[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 brackets [ ].<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>
(2) Finish pre-computing of states to a file.<br>
(3) Add cluster support.<br>
	# <A HREF="mailto:Eric Clement <eric.clement@polymtl.ca>">Eric Clement</A><br>
(3) Make LTTV aware of type formats (visual separators) defined in the XML
file.<br>
(3) Use a per architecture enumeration for traps.<br>
(3) Change the byte pair "facility, event" id for a short combining the
informatinon.<br>
(4) Statistics per time window.<br>
(4) Disable plugins when threshold reached (i.e. too much process in control
flow view). Draw, and, when the threshold is reached, stop drawing. The global
statistics view can inhibit showing the per process stats.<br>
(4) Add a visual artifact : PID 0 could be named swapper instead of UNNAMED for
cpus > 0.<br>
(4) Add event specific fields support to filter.<br>
(4) Add a periodic event interval view. (useful to verify event periodicity)<br>
(4) create a graphical per cpu activity view.<br>
(4) Filter by target process.<br>
(4) Compensate for time spent in probes in LTTV analysis.<br>
(4) Add CPU, network, disk, memory usage histogram. [Per interval statistics]<br>
(5) Add Python scripting hooks.<br>
(5) Flight recorder : start lttd automatically upon GUI trace control stop.<br>
(5) Automatically detect traces with too much processes and disable faulty operations.<br>
(5) Event sequence detector (inspired from regular expressions).<br>
(7) Create a hardware counter viewer (low cost rate counters : L1 cache miss,
page faults, interrupts...). This will be a generalisation of the event rate
view into a view of the evolution of a user definable event field.<br>
<br>
* TO FIX<br>
(4) Fix scroll backward in detailed event list (introduced with "stop"
functionnality.<br>
(10) Add cancel button to LTTV filter GUI window.<br>
(10) Sometimes, in the control flow view, a process with 0 creation time is
created in addition to the real process itself. Seems to be caused by end of
process life.<br>
(10) Statistics do not take in account the time spent in the mode present at
the beginning of the trace. Example : real time spent in system call on behalf
of process 0.<br>
<br>
<br>
<big>LTT Next Generation Roadmap<small><br>
<br>
* TODO<br>
(1) Announce LTTng patches on LKML.<br>
(3) Find a way to make logging know when it causes a minor page fault
recursively (without ignoring silently all nested events).<br>
(3) Have various subbuffer sizes for high and low rate channels.<br>
(3) Change the byte pair "facility, event" id for a short combining the
informatinon.<br>
(3) Add sysenter instrumentation on x86. Verify x86_64.<br>
(3) #IBM Fix ppc64 syscall time accounting. Maybe caused by a missing syscall
return instrumentation ?<br>
(3) Process and kernel stack dump for x86_64, for native and compat.<br>
(4) Add Xen support.<br>
	# <A HREF="mailto:Mathieu Desnoyers <compudj@krystal.dyndns.org>">Mathieu Desnoyers</A><br>
	# <A HREF="mailto:Parisa Heidari <parisa.heidari@polymtl.ca>">Parisa Heidari</A><br>
(4) efficient dynamic event filtering while recording trace.<br>
	% Sensis Corp. <A HREF="mailto:Bish, Tim <Tim.Bish@Sensis.com>">Tim Bish</A><br>
(4) instrument kernel bottom half irqsave, spinlocks, rwlocks, seqlocks, semaphores, mutexes, brlock.<br>
(4) In flight recorder mode, have the low traffic channels saved as normal
