linux/tools/perf/util/thread.h, branch v4.5

perf tools: Elliminate alignment holes

2015-05-18T13:17:33Z

perf_evsel: Before: /* size: 320, cachelines: 5, members: 35 */ /* sum members: 304, holes: 3, sum holes: 16 */ After: /* size: 304, cachelines: 5, members: 35 */ /* last cacheline: 48 bytes */ perf_evlist: Before: /* size: 2544, cachelines: 40, members: 17 */ /* sum members: 2533, holes: 2, sum holes: 11 */ /* last cacheline: 48 bytes */ After: /* size: 2536, cachelines: 40, members: 17 */ /* sum members: 2533, holes: 1, sum holes: 3 */ /* last cacheline: 40 bytes */ timechart: Before: /* size: 288, cachelines: 5, members: 21 */ /* sum members: 271, holes: 2, sum holes: 10 */ /* padding: 7 */ /* last cacheline: 32 bytes */ After: /* size: 272, cachelines: 5, members: 21 */ /* sum members: 271, holes: 1, sum holes: 1 */ /* last cacheline: 16 bytes */ thread: Before: /* size: 112, cachelines: 2, members: 15 */ /* sum members: 101, holes: 2, sum holes: 11 */ /* last cacheline: 48 bytes */ After: /* size: 104, cachelines: 2, members: 15 */ /* sum members: 101, holes: 1, sum holes: 3 */ /* last cacheline: 40 bytes */ Cc: Adrian Hunter Cc: Borislav Petkov Cc: David Ahern Cc: Don Zickus Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Namhyung Kim Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-a543w7zjl9yyrg9nkf1teukp@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Use atomic_t to implement thread__{get,put} refcnt

2015-05-08T19:16:23Z

Fixing bugs in 'perf top' where the used thread unsafe 'struct thread' refcount implementation was falling apart because we really use two threads. Acked-by: David Ahern Cc: Adrian Hunter Cc: Borislav Petkov Cc: Don Zickus Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Namhyung Kim Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-hil2hol294u5ntcuof4jhmn6@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Add pid/tid filtering to report and script commands

2015-03-24T16:02:46Z

The 'record' and 'top' tools already allow a user to specify a CSV of pids and/or tids of tasks to collect data. Add those options to the 'report' and 'script' analysis commands to only consider samples related to the given pids/tids. This is also inline with the existing comm option. Signed-off-by: David Ahern Cc: Adrian Hunter Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Namhyung Kim Cc: Stephane Eranian Link: http://lkml.kernel.org/r/1427212361-7066-1-git-send-email-dsahern@gmail.com Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Reference count struct thread

2015-03-03T03:17:08Z

We need to do that to stop accumulating entries in the dead_threads linked list, i.e. we were keeping references to threads in struct hists that continue to exist even after a thread exited and was removed from the machine threads rbtree. We still keep the dead_threads list, but just for debugging, allowing us to iterate at any given point over the threads that still are referenced by things like struct hist_entry. Cc: Adrian Hunter Cc: Borislav Petkov Cc: David Ahern Cc: Don Zickus Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Namhyung Kim Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-3ejvfyed0r7ue61dkurzjux4@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Add a thread stack for synthesizing call chains

2014-11-03T20:10:59Z

Add a thread stack for synthesizing call chains from call and return events. Signed-off-by: Adrian Hunter Acked-by: Jiri Olsa Cc: David Ahern Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/r/1414678188-14946-2-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Add facility to export data in database-friendly way

2014-10-29T12:32:49Z

This patch introduces an abstraction for exporting sample data in a database-friendly way. The abstraction does not implement the actual output. A subsequent patch takes this facility into use for extending the script interface. The abstraction is needed because static data like symbols, dsos, comms etc need to be exported only once. That means allocating them a unique identifier and recording it on each structure. The member 'db_id' is used for that. 'db_id' is just a 64-bit sequence number. Exporting centres around the db_export__sample() function which exports the associated data structures if they have not yet been allocated a db_id. Signed-off-by: Adrian Hunter Cc: David Ahern Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/r/1414061124-26830-6-git-send-email-adrian.hunter@intel.com [ committer note: Stash db_id using symbol_conf.priv_size + symbol__priv() and foo->priv areas ] Signed-off-by: Arnaldo Carvalho de Melo

perf tools: A thread's machine can be found via thread->mg->machine

2014-10-29T12:32:46Z

So stop passing both machine and thread to several thread methods, reducing function signature length. Cc: Adrian Hunter Cc: Borislav Petkov Cc: David Ahern Cc: Don Zickus Cc: Frederic Weisbecker Cc: Jean Pihet Cc: Jiri Olsa Cc: Mike Galbraith Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-ckcy19dcp1jfkmdihdjcqdn1@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Identify which comms are from exec

2014-08-13T22:23:08Z

For grouping together all the data from a single execution, which is needed for pairing calls and returns e.g. any outstanding calls when a process exec's will never return. Signed-off-by: Adrian Hunter Cc: David Ahern Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/r/1406786474-9306-2-git-send-email-adrian.hunter@intel.com [ Remove testing if comm->exec is false before setting it to true ] Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Add cpu to struct thread

2014-07-23T14:27:50Z

Tools may wish to track on which cpu a thread is running. Add 'cpu' to struct thread for that purpose. This will be used to determine the cpu when decoding a per-thread Instruction Trace. E.g: Intel PT decoding uses sched_switch events to determine which task is running on which cpu. The Intel PT data comes straight from the hardware which doesn't know about linux threads. Signed-off-by: Adrian Hunter Cc: David Ahern Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/r/1406035081-14301-16-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Share map_groups among threads of the same group

2014-04-28T11:43:33Z

Sharing map groups within all process threads. This way there's only one copy of mmap info and it's reachable from any thread within the process. Original-patch-by: Arnaldo Carvalho de Melo Acked-by: Namhyung Kim Cc: Adrian Hunter Cc: Corey Ashford Cc: David Ahern Cc: Don Zickus Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Mike Galbraith Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/r/1397490723-1992-5-git-send-email-jolsa@redhat.com Signed-off-by: Jiri Olsa