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| author |   Kan Liang <kan.liang@linux.intel.com> | 2020-03-19 13:25:10 -0700 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-04-18 09:05:01 -0300 |
| commit | 9c6c3f471d85a9b0bcda3ce6fc1e2646685e3f60 (patch) | |
| tree | 56ded07276f2adf4b3f1a0d0d32430bca581d4d2 /tools/perf/util/thread.h | |
| parent | perf thread: Add a knob for LBR stitch approach (diff) | |
| download | linux-dev-9c6c3f471d85a9b0bcda3ce6fc1e2646685e3f60.tar.xz linux-dev-9c6c3f471d85a9b0bcda3ce6fc1e2646685e3f60.zip | |
perf thread: Save previous sample for LBR stitching approach
To retrieve the overwritten LBRs from previous sample for LBR stitching
approach, perf has to save the previous sample.
Only allocate the struct lbr_stitch once, when LBR stitching approach is
enabled and kernel supports hw_idx.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Pavel Gerasimov <pavel.gerasimov@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com>
Link: http://lore.kernel.org/lkml/20200319202517.23423-11-kan.liang@linux.intel.com
[ Use zalloc()/zfree() for thread->lbr_stitch ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/thread.h')
| -rw-r--r-- | tools/perf/util/thread.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h index 95294050cff2..34eb61cee6a4 100644 --- a/tools/perf/util/thread.h +++ b/tools/perf/util/thread.h @@ -5,6 +5,7 @@ #include <linux/refcount.h> #include <linux/rbtree.h> #include <linux/list.h> +#include <linux/zalloc.h> #include <stdio.h> #include <unistd.h> #include <sys/types.h> @@ -13,6 +14,7 @@ #include <strlist.h> #include <intlist.h> #include "rwsem.h" +#include "event.h" struct addr_location; struct map; @@ -20,6 +22,10 @@ struct perf_record_namespaces; struct thread_stack; struct unwind_libunwind_ops; +struct lbr_stitch { + struct perf_sample prev_sample; +}; + struct thread { union { struct rb_node rb_node; @@ -49,6 +55,7 @@ struct thread { /* LBR call stack stitch */ bool lbr_stitch_enable; + struct lbr_stitch *lbr_stitch; }; struct machine; @@ -145,4 +152,9 @@ static inline bool thread__is_filtered(struct thread *thread) return false; } +static inline void thread__free_stitch_list(struct thread *thread) +{ + zfree(&thread->lbr_stitch); +} + #endif /* __PERF_THREAD_H */ |