tracefiles and high traffic channels being flight recorder.<br>
(4) Try to use my own non LOCK prefixed version of atomic operations : we are
using per-CPU variables, so it should make it possible.<br>
(4) integrate NPTL instrumentation (see
<A HREF="http://nptltracetool.sourceforge.net/">PTT</A>).<br>
(4) Probe calibration kernel module.<br>
(5) Discuss with RelayFS upstream to integrate LTTng modifications.<br>
(5) Move to DebugFS for channel files.<br>
(5) Support CPUs with scalable frequency.<br>
(5) Integrate LTTng and lttd with LKCD.<br>
(7) Integrate periodical dump of perfctr hardware counters.<br>
(8) Integrate periodical dump of SystemTAP computed information.<br>
(8) Integrate SystemTAP logging with LTTng.<br>
(9) Add support for setjmp/longjmp and jump tables instrumentation to
ltt-instrument-functions.<br>
(9) Make ltt-usertrace-fast support internal heartbeat timer.<br>
(3) port LTTng to :<br>
x86_64<BR>
#Autodesk <A HREF="mailto:Francois L'Archeveque <fla@discreet.com>">Francois
L'Archeveque</A> for 2.6.9 RedHat Enterprise (patch available in contrib, still
has to be ported to 2.6.14, thanks!)<BR>
# Wind River for 2.6.14<BR>
PPC<BR>
PPC64<BR>
# Wind River for 2.6.14<BR>
alpha<BR>
user-mode Linux<BR>
Xen<BR>
# IBM<BR>
MIPS<BR>
MIPS64<BR>
% Wind River for 2.6.14<BR>
# Tim Bird <A HREF="mailto:tim.bird@as.sony.com">Tim Bird</A><br>
S/390<BR>
RTLinux<BR>
% Wind River for 2.6.14<BR>
<br>
<br>
<br>
* TODO (low priority)<br>
enhance RPM packages for lttng kernel<br>
Integrate header generation (genevent) in kernel build system.<br>
Export channels via network sockets instead of writing them to disk.<br>
Export buffers with time constraint for "live" visualisation. Use
ltt_force_switch periodically from a timer to insure slow channels do not
interfere with viewing.<br>
Have an optional round-robin mode to write information into multiple channels
from the same source.<br>
<br>
* Need to be discussed<br>
Use 2.6.14 RelayFS control files.<br>
Drop ltt-module-register and ltt-module-unregister, use exported variables.<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>
<br>
* lttng patch division (0.5.10+) :<br>
<br>
instrumentation.diff<br>
instrumentation-arm.diff<br>
instrumentation-i386.diff<br>
instrumentation-mips.diff<br>
instrumentation-powerpc.diff<br>
instrumentation-ppc.diff<br>
instrumentation-s390.diff<br>
instrumentation-sh.diff<br>
ltt-facilities-headers.diff<br>
ltt-facilities-loader.diff<br>
ltt-facilities.diff<br>
ltt-relayfs.diff<br>
ltt-core.diff<br>
ltt-build.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>
6b18b620	12	Dependencies are written between brackets [ ].<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>
9f95f0a6	19	(2) Finish pre-computing of states to a file.<br>
162990b3	20	(3) Add cluster support.<br>
162990b3	21	# <A HREF="mailto:Eric Clement <eric.clement@polymtl.ca>">Eric Clement</A><br>
ef19b009	22	(3) Make LTTV aware of type formats (visual separators) defined in the XML
ef19b009	23	file.<br>
15b0e8a4	24	(3) Use a per architecture enumeration for traps.<br>
568c21ab	25	(3) Change the byte pair "facility, event" id for a short combining the
568c21ab	26	informatinon.<br>
3ccb19e4	27	(4) Statistics per time window.<br>
	28	(4) Disable plugins when threshold reached (i.e. too much process in control
	29	flow view). Draw, and, when the threshold is reached, stop drawing. The global
