diff options
| author | Adrian Hunter | 2014-10-23 13:45:13 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo | 2014-10-29 10:32:49 -0200 |
| commit | 0db15b1e84a59e6e1da5fe6e74c35fe52fa29d92 (patch) | |
| tree | 58834174c0672d033286fd21757091bcbb97ae45 /tools/perf/util/evsel.h | |
| parent | 7e4772dc99a3ebfc53708eff262f7a8155485e85 (diff) | |
perf tools: Add facility to export data in database-friendly way
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 <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
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 <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/evsel.h')
| -rw-r--r-- | tools/perf/util/evsel.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index 163c5604e5d1..d3854c4f52e1 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -54,6 +54,7 @@ struct cgroup_sel; * @is_pos: the position (counting backwards) of the event id (PERF_SAMPLE_ID or * PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if sample_id_all * is used there is an id sample appended to non-sample events + * @priv: And what is in its containing unnamed union are tool specific */ struct perf_evsel { struct list_head node; @@ -73,6 +74,7 @@ struct perf_evsel { union { void *priv; off_t id_offset; + u64 db_id; }; struct cgroup_sel *cgrp; void *handler; |