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Subject[PATCH 08/21] perf tools: Save callchain info for each cumulative entry
Date
When accumulating callchain entry, also save current snapshot of the
chain so that it can show the rest of the chain.

Tested-by: Arun Sharma <asharma@fb.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
tools/perf/util/hist.c | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index c393f13789cb..898cf0155c60 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -752,6 +752,14 @@ iter_add_single_cumulative_entry(struct hist_entry_iter *iter,

he_cache[iter->curr++] = he;

+ callchain_append(he->callchain, &callchain_cursor, sample->period);
+
+ /*
+ * We need to re-initialize the cursor since callchain_append()
+ * advanced the cursor to the end.
+ */
+ callchain_cursor_commit(&callchain_cursor);
+
return hist_entry__inc_addr_samples(he, evsel->idx, al->addr);
}

@@ -765,8 +773,6 @@ iter_next_cumulative_entry(struct hist_entry_iter *iter,
if (node == NULL)
return 0;

- callchain_cursor_advance(&callchain_cursor);
-
return fill_callchain_info(al, node, iter->hide_unresolved);
}

@@ -790,6 +796,11 @@ iter_add_next_cumulative_entry(struct hist_entry_iter *iter,
.parent = iter->parent,
};
int i;
+ struct callchain_cursor cursor;
+
+ callchain_cursor_snapshot(&cursor, &callchain_cursor);
+
+ callchain_cursor_advance(&callchain_cursor);

/*
* Check if there's duplicate entries in the callchain.
@@ -808,6 +819,8 @@ iter_add_next_cumulative_entry(struct hist_entry_iter *iter,

he_cache[iter->curr++] = he;

+ callchain_append(he->callchain, &cursor, sample->period);
+
return hist_entry__inc_addr_samples(he, evsel->idx, al->addr);
}

--
1.7.11.7


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