linux-stable.git/tools/perf/util/db-export.c, branch v5.3

perf db-export: Export switch events

2019-07-10T15:35:38+00:00

Export details of switch events including the threads and their current
comms.

Signed-off-by: Adrian Hunter 
Cc: Jiri Olsa 
Link: http://lkml.kernel.org/r/20190710085810.1650-20-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf db-export: Factor out db_export__threads()

2019-07-10T15:35:18+00:00

In preparation for exporting switch events, factor out
db_export__threads().

Signed-off-by: Adrian Hunter 
Cc: Jiri Olsa 
Link: http://lkml.kernel.org/r/20190710085810.1650-19-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf db-export: Also export thread's current comm

2019-07-10T15:14:07+00:00

Currently, the initial comm of the main thread is exported. Export also
a thread's current comm. That better supports the tracing of
multi-threaded applications that set different comms for different
threads to make it easier to distinguish them.

Signed-off-by: Adrian Hunter 
Cc: Jiri Olsa 
Link: http://lkml.kernel.org/r/20190710085810.1650-13-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf db-export: Factor out db_export__comm()

2019-07-10T15:13:51+00:00

In preparation for exporting the current comm for a thread, factor out
db_export__comm().

Signed-off-by: Adrian Hunter 
Cc: Jiri Olsa 
Link: http://lkml.kernel.org/r/20190710085810.1650-12-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf db-export: Export comm details

2019-07-10T15:13:08+00:00

In preparation for exporting the current comm for a thread, export comm
thread id, start time and exec flag.

Signed-off-by: Adrian Hunter 
Cc: Jiri Olsa 
Link: http://lkml.kernel.org/r/20190710085810.1650-9-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf db-export: Fix a white space issue in db_export__sample()

2019-07-10T15:12:56+00:00

Fix a white space issue in db_export__sample()

Signed-off-by: Adrian Hunter 
Cc: Jiri Olsa 
Link: http://lkml.kernel.org/r/20190710085810.1650-8-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf db-export: Move export__comm_thread into db_export__sample()

2019-07-10T15:12:45+00:00

Move call to db_export__comm_thread() from db_export__thread() into
db_export__sample() because it makes the code easier to understand, and
add explanatory comments.

Signed-off-by: Adrian Hunter 
Cc: Jiri Olsa 
Link: http://lkml.kernel.org/r/20190710085810.1650-7-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf db-export: Export comm before exporting thread

2019-07-10T15:12:25+00:00

Export comm before exporting the non-main thread because
db_export__thread() also exports the comm_thread.

Signed-off-by: Adrian Hunter 
Cc: Jiri Olsa 
Link: http://lkml.kernel.org/r/20190710085810.1650-6-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf db-export: Export main_thread in db_export__sample()

2019-07-10T15:12:05+00:00

Export main_thread in db_export__sample() because it makes the code
easier to understand, and prepares db_export__thread() for further
simplification.

Signed-off-by: Adrian Hunter 
Cc: Jiri Olsa 
Link: http://lkml.kernel.org/r/20190710085810.1650-5-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf db-export: Pass main_thread to db_export__thread()

2019-07-10T15:11:04+00:00

Calls to db_export__thread() already have main_thread so there is no
reason to get it again, instead pass it as a parameter. Note that one
difference in this approach is that the main thread is not created if it
does not exist. It is better if it is not created because:

   - If main_thread is being traced it will have been created already.

   - If it is not being traced, there will be no other information about
     it, and it will never get deleted because there will be no EXIT event.

Signed-off-by: Adrian Hunter 
Cc: Jiri Olsa 
Link: http://lkml.kernel.org/r/20190710085810.1650-4-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo