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Message-Id: <1374064994-17810-15-git-send-email-adrian.hunter@intel.com>
Date: Wed, 17 Jul 2013 15:43:14 +0300
From: Adrian Hunter <adrian.hunter@...el.com>
To: Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc: linux-kernel@...r.kernel.org, David Ahern <dsahern@...il.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Jiri Olsa <jolsa@...hat.com>, Mike Galbraith <efault@....de>,
Namhyung Kim <namhyung@...il.com>,
Paul Mackerras <paulus@...ba.org>,
Peter Zijlstra <peterz@...radead.org>,
Stephane Eranian <eranian@...gle.com>,
Ingo Molnar <mingo@...nel.org>,
Adrian Hunter <adrian.hunter@...el.com>
Subject: [PATCH V7 14/14] perf tools: add a sample parsing test
Add a test that checks that sample parsing is correctly
implemented.
Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
---
tools/perf/Makefile | 1 +
tools/perf/tests/builtin-test.c | 4 +
tools/perf/tests/sample-parsing.c | 263 ++++++++++++++++++++++++++++++++++++++
tools/perf/tests/tests.h | 1 +
4 files changed, 269 insertions(+)
create mode 100644 tools/perf/tests/sample-parsing.c
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 5b7c6db..fe20130 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -389,6 +389,7 @@ LIB_OBJS += $(OUTPUT)tests/bp_signal.o
LIB_OBJS += $(OUTPUT)tests/bp_signal_overflow.o
LIB_OBJS += $(OUTPUT)tests/task-exit.o
LIB_OBJS += $(OUTPUT)tests/sw-clock.o
+LIB_OBJS += $(OUTPUT)tests/sample-parsing.o
BUILTIN_OBJS += $(OUTPUT)builtin-annotate.o
BUILTIN_OBJS += $(OUTPUT)builtin-bench.o
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 35b45f1466..5ee3933 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -94,6 +94,10 @@ static struct test {
.func = test__sw_clock_freq,
},
{
+ .desc = "Test sample parsing",
+ .func = test__sample_parsing,
+ },
+ {
.func = NULL,
},
};
diff --git a/tools/perf/tests/sample-parsing.c b/tools/perf/tests/sample-parsing.c
new file mode 100644
index 0000000..8452686
--- /dev/null
+++ b/tools/perf/tests/sample-parsing.c
@@ -0,0 +1,263 @@
+#include <stdbool.h>
+#include <inttypes.h>
+
+#include "event.h"
+#include "evsel.h"
+
+#include "tests.h"
+
+#define COMP(m) { \
+ while (s1->m != s2->m) { \
+ pr_debug("Samples differ at '"#m"'\n"); \
+ return false; \
+ } \
+}
+
+#define MCOMP(m) { \
+ while (memcmp(&s1->m, &s2->m, sizeof(s1->m))) { \
+ pr_debug("Samples differ at '"#m"'\n"); \
+ return false; \
+ } \
+}
+
+static bool samples_same(const struct perf_sample *s1,
+ const struct perf_sample *s2, u64 type, u64 regs_user)
+{
+ size_t i;
+
+ if (type & PERF_SAMPLE_IDENTIFIER)
+ COMP(id);
+
+ if (type & PERF_SAMPLE_IP)
+ COMP(ip);
+
+ if (type & PERF_SAMPLE_TID) {
+ COMP(pid);
+ COMP(tid);
+ }
+
+ if (type & PERF_SAMPLE_TIME)
+ COMP(time);
+
+ if (type & PERF_SAMPLE_ADDR)
+ COMP(addr);
+
+ if (type & PERF_SAMPLE_ID)
+ COMP(id);
+
+ if (type & PERF_SAMPLE_STREAM_ID)
+ COMP(stream_id);
+
+ if (type & PERF_SAMPLE_CPU)
+ COMP(cpu);
+
+ if (type & PERF_SAMPLE_PERIOD)
+ COMP(period);
+
+ if (type & PERF_SAMPLE_CALLCHAIN) {
+ COMP(callchain->nr);
+ for (i = 0; i < s1->callchain->nr; i++)
+ COMP(callchain->ips[i]);
+ }
+
+ if (type & PERF_SAMPLE_RAW) {
+ COMP(raw_size);
+ if (memcmp(s1->raw_data, s2->raw_data, s1->raw_size)) {
+ pr_debug("Samples differ at 'raw_data'\n");
+ return false;
+ }
+ }
+
+ if (type & PERF_SAMPLE_BRANCH_STACK) {
+ COMP(branch_stack->nr);
+ for (i = 0; i < s1->branch_stack->nr; i++)
+ MCOMP(branch_stack->entries[i]);
+ }
+
+ if (type & PERF_SAMPLE_REGS_USER) {
+ size_t sz = hweight_long(regs_user) * sizeof(u64);
+
+ if ((sz && (!s1->user_regs.regs || !s2->user_regs.regs)) ||
+ memcmp(s1->user_regs.regs, s2->user_regs.regs, sz)) {
+ pr_debug("Samples differ at 'user_regs'\n");
+ return false;
+ }
+ }
+
+ if (type & PERF_SAMPLE_STACK_USER) {
+ COMP(user_stack.size);
+ if (memcmp(s1->user_stack.data, s1->user_stack.data,
+ s1->user_stack.size)) {
+ pr_debug("Samples differ at 'user_stack'\n");
+ return false;
+ }
+ }
+
+ if (type & PERF_SAMPLE_WEIGHT)
+ COMP(weight);
+
+ if (type & PERF_SAMPLE_DATA_SRC)
+ COMP(data_src);
+
+ return true;
+}
+
+static int do_test(u64 sample_type, u64 sample_regs_user)
+{
+ struct perf_evsel evsel = {
+ .needs_swap = false,
