perf hist: Only allocate callchain_node if processing callchains
The struct callchain_node size is 120 bytes, that are never used when
there are no callchains or '-g none' is specified, so conditionally
allocate it, reducing sizeof(struct hist_entry) from 210 bytes to only
96, greatly speeding the non-callchain processing.
LKML-Reference: <new-submission>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 3819185..1fb13e5 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -110,8 +110,8 @@
if (symbol_conf.use_callchain) {
if (!hit)
- callchain_init(&he->callchain);
- err = append_chain(&he->callchain, data->callchain, syms);
+ callchain_init(he->callchain);
+ err = append_chain(he->callchain, data->callchain, syms);
free(syms);
if (err)