ea8e08a16a
perf tools: Add option macro OPT_CALLBACK_OPTARG
...
Add an option macro that is the same as OPT_CALLBACK except that the
argument is optional and it is possible to associate additional data
with it.
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/1405332185-4050-31-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2014-07-16 17:57:36 -03:00
f6d313699a
perf tools: Add feature test for __sync_val_compare_and_swap
...
Add a feature test for __sync_val_compare_and_swap() and
__sync_bool_compare_and_swap()
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/1405332185-4050-30-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2014-07-16 17:57:36 -03:00
a8a8f3eb5d
perf evlist: Pass mmap parameters in a struct
...
In preparation for adding more mmap parameters, pass existing parameters
in a struct.
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/1405332185-4050-29-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2014-07-16 17:57:36 -03:00
919d86d3a3
perf session: Flag if the event stream is entirely in memory
...
Flag if the event stream is a file that has been mmapped in one go.
This is useful, for example, if a tool needs to keep an event for later
reference. If the new flag is set, a pointer to the event can be
retained, otherwise the event must be copied.
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/1405332185-4050-28-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2014-07-16 17:57:36 -03:00
9c00a81b6a
perf symbols: Add ability to iterate over a dso's symbols
...
Expose dso__first_symbol() and dso__next_symbol() to make it possible to
iterate over a dso's symbols.
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/1405332185-4050-27-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2014-07-16 17:57:35 -03:00
bdac0bcf77
perf symbols: Do not attempt to read data from kallsyms
...
Record kallsyms binary type so that tools will not
attempt to read binary data from it.
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/1405332185-4050-20-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2014-07-16 17:57:35 -03:00
c6d8f2a4a0
perf symbols: Record whether a dso is 64-bit
...
Add a flag to 'struct dso' to record if the dso is 64-bit or not.
Update the flag when reading the ELF.
This is needed for instruction decoding. For example, x86 instruction
decoding depends on whether or not the 64-bit instruction set is used.
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/1405332185-4050-18-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2014-07-16 17:57:35 -03:00
5173fbb8a1
perf buildid-cache: Apply force option to copying kcore
...
Currently a copy of kcore is not made if there is one already with the
same modules at the same addresses.
Change this to make a copy anyway if the force (-f) option is also used.
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/1405332185-4050-15-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2014-07-16 17:57:35 -03:00
4d40b051b1
perf callchain: Fix appending a callchain from a previous sample
...
hist_entry__append_callchain() must check if the sample has a callcahin
or it will append the callchain from a previous sample.
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/1405332185-4050-12-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2014-07-16 17:57:35 -03:00
e38b43c3f3
perf inject: Fix build id injection
...
Build Ids won't be injected unless the build id feature flag is set.
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/1405332185-4050-11-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2014-07-16 17:57:34 -03:00
a2f3b6bf0a
perf symbols: Fix missing GNU IFUNC symbols
...
Symbols of type STT_GNU_IFUNC are functions so accept them as such.
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/1405332185-4050-10-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2014-07-16 17:57:34 -03:00
1f2a7069b6
perf tools: Fix missing kernel map load
...
thread__find_addr_map() falls back to trying the kernel maps if the
address is negative and is not found in userspace maps. As commented in
the code, the kernel maps must be "loaded" before use. This patch
ensures that happens under the fallback condition also.
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/1405332185-4050-8-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2014-07-16 17:57:34 -03:00
39e09d40be
perf record: Select comm_exec flag if supported
...
The comm_exec flag on the attribute can later be found in the perf.data
file allowing a tool to know in advance if the captured data has the
flag.
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/1405332185-4050-5-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2014-07-16 17:57:34 -03:00
022c50d09c
perf script: Display PERF_RECORD_MISC_COMM_EXEC flag
...
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/1405332185-4050-4-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2014-07-16 17:57:34 -03:00
1fcb876863
perf machine: Fix the value used for unknown pids
...
The value used for unknown pids cannot be zero because that is used by
the "idle" task.
Use -1 instead. Also handle the unknown pid case when creating map
groups.
Note that, threads with an unknown pid should not occur because fork (or
synthesized) events precede the thread's existence.
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/1405332185-4050-2-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2014-07-16 17:57:33 -03:00
57608cfd88
perf script: Provide additional sample information on generic events
...