	30	statistics view can inhibit showing the per process stats.<br>
568c21ab	31	(4) Add a visual artifact : PID 0 could be named swapper instead of UNNAMED for
568c21ab	32	cpus > 0.<br>
16fe6efa	33	(4) Add event specific fields support to filter.<br>
6ed34001	34	(4) Add a periodic event interval view. (useful to verify event periodicity)<br>
2d569f51	35	(4) create a graphical per cpu activity view.<br>
e6284587	36	(4) Filter by target process.<br>
cdee9265	37	(4) Compensate for time spent in probes in LTTV analysis.<br>
568c21ab	38	(4) Add CPU, network, disk, memory usage histogram. [Per interval statistics]<br>
b35779fc	39	(5) Add Python scripting hooks.<br>
b0a1cd56	40	(5) Flight recorder : start lttd automatically upon GUI trace control stop.<br>
caf22319	41	(5) Automatically detect traces with too much processes and disable faulty operations.<br>
b0a1cd56	42	(5) Event sequence detector (inspired from regular expressions).<br>
c5cab5d9	43	(7) Create a hardware counter viewer (low cost rate counters : L1 cache miss,
	44	page faults, interrupts...). This will be a generalisation of the event rate
	45	view into a view of the evolution of a user definable event field.<br>
b85b85e5	46	<br>
162990b3	47	* TO FIX<br>
8fc0ffcd	48	(4) Fix scroll backward in detailed event list (introduced with "stop"
8fc0ffcd	49	functionnality.<br>
b85b85e5	50	(10) Add cancel button to LTTV filter GUI window.<br>
	51	(10) Sometimes, in the control flow view, a process with 0 creation time is
	52	created in addition to the real process itself. Seems to be caused by end of
	53	process life.<br>
5355b763	54	(10) Statistics do not take in account the time spent in the mode present at
	55	the beginning of the trace. Example : real time spent in system call on behalf
	56	of process 0.<br>
c8a111eb	57	<br>
c8a111eb	58	<br>
c8a111eb	59	<big>LTT Next Generation Roadmap<small><br>
0c4b3d55	60	<br>
c8a111eb	61	* TODO<br>
cdee9265	62	(1) Announce LTTng patches on LKML.<br>
568c21ab	63	(3) Find a way to make logging know when it causes a minor page fault
568c21ab	64	recursively (without ignoring silently all nested events).<br>
b4b2bb06	65	(3) Have various subbuffer sizes for high and low rate channels.<br>
568c21ab	66	(3) Change the byte pair "facility, event" id for a short combining the
568c21ab	67	informatinon.<br>
8fc0ffcd	68	(3) Add sysenter instrumentation on x86. Verify x86_64.<br>
2d31dec1	69	(3) #IBM Fix ppc64 syscall time accounting. Maybe caused by a missing syscall
	70	return instrumentation ?<br>
	71	(3) Process and kernel stack dump for x86_64, for native and compat.<br>
285468d4	72	(4) Add Xen support.<br>
51096bff	73	# <A HREF="mailto:Mathieu Desnoyers <compudj@krystal.dyndns.org>">Mathieu Desnoyers</A><br>
285468d4	74	# <A HREF="mailto:Parisa Heidari <parisa.heidari@polymtl.ca>">Parisa Heidari</A><br>
59ce71d0	75	(4) efficient dynamic event filtering while recording trace.<br>
59ce71d0	76	% Sensis Corp. <A HREF="mailto:Bish, Tim <Tim.Bish@Sensis.com>">Tim Bish</A><br>
1e5a121c	77	(4) instrument kernel bottom half irqsave, spinlocks, rwlocks, seqlocks, semaphores, mutexes, brlock.<br>
cf7147c5	78	(4) In flight recorder mode, have the low traffic channels saved as normal
cf7147c5	79	tracefiles and high traffic channels being flight recorder.<br>
568c21ab	80	(4) Try to use my own non LOCK prefixed version of atomic operations : we are
