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KS2010: ABI status for tracepointsKS2010: ABI status for tracepointsPosted Nov 2, 2010 13:38 UTC (Tue) by ccurtis (guest, #49713)In reply to: KS2010: ABI status for tracepoints by Cyberax Parent article: KS2010: ABI status for tracepoints
It's not like the situation with ioctls where we have ancient programs that we still need to support. ... today. Once tracepoints become 'stable', they'll be integrated into things like advanced IDEs and profilers. Netbeans uses DTrace on Solaris, for example.
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KS2010: ABI status for tracepoints Posted Nov 2, 2010 13:46 UTC (Tue) by Cyberax (✭ supporter ✭, #52523) [Link]
So? IDEs are updated fairly frequently (and usually automatically). And anyway, if a tracepoint becomes obsolete its usefulness can actually be negative. They are tied to kernel internals by their design.
With ioctls it's different. Old user-space programs might not be tied to kernel at all.
KS2010: ABI status for tracepoints Posted Nov 2, 2010 18:50 UTC (Tue) by NAR (subscriber, #1313) [Link]
Maybe tracepoints should be stable for a distribution. E.g. Netbeans for RHEL 6 or SuSE 11 could support a different but still stable set of tracepoints.
KS2010: ABI status for tracepoints Posted Nov 2, 2010 19:07 UTC (Tue) by Cyberax (✭ supporter ✭, #52523) [Link]
That would put a burden on both maintainers of NetBeans and RHEL/SuSE since their release cycles are not likely to be the same.
It's better to just guarantee that for N stable releases tracepoints will remain stable.
KS2010: ABI status for tracepoints Posted Nov 3, 2010 8:35 UTC (Wed) by NAR (subscriber, #1313) [Link]
Maybe it is time to synchronize their release cycles? It is possibly wise to use the same longer supported kernel (like 2.6.27 or 2.6.32) in longer supported distributions anyway, so the tracepoints would be the same. At this point they just have to pick the same NetBeans version...
KS2010: ABI status for tracepoints Posted Nov 3, 2010 11:50 UTC (Wed) by zdzichu (subscriber, #17118) [Link]
Exactly. PowerTOP on Solaris was implemented using its tracepoints implementation (DTrace). It was 2.5 years ago.
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