To python scripts, including pid, tid, and cpu for which the event was
recorded.
At the moment, the pointer to the sample struct is passed to scripts,
which seems to be of little use.
The patch puts this information in dictionaries for easy access by
Python scripts.
Signed-off-by: Joseph Schuchart <joseph.schuchart@tu-dresden.de >
Acked-by: Thomas Ilsche <thomas.ilsche@tu-dresden.de >
Cc: Ingo Molnar <mingo@redhat.com >
Cc: Jiri Olsa <jolsa@redhat.com >
Cc: Namhyung Kim <namhyung@gmail.com >
Cc: Paul Mackerras <paulus@samba.org >
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl >
Cc: Thomas Ilsche <thomas.ilsche@tu-dresden.de >
Link: http://lkml.kernel.org/r/53BE7E20.8080500@tu-dresden.de
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2014-07-16 17:57:33 -03:00
0f5f5bcd11
perf script: Add callchain to generic and tracepoint events
...
This provides valuable information for tracing performance problems.
Since this change alters the interface for the python scripts, also
adjust the script generation and the provided scripts.
Signed-off-by: Joseph Schuchart <joseph.schuchart@tu-dresden.de >
Acked-by: Thomas Ilsche <thomas.ilsche@tu-dresden.de >
Cc: Ingo Molnar <mingo@redhat.com >
Cc: Jiri Olsa <jolsa@redhat.com >
Cc: Namhyung Kim <namhyung@gmail.com >
Cc: Paul Mackerras <paulus@samba.org >
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl >
Cc: Thomas Ilsche <thomas.ilsche@tu-dresden.de >
Link: http://lkml.kernel.org/r/53BE7E1B.10503@tu-dresden.de
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2014-07-16 17:57:33 -03:00
05f832e3a2
perf script: Add missing calls to Py_DECREF for return values
...
Signed-off-by: Joseph Schuchart <joseph.schuchart@tu-dresden.de >
Cc: Jiri Olsa <jolsa@redhat.com >
Cc: Namhyung Kim <namhyung@gmail.com >
Cc: Paul Mackerras <paulus@samba.org >
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl >
Cc: Thomas Ilsche <thomas.ilsche@tu-dresden.de >
Link: http://lkml.kernel.org/r/53BD4EBF.5050407@tu-dresden.de
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2014-07-16 17:57:33 -03:00
3be8e2a0a5
perf kvm: Add stat support on s390
...
On s390, the vmexit event has a tree-like structure: between
exit_event_begin and exit_event_end several other events may happen and
with each of them refining the previous ones.
This patch adds a decoder for such events to the generic code and also
the files <asm/kvm_perf.h> and kvm-stat.c for s390.
Commands 'perf kvm stat record', 'report' and 'live' are supported.
Reviewed-by: David Ahern <dsahern@gmail.com >
Signed-off-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com >
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com >
Cc: Christian Borntraeger <borntraeger@de.ibm.com >
Cc: Cornelia Huck <cornelia.huck@de.ibm.com >
Cc: David Ahern <dsahern@gmail.com >
Cc: Ingo Molnar <mingo@kernel.org >
Cc: Jiri Olsa <jolsa@redhat.com >
Cc: Paul Mackerras <paulus@samba.org >
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl >
Link: http://lkml.kernel.org/r/1404397747-20939-5-git-send-email-yarygin@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2014-07-16 17:57:33 -03:00
54c801ff71
perf kvm: Add skip_event() for --duration option
...
Current code skips output of the x86 specific HLT event in order to
avoid flooding the output with enabled --duration option. The events to
be skipped should be architecture dependent, though.
Let's add an architecture specific array of events to be skipped and
introduce a skip_event() function checking against that array.
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com >
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com >
Reviewed-by: David Ahern <dsahern@gmail.com >
Signed-off-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com >
Cc: Christian Borntraeger <borntraeger@de.ibm.com >
Cc: Cornelia Huck <cornelia.huck@de.ibm.com >
Cc: David Ahern <dsahern@gmail.com >
Cc: Ingo Molnar <mingo@kernel.org >
Cc: Jiri Olsa <jolsa@redhat.com >
Cc: Paul Mackerras <paulus@samba.org >
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl >
Link: http://lkml.kernel.org/r/1404397747-20939-4-git-send-email-yarygin@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2014-07-16 17:57:32 -03:00
9daa81239e
perf kvm: Move arch specific code into arch/
...
