X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=ltt%2Fbranches%2Fpoly%2Fdoc%2Fdeveloper%2Fltt-experimental-rewrite.html;h=700c02c5f547e7643f66da2146886a2573ea0059;hb=fc5993d2d131ee15e37fef67c07c5d02c2ea53fa;hp=f3d82989d826805ef3f59008d7a85752a10c2cfe;hpb=baffa645f5274a7feeb94cdcdf8eb0995b2ec107;p=lttv.git diff --git a/ltt/branches/poly/doc/developer/ltt-experimental-rewrite.html b/ltt/branches/poly/doc/developer/ltt-experimental-rewrite.html index f3d82989..700c02c5 100644 --- a/ltt/branches/poly/doc/developer/ltt-experimental-rewrite.html +++ b/ltt/branches/poly/doc/developer/ltt-experimental-rewrite.html @@ -1,6 +1,39 @@ -Here the status of the work in progress for LTT experimental
+
LTTV & LTTng roadmap
+Here are roadmaps for the LTTV and LTTng development. I use a priority indice +for the TODO items :
+1 : very high priority
+10: lowest priority
+
+
+LTTV Roadmap
+
+* TODO
+migrate align to lttv parser.
+create a event rate graphical view : Will be useful in conjonction with the + filter.
+create an analysis of function time (like a precise gprof)
+ -> with gcc -f inline-functions
+
+
+* Done
+Buffer aligned on page boundary -> use valloc.
+per struct (struct align=x) support added to genevent (partial).
+Add offset align generation for structs to genevent.
+make lttv aware of the per facility long, void* and size_t types.
+Read current trace header and buffer header.
+
+LTT Next Generation Roadmap
+
+* TODO
+make LTT tracing code completely atomic (thus remove locks)
+add efficient and secure user space tracing. (1 month)
+integrate LTTng State Dump : missing irq and process state.
+add genevent full functionnality : alignment, array, sequences, nested +structures.
+add gcc -finstrument-functions instrumentation
+

* Done
remove ltt-headers.h
@@ -12,13 +45,24 @@ Fix the traps -> disable nested logging for now.
Use per cpu spinlock on trace list.
Finish the control module, libltt and lttctl : netlink interface
Finish integrating lttctl with lttd.
-
-
-* TODO
+fix lttctl signal waiting : use a flag.
+Add ltt_write_commit_counter call to genevent.
Add information in the buffer header : buffer size, etc etc...
-> this information is so small that we can repeat it. Makes flight recorder easier to decode.
-Add trace start structure to facility channel.
+Add trace start structure to buffer start header.
+fix genevent : take no lock if num traces active is 0.
+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).
+fix structures alignment, array and sequences too. -> trace dynamic.
+add per facility alignment (inside structures).
+add control of alignment.
+add control for subbuffer size and number of subbuffers.
+Add reserve - get TSC - alignment atomicity through the use of cmpxchg.
+Add configurable alignment (LTT_ALIGNMENT).



@@ -41,16 +85,13 @@ Remove the callback struct from the trace struct.



-* Next experimental release patch division :
+* lttng patch division (0.4.2+) :

ltt-instrumentation.diff
- - ltt-configmenu.diff (put in ltt-core.diff)
ltt-facilities-headers.diff
ltt-facilities-loader.diff
ltt-facilities.diff
-ltt-instrumentation.diff
ltt-relayfs.diff
-ltt-time.diff
ltt-core.diff