+ .attr = {
+ .sample_type = sample_type,
+ .sample_regs_user = sample_regs_user,
+ },
+ };
+ union perf_event *event;
+ union {
+ struct ip_callchain callchain;
+ u64 data[64];
+ } callchain = {
+ /* 3 ips */
+ .data = {3, 201, 202, 203},
+ };
+ union {
+ struct branch_stack branch_stack;
+ u64 data[64];
+ } branch_stack = {
+ /* 1 branch_entry */
+ .data = {1, 211, 212, 213},
+ };
+ u64 user_regs[64];
+ const u64 raw_data[] = {0x123456780a0b0c0dULL, 0x1102030405060708ULL};
+ const u64 data[] = {0x2211443366558877ULL, 0, 0xaabbccddeeff4321ULL};
+ const struct perf_sample sample = {
+ .ip = 101,
+ .pid = 102,
+ .tid = 103,
+ .time = 104,
+ .addr = 105,
+ .id = 106,
+ .stream_id = 107,
+ .period = 108,
+ .weight = 109,
+ .cpu = 110,
+ .raw_size = sizeof(raw_data),
+ .data_src = 111,
+ .raw_data = (void *)raw_data,
+ .callchain = &callchain.callchain,
+ .branch_stack = &branch_stack.branch_stack,
+ .user_regs = {
+ .regs = user_regs,
+ },
+ .user_stack = {
+ .size = sizeof(data),
+ .data = (void *)data,
+ },
+ };
+ struct perf_sample sample_out;
+ size_t i, sz, bufsz;
+ int err, ret = -1;
+
+ for (i = 0; i < sizeof(user_regs); i++)
+ *(i + (u8 *)user_regs) = i & 0xfe;
+
+ sz = perf_event__sample_event_size(&sample, sample_type,
+ sample_regs_user);
+ bufsz = sz + 4096; /* Add a bit for overrun checking */
+ event = malloc(bufsz);
+ if (!event) {
+ pr_debug("malloc failed\n");
+ return -1;
+ }
+
+ memset(event, 0xff, bufsz);
+ event->header.type = PERF_RECORD_SAMPLE;
+ event->header.misc = 0;
+ event->header.size = sz;
+
+ err = perf_event__synthesize_sample(event, sample_type,
+ sample_regs_user, &sample, false);
+ if (err) {
+ pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
+ "perf_event__synthesize_sample", sample_type, err);
+ goto out_free;
+ }
+
+ /* The data does not contain 0xff so we use that to check the size */
+ for (i = bufsz; i > 0; i--) {
+ if (*(i - 1 + (u8 *)event) != 0xff)
+ break;
+ }
+ if (i != sz) {
+ pr_debug("Event size mismatch: actual %zu vs expected %zu\n",
+ i, sz);
+ goto out_free;
+ }
+
+ evsel.sample_size = __perf_evsel__sample_size(sample_type);
+
+ err = perf_evsel__parse_sample(&evsel, event, &sample_out);
+ if (err) {
+ pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
+ "perf_evsel__parse_sample", sample_type, err);
+ goto out_free;
+ }
+
+ if (!samples_same(&sample, &sample_out, sample_type,
+ sample_regs_user)) {
+ pr_debug("parsing failed for sample_type %#"PRIx64"\n",
+ sample_type);
+ goto out_free;
+ }
+
+ ret = 0;
+out_free:
+ free(event);
+ return ret;
+}
+
+/**
+ * test__sample_parsing - test sample parsing.
+ *
+ * This function implements a test that synthesizes a sample event, parses it
+ * and then checks that the parsed sample matches the original sample. The test
+ * checks sample format bits separately and together. If the test passes %0 is
+ * returned, otherwise %-1 is returned.
+ */
+int test__sample_parsing(void)
+{
+ u64 sample_type;
+ u64 sample_regs_user;
+ int err;
+
+ /*
+ * Fail the test if it has not been updated when new sample format bits
+ * were added.
+ */
+ if (PERF_SAMPLE_MAX > PERF_SAMPLE_IDENTIFIER << 1) {
+ pr_debug("sample format has changed - test needs updating\n");
+ return -1;
+ }
+
+ /* Test each sample format bit separately */
+ for (sample_type = 1; sample_type != PERF_SAMPLE_MAX;
+ sample_type <<= 1) {
+ if (sample_type == PERF_SAMPLE_READ)
+ continue;
+ if (sample_type == PERF_SAMPLE_REGS_USER)
+ sample_regs_user = 0x3fff;
+ else
+ sample_regs_user = 0;
+ err = do_test(sample_type, sample_regs_user);
+ if (err)
+ return err;
+ }
+
+ /* Test all sample format bits together */
+ sample_type = (PERF_SAMPLE_MAX - 1) & (~PERF_SAMPLE_READ);
+ sample_regs_user = 0x3fff;
+ err = do_test(sample_type, sample_regs_user);
+ if (err)
+ return err;
+
+ return 0;
+}
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index 07a92f9..90e3056 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -35,5 +35,6 @@ int test__bp_signal(void);
int test__bp_signal_overflow(void);
int test__task_exit(void);
int test__sw_clock_freq(void);
+int test__sample_parsing(void);
#endif /* TESTS_H */
--
1.7.11.7
--
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