Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | Date | Mon, 30 Jan 2023 16:04:58 +0530 | Subject | Re: [PATCH v3 1/2] perf script: Show branch speculation info | From | Sandipan Das <> |
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On 1/30/2023 11:29 AM, Sandipan Das wrote: > Show the branch speculation info if provided by the branch recording > hardware feature. This can be useful for optimizing code further. > > The speculation info is appended to the end of the list of fields so any > existing tools that use "/" as a delimiter for access fields via an index > remain unaffected. Also show "-" instead of "N/A" when speculation info > is unavailable because "/" is used as the field separator. > > E.g. > > $ perf record -j any,u,save_type ./test_branch > $ perf script --fields brstacksym > > Before: > > [...] > check_match+0x60/strcmp+0x0/P/-/-/0/CALL > do_lookup_x+0x3c5/check_match+0x0/P/-/-/0/CALL > [...] > > After: > > [...] > check_match+0x60/strcmp+0x0/P/-/-/0/CALL/NON_SPEC_CORRECT_PATH > do_lookup_x+0x3c5/check_match+0x0/P/-/-/0/CALL/NON_SPEC_CORRECT_PATH > [...] > > Signed-off-by: Sandipan Das <sandipan.das@amd.com> > --- > tools/perf/builtin-script.c | 5 +++-- > tools/perf/util/branch.c | 15 +++++++++++++++ > tools/perf/util/branch.h | 2 ++ > tools/perf/util/evsel.c | 15 ++++++++++++--- > 4 files changed, 32 insertions(+), 5 deletions(-) >
Sorry but I realized later that this change breaks the builtin branch test. The additional change below fixes that.
diff --git a/tools/perf/tests/shell/test_brstack.sh b/tools/perf/tests/shell/test_brstack.sh index 59195eb80052..1c49d8293003 100755 --- a/tools/perf/tests/shell/test_brstack.sh +++ b/tools/perf/tests/shell/test_brstack.sh @@ -30,14 +30,14 @@ test_user_branches() { # brstack_foo+0x14/brstack_bar+0x40/P/-/-/0/CALL
set -x - grep -E -m1 "^brstack_bench\+[^ ]*/brstack_foo\+[^ ]*/IND_CALL$" $TMPDIR/perf.script - grep -E -m1 "^brstack_foo\+[^ ]*/brstack_bar\+[^ ]*/CALL$" $TMPDIR/perf.script - grep -E -m1 "^brstack_bench\+[^ ]*/brstack_foo\+[^ ]*/CALL$" $TMPDIR/perf.script - grep -E -m1 "^brstack_bench\+[^ ]*/brstack_bar\+[^ ]*/CALL$" $TMPDIR/perf.script - grep -E -m1 "^brstack_bar\+[^ ]*/brstack_foo\+[^ ]*/RET$" $TMPDIR/perf.script - grep -E -m1 "^brstack_foo\+[^ ]*/brstack_bench\+[^ ]*/RET$" $TMPDIR/perf.script - grep -E -m1 "^brstack_bench\+[^ ]*/brstack_bench\+[^ ]*/COND$" $TMPDIR/perf.script - grep -E -m1 "^brstack\+[^ ]*/brstack\+[^ ]*/UNCOND$" $TMPDIR/perf.script + grep -E -m1 "^brstack_bench\+[^ ]*/brstack_foo\+[^ ]*/IND_CALL/.*$" $TMPDIR/perf.script + grep -E -m1 "^brstack_foo\+[^ ]*/brstack_bar\+[^ ]*/CALL/.*$" $TMPDIR/perf.script + grep -E -m1 "^brstack_bench\+[^ ]*/brstack_foo\+[^ ]*/CALL/.*$" $TMPDIR/perf.script + grep -E -m1 "^brstack_bench\+[^ ]*/brstack_bar\+[^ ]*/CALL/.*$" $TMPDIR/perf.script + grep -E -m1 "^brstack_bar\+[^ ]*/brstack_foo\+[^ ]*/RET/.*$" $TMPDIR/perf.script + grep -E -m1 "^brstack_foo\+[^ ]*/brstack_bench\+[^ ]*/RET/.*$" $TMPDIR/perf.script + grep -E -m1 "^brstack_bench\+[^ ]*/brstack_bench\+[^ ]*/COND/.*$" $TMPDIR/perf.script + grep -E -m1 "^brstack\+[^ ]*/brstack\+[^ ]*/UNCOND/.*$" $TMPDIR/perf.script set +x
# some branch types are still not being tested: @@ -57,7 +57,7 @@ test_filter() {
# fail if we find any branch type that doesn't match any of the expected ones # also consider UNKNOWN branch types (-) - if grep -E -vm1 "^[^ ]*/($expect|-|( *))$" $TMPDIR/perf.script; then + if grep -E -vm1 "^[^ ]*/($expect|-|( *))/.*$" $TMPDIR/perf.script; then return 1 fi }
- Sandipan
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