568c21ab	81	using per-CPU variables, so it should make it possible.<br>
1e5a121c	82	(4) integrate NPTL instrumentation (see
1e5a121c	83	<A HREF="http://nptltracetool.sourceforge.net/">PTT</A>).<br>
cdee9265	84	(4) Probe calibration kernel module.<br>
	85	(5) Discuss with RelayFS upstream to integrate LTTng modifications.<br>
	86	(5) Move to DebugFS for channel files.<br>
3f43b8fb	87	(5) Support CPUs with scalable frequency.<br>
2a341212	88	(5) Integrate LTTng and lttd with LKCD.<br>
575b7e97	89	(7) Integrate periodical dump of perfctr hardware counters.<br>
cc5ce8a0	90	(8) Integrate periodical dump of SystemTAP computed information.<br>
cc5ce8a0	91	(8) Integrate SystemTAP logging with LTTng.<br>
9fd0275c	92	(9) Add support for setjmp/longjmp and jump tables instrumentation to
451c9b19	93	ltt-instrument-functions.<br>
51096bff	94	(9) Make ltt-usertrace-fast support internal heartbeat timer.<br>
6b18b620	95	(3) port LTTng to :<br>
e565223b	96	x86_64<BR>
e4d84ff4	97	#Autodesk <A HREF="mailto:Francois L'Archeveque <fla@discreet.com>">Francois
63eeefc3	98	L'Archeveque</A> for 2.6.9 RedHat Enterprise (patch available in contrib, still
63eeefc3	99	has to be ported to 2.6.14, thanks!)<BR>
162990b3	100	# Wind River for 2.6.14<BR>
e565223b	101	PPC<BR>
e565223b	102	PPC64<BR>
162990b3	103	# Wind River for 2.6.14<BR>
e565223b	104	alpha<BR>
	105	user-mode Linux<BR>
	106	Xen<BR>
841c926b	107	# IBM<BR>
e565223b	108	MIPS<BR>
e565223b	109	MIPS64<BR>
162990b3	110	% Wind River for 2.6.14<BR>
162990b3	111	# Tim Bird <A HREF="mailto:tim.bird@as.sony.com">Tim Bird</A><br>
e565223b	112	S/390<BR>
d804e215	113	RTLinux<BR>
d804e215	114	% Wind River for 2.6.14<BR>
0c4b3d55	115	<br>
15e89ad6	116	<br>
b720b182	117	<br>
b720b182	118	* TODO (low priority)<br>
cbe85414	119	enhance RPM packages for lttng kernel<br>
b720b182	120	Integrate header generation (genevent) in kernel build system.<br>
63eeefc3	121	Export channels via network sockets instead of writing them to disk.<br>
63eeefc3	122	Export buffers with time constraint for "live" visualisation. Use
6b18b620	123	ltt_force_switch periodically from a timer to insure slow channels do not
63eeefc3	124	interfere with viewing.<br>
44397e24	125	Have an optional round-robin mode to write information into multiple channels
44397e24	126	from the same source.<br>
b720b182	127	<br>
15e89ad6	128	* Need to be discussed<br>
af3cfedc	129	Use 2.6.14 RelayFS control files.<br>
b720b182	130	Drop ltt-module-register and ltt-module-unregister, use exported variables.<br>
b720b182	131	drop ltt_filter_control, use functions pointers instead.<br>
b720b182	132	Merge facilities headers into one big header.<br>
	133	Change the name of XML files from XML to something else.<br>
	134	Remove ltt-base.c.<br>
	135	<br>
b720b182	136	<br>
2966f052	137	* lttng patch division (0.5.10+) :<br>
2966f052	138	<br>
451c9b19	139	instrumentation.diff<br>
	140	instrumentation-arm.diff<br>
	141	instrumentation-i386.diff<br>
	142	instrumentation-mips.diff<br>
	143	instrumentation-powerpc.diff<br>
	144	instrumentation-ppc.diff<br>
	145	instrumentation-s390.diff<br>
	146	instrumentation-sh.diff<br>
b720b182	147	ltt-facilities-headers.diff<br>
	148	ltt-facilities-loader.diff<br>
	149	ltt-facilities.diff<br>
b720b182	150	ltt-relayfs.diff<br>
b720b182	151	ltt-core.diff<br>
2966f052	152	ltt-build.diff<br>
b720b182	153	<br>
	154	<br>
	155	Mathieu Desnoyers<br>
1f2c88b1	156
	157
	158	</body>
	159	</html>