Parts of a 'perf kvm stat' code make sense only for x86.
Let's move this code into the arch/x86/kvm-stat.c file and add
util/kvm-stat.h for generic structure definitions.
Add a global array 'kvm_reg_events_ops' for accessing the arch-specific
'kvm_events_ops' from generic code.
Since the several global arrays (i.e. 'kvm_events_tp') have been moved
to arch/*, we can not know their sizes and use them directly in
builtin-kvm.c. This patch fixes that problem by adding trimming NULL
element to each array and changing the behavior of their handlers in
generic code.
Reviewed-by: David Ahern <dsahern@gmail.com >
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com >
Signed-off-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com >
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com >
Cc: Christian Borntraeger <borntraeger@de.ibm.com >
Cc: Cornelia Huck <cornelia.huck@de.ibm.com >
Cc: David Ahern <dsahern@gmail.com >
Cc: Ingo Molnar <mingo@kernel.org >
Cc: Jiri Olsa <jolsa@redhat.com >
Cc: Paul Mackerras <paulus@samba.org >
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl >
Link: http://lkml.kernel.org/r/1404397747-20939-3-git-send-email-yarygin@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2014-07-16 17:57:32 -03:00
44b3802122
perf kvm: Use defines of kvm events
...
Currently perf-kvm uses string literals for kvm event names, but it
works only for x86, because other architectures may have other names for
those events.
To reduce dependence on architecture, we add <asm/kvm_perf.h> file with
defines for:
- kvm_entry and kvm_exit events,
- exit reason field name in kvm_exit event,
- length of exit reasons strings,
- vcpu_id field name in kvm trace events,
and replace literals in perf-kvm.
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com >
Reviewed-by David Ahern <dsahern@gmail.com >
Signed-off-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com >
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com >
Cc: Christian Borntraeger <borntraeger@de.ibm.com >
Cc: Cornelia Huck <cornelia.huck@de.ibm.com >
Cc: David Ahern <dsahern@gmail.com >
Cc: Ingo Molnar <mingo@kernel.org >
Cc: Jiri Olsa <jolsa@redhat.com >
Cc: Paul Mackerras <paulus@samba.org >
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl >
Link: http://lkml.kernel.org/r/1404397747-20939-2-git-send-email-yarygin@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2014-07-16 17:57:32 -03:00
ff2ebe46e1
Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf into perf/core
...
Pull perf/core improvements and fixes from Jiri Olsa:
* Add IO mode into timechart command (Stanislav Fomichev)
Signed-off-by: Jiri Olsa <jolsa@kernel.org >
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2014-07-16 13:48:13 +02:00
f4aa84fc2a
Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core
...
Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:
User visible changes:
o Prep patches to support 'perf kvm stat' on s390 (Alexander Yarygin)
o Add pagefault statistics in 'trace' (Stanislav Fomichev)
o Add header for columns in 'top' and 'report' TUI browsers (Jiri Olsa)
o Add pagefault statistics in 'trace' (Stanislav Fomichev)
Build fixes:
o Fix build on 32-bit systems (Arnaldo Carvalho de Melo)
Cleanups:
o Convert open coded equivalents to asprintf() (Andy Shevchenko)
Plumbing changes:
o Allow reserving a row for header purposes in the hists browser (Arnaldo Carvalho de Melo)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2014-07-16 13:46:34 +02:00
fbe26abe11
perf: Add vm_ops->name call for mmap event name retrieval
...
The following patch added another way to get mmap name: 78d683e838jolsa@kernel.org >
Acked-by: Andy Lutomirski <luto@amacapital.net >
Signed-off-by: Peter Zijlstra <peterz@infradead.org >
Cc: Namhyung Kim <namhyung@kernel.org >
Cc: Arnaldo Carvalho de Melo <acme@kernel.org >
Cc: Paul Mackerras <paulus@samba.org >
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com >
Cc: David Ahern <dsahern@gmail.com >
Cc: Frederic Weisbecker <fweisbec@gmail.com >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Link: http://lkml.kernel.org/r/1405353439-14211-1-git-send-email-jolsa@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2014-07-16 13:31:22 +02:00
Adrian Hunter
Joseph Schuchart
Alexander Yarygin
Ingo Molnar
Jiri Olsa