facilities headers into one big header.<br>
	115	Change the name of XML files from XML to something else.<br>
	116	Remove ltt-base.c.<br>
	117	<br>
15e89ad6	118	* Not planned for integration<br>
4f782cda	119	Remove the callback struct from the trace struct.<br>
15e89ad6	120	<br>
15e89ad6	121	<br>
b720b182	122	<br>
81d2643e	123	* lttng patch division (0.4.2+) :<br>
b720b182	124	<br>
b720b182	125	ltt-instrumentation.diff<br>
b720b182	126	ltt-facilities-headers.diff<br>
	127	ltt-facilities-loader.diff<br>
	128	ltt-facilities.diff<br>
b720b182	129	ltt-relayfs.diff<br>
b720b182	130	ltt-core.diff<br>
	131	<br>
	132	<br>
	133	Mathieu Desnoyers<br>
1f2c88b1	134
	135
	136	</body>
	137	</html>