[tip:perf/core] perf test: Add test cases for new data source encoding

tip-bot for Andi Kleen
2017-08-24T08:26:12Z

Commit-ID: 3067eaa7ce2dbcde89d87277cdbc91c211480060
Gitweb: http://git.kernel.org/tip/3067eaa7ce2dbcde89d87277cdbc91c211480060
Author: Andi Kleen <ak@linux.intel.com>
AuthorDate: Wed, 16 Aug 2017 15:21:56 -0700
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Tue, 22 Aug 2017 13:23:10 -0300

perf test: Add test cases for new data source encoding

Add some simple tests to perf test to test data source printing.

v2: Make the tests actually checked for the correct name of Forward
v3: Adjust to new encoding

Committer notes:

Avoid the in place declaration to make this build with older compilers,
for instance, in Debian 7 we get:

tests/mem.c: In function 'test__mem':
tests/mem.c:30:5: error: missing initializer [-Werror=missing-field-initializers]
tests/mem.c:30:5: error: (near initialization for '(anonymous).<anonymous>.mem_snoop') [-Werror=missing-field-initializers]

So just zero a struct, then go on building the unions as needed,
reusing settings from the previous test, i.e. local -> remote, etc.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20170816222156.19953-5-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/tests/Build | 1 +
tools/perf/tests/builtin-test.c | 4 +++
tools/perf/tests/mem.c | 56 +++++++++++++++++++++++++++++++++++++++++
tools/perf/tests/tests.h | 1 +
4 files changed, 62 insertions(+)

diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build
index 84222bd..87bf3ed 100644
--- a/tools/perf/tests/Build
+++ b/tools/perf/tests/Build
@@ -34,6 +34,7 @@ perf-y += thread-map.o
perf-y += llvm.o llvm-src-base.o llvm-src-kbuild.o llvm-src-prologue.o llvm-src-relocation.o
perf-y += bpf.o
perf-y += topology.o
+perf-y += mem.o
perf-y += cpumap.o
perf-y += stat.o
perf-y += event_update.o
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 9ecc44e..377bea0 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -48,6 +48,10 @@ static struct test generic_tests[] = {
.func = test__basic_mmap,
},
{
+ .desc = "Test data source output",
+ .func = test__mem,
+ },
+ {
.desc = "Parse event definition strings",
.func = test__parse_events,
},
diff --git a/tools/perf/tests/mem.c b/tools/perf/tests/mem.c
new file mode 100644
index 0000000..21952e1
--- /dev/null
+++ b/tools/perf/tests/mem.c
@@ -0,0 +1,56 @@
+#include "util/mem-events.h"
+#include "util/symbol.h"
+#include "linux/perf_event.h"
+#include "util/debug.h"
+#include "tests.h"
+#include <string.h>
+
+static int check(union perf_mem_data_src data_src,
+ const char *string)
+{
+ char out[100];
+ char failure[100];
+ struct mem_info mi = { .data_src = data_src };
+
+ int n;
+
+ n = perf_mem__snp_scnprintf(out, sizeof out, &mi);
+ n += perf_mem__lvl_scnprintf(out + n, sizeof out - n, &mi);
+ snprintf(failure, sizeof failure, "unexpected %s", out);
+ TEST_ASSERT_VAL(failure, !strcmp(string, out));
+ return 0;
+}
+
+int test__mem(struct test *text __maybe_unused, int subtest __maybe_unused)
+{
+ int ret = 0;
+ union perf_mem_data_src src;
+
+ memset(&src, 0, sizeof(src));
+
+ src.mem_lvl = PERF_MEM_LVL_HIT;
+ src.mem_lvl_num = 4;
+
+ ret |= check(src, "N/AL4 hit");
+
+ src.mem_remote = 1;
+
+ ret |= check(src, "N/ARemote L4 hit");
+
+ src.mem_lvl = PERF_MEM_LVL_MISS;
+ src.mem_lvl_num = PERF_MEM_LVLNUM_PMEM;
+ src.mem_remote = 0;
+
+ ret |= check(src, "N/APMEM miss");
+
+ src.mem_remote = 1;
+
+ ret |= check(src, "N/ARemote PMEM miss");
+
+ src.mem_snoopx = PERF_MEM_SNOOPX_FWD;
+ src.mem_lvl_num = PERF_MEM_LVLNUM_RAM;
+
+ ret |= check(src , "FwdRemote RAM miss");
+
+ return ret;
+}
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index c46ae81..921412a 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -58,6 +58,7 @@ int test__python_use(struct test *test, int subtest);
int test__bp_signal(struct test *test, int subtest);
int test__bp_signal_overflow(struct test *test, int subtest);
int test__task_exit(struct test *test, int subtest);
+int test__mem(struct test *test, int subtest);
int test__sw_clock_freq(struct test *test, int subtest);
int test__code_reading(struct test *test, int subtest);
int test__sample_parsing(struct test *test, int subtest);