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author | Jim Keniston <jkenisto@us.ibm.com> | 2009-04-15 16:02:58 -0700 |
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committer | Jim Keniston <jkenisto@us.ibm.com> | 2009-04-15 16:02:58 -0700 |
commit | 900686f5e209099d493a15f4e36a5030dc0aa8be (patch) | |
tree | 405757c92915c516cd0ff28e217a000843573f3f /NEWS | |
parent | 2020af07c2a7f58538874ce652b52a6883f7ada0 (diff) | |
parent | 7c2136cfc88d68cfc5eb490444dc25c7dc1c0632 (diff) | |
download | systemtap-steved-900686f5e209099d493a15f4e36a5030dc0aa8be.tar.gz systemtap-steved-900686f5e209099d493a15f4e36a5030dc0aa8be.tar.xz systemtap-steved-900686f5e209099d493a15f4e36a5030dc0aa8be.zip |
Merge branch 'master' of ssh://kenistoj@sources.redhat.com/git/systemtap
Diffstat (limited to 'NEWS')
-rw-r--r-- | NEWS | 40 |
1 files changed, 26 insertions, 14 deletions
@@ -1,19 +1,31 @@ +* What's new + +- The overlapping process.* tapsets are now separated. Those probe points + documented in stapprobes(3stap) remain the same. Those that were formerly + in stapprobes.process(3stap) have been renamed to kprocess, to reflect + their kernel perspective on processes. + +- The --skip-badvars option now also suppresses run-time error + messages that would otherwise result from erroneous memory accesses. + Such accesses can originate from $context expressions fueled by + erroneous debug data, or by kernel_{long,string,...}() tapset calls. + * What's new in version 0.9.5 - - New probes process().insn and process().insn.block that allows - inspection of the process after each instruction or block of - instructions executed. So to count the total number of instructions - a process executes during a run do something like: - $ stap -e 'global steps; probe process("/bin/ls").insn {steps++} - probe end {printf("Total instructions: %d\n", steps);}' \ - -c /bin/ls - This feature can slow down execution of a process somewhat. - - - Systemtap probes and function man pages extracted from the tapsets - are now available under 3stap. To show the page for probe vm.pagefault - or the stap function pexecname do: - $ man 3stap vm.pagefault - $ man 3stap pexecname +- New probes process().insn and process().insn.block that allows + inspection of the process after each instruction or block of + instructions executed. So to count the total number of instructions + a process executes during a run do something like: + $ stap -e 'global steps; probe process("/bin/ls").insn {steps++} + probe end {printf("Total instructions: %d\n", steps);}' \ + -c /bin/ls + This feature can slow down execution of a process somewhat. + +- Systemtap probes and function man pages extracted from the tapsets + are now available under 3stap. To show the page for probe vm.pagefault + or the stap function pexecname do: + $ man 3stap vm.pagefault + $ man 3stap pexecname - Kernel tracepoints are now supported for probing predefined kernel events without any debuginfo. Tracepoints incur less overhead than |