From: Jin Yao <yao....@linux.intel.com> We will expand perf diff to support diff cycles of individual programs blocks, so it requires all data files having branch stacks.
This patch checks HEADER_BRANCH_STACK in header, and only set the flag has_br_stack when HEADER_BRANCH_STACK are set in all data files. v2: --- Move check_file_brstack() from __cmd_diff() to cmd_diff(). Because later patch will check flag 'has_br_stack' before ui_init(). Signed-off-by: Jin Yao <yao....@linux.intel.com> Reviewed-by: Jiri Olsa <jo...@kernel.org> Cc: Alexander Shishkin <alexander.shish...@linux.intel.com> Cc: Andi Kleen <a...@linux.intel.com> Cc: Jin Yao <yao....@intel.com> Cc: Kan Liang <kan.li...@linux.intel.com> Cc: Peter Zijlstra <pet...@infradead.org> Link: http://lkml.kernel.org/r/1561713784-30533-4-git-send-email-yao....@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/builtin-diff.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c index 6e7920793729..a7e04202955c 100644 --- a/tools/perf/builtin-diff.c +++ b/tools/perf/builtin-diff.c @@ -32,6 +32,7 @@ struct perf_diff { struct perf_time_interval *ptime_range; int range_size; int range_num; + bool has_br_stack; }; /* Diff command specific HPP columns. */ @@ -873,6 +874,31 @@ static int parse_time_str(struct data__file *d, char *abstime_ostr, return ret; } +static int check_file_brstack(void) +{ + struct data__file *d; + bool has_br_stack; + int i; + + data__for_each_file(i, d) { + d->session = perf_session__new(&d->data, false, &pdiff.tool); + if (!d->session) { + pr_err("Failed to open %s\n", d->data.path); + return -1; + } + + has_br_stack = perf_header__has_feat(&d->session->header, + HEADER_BRANCH_STACK); + perf_session__delete(d->session); + if (!has_br_stack) + return 0; + } + + /* Set only all files having branch stacks */ + pdiff.has_br_stack = true; + return 0; +} + static int __cmd_diff(void) { struct data__file *d; @@ -1487,6 +1513,9 @@ int cmd_diff(int argc, const char **argv) if (data_init(argc, argv) < 0) return -1; + if (check_file_brstack() < 0) + return -1; + if (ui_init() < 0) return -1; -- 2.20.1
