Messages in this thread Patch in this message | | | From | Arnaldo Carvalho de Melo <> | Subject | [PATCH 07/10] perf callchain: Introduce callchain_cursor__copy() | Date | Wed, 7 Dec 2016 13:53:32 -0300 |
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From: Namhyung Kim <namhyung@kernel.org>
The callchain_cursor__copy() function is to save current callchain captured by a cursor. It'll be used to keep callchains when switching to idle task for each cpu.
Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20161206034010.6499-3-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/util/callchain.c | 27 +++++++++++++++++++++++++++ tools/perf/util/callchain.h | 3 +++ 2 files changed, 30 insertions(+)
diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c index 823befd8209a..42922512c1c6 100644 --- a/tools/perf/util/callchain.c +++ b/tools/perf/util/callchain.c @@ -1234,3 +1234,30 @@ int callchain_node__make_parent_list(struct callchain_node *node) } return -ENOMEM; } + +int callchain_cursor__copy(struct callchain_cursor *dst, + struct callchain_cursor *src) +{ + int rc = 0; + + callchain_cursor_reset(dst); + callchain_cursor_commit(src); + + while (true) { + struct callchain_cursor_node *node; + + node = callchain_cursor_current(src); + if (node == NULL) + break; + + rc = callchain_cursor_append(dst, node->ip, node->map, node->sym, + node->branch, &node->branch_flags, + node->nr_loop_iter, node->samples); + if (rc) + break; + + callchain_cursor_advance(src); + } + + return rc; +} diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h index d9c70dccf06a..35c8e379530f 100644 --- a/tools/perf/util/callchain.h +++ b/tools/perf/util/callchain.h @@ -216,6 +216,9 @@ static inline void callchain_cursor_advance(struct callchain_cursor *cursor) cursor->pos++; } +int callchain_cursor__copy(struct callchain_cursor *dst, + struct callchain_cursor *src); + struct option; struct hist_entry; -- 2.9.3
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