perf test: Add dso data caching tests

Adding automated test for DSO data reading. Testing raw/cached reads
from different file/cache locations.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Arun Sharma <asharma@fb.com>
Cc: Benjamin Redelings <benjamin.redelings@nescent.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
Cc: Ulrich Drepper <drepper@gmail.com>
Link: http://lkml.kernel.org/r/1342959280-5361-18-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 75d74e5..e8f0579 100644 (file)
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -354,6 +354,7 @@ LIB_OBJS += $(OUTPUT)util/usage.o
 LIB_OBJS += $(OUTPUT)util/wrapper.o
 LIB_OBJS += $(OUTPUT)util/sigchain.o
 LIB_OBJS += $(OUTPUT)util/symbol.o
+LIB_OBJS += $(OUTPUT)util/dso-test-data.o
 LIB_OBJS += $(OUTPUT)util/color.o
 LIB_OBJS += $(OUTPUT)util/pager.o
 LIB_OBJS += $(OUTPUT)util/header.o

diff --git a/tools/perf/builtin-test.c b/tools/perf/builtin-test.c
index 5ce3030..d909eb7 100644 (file)
--- a/tools/perf/builtin-test.c
+++ b/tools/perf/builtin-test.c
@@ -1142,6 +1142,10 @@ static struct test {
                .func = test__perf_pmu,
        },
        {
+               .desc = "Test dso data interface",
+               .func = dso__test_data,
+       },
+       {
                .func = NULL,
        },
 };

diff --git a/tools/perf/util/dso-test-data.c b/tools/perf/util/dso-test-data.c
new file mode 100644 (file)
index 0000000..541cdc7
--- /dev/null
+++ b/tools/perf/util/dso-test-data.c
@@ -0,0 +1,153 @@
+#include "util.h"
+
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <string.h>
+
+#include "symbol.h"
+
+#define TEST_ASSERT_VAL(text, cond) \
+do { \
+       if (!(cond)) { \
+               pr_debug("FAILED %s:%d %s\n", __FILE__, __LINE__, text); \
+               return -1; \
+       } \
+} while (0)
+
+static char *test_file(int size)
+{
+       static char buf_templ[] = "/tmp/test-XXXXXX";
+       char *templ = buf_templ;
+       int fd, i;
+       unsigned char *buf;
+
+       fd = mkostemp(templ, O_CREAT|O_WRONLY|O_TRUNC);
+
+       buf = malloc(size);
+       if (!buf) {
+               close(fd);
+               return NULL;
+       }
+
+       for (i = 0; i < size; i++)
+               buf[i] = (unsigned char) ((int) i % 10);
+
+       if (size != write(fd, buf, size))
+               templ = NULL;
+
+       close(fd);
+       return templ;
+}
+
+#define TEST_FILE_SIZE (DSO__DATA_CACHE_SIZE * 20)
+
+struct test_data_offset {
+       off_t offset;
+       u8 data[10];
+       int size;
+};
+
+struct test_data_offset offsets[] = {
+       /* Fill first cache page. */
+       {
+               .offset = 10,
+               .data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
+               .size   = 10,
+       },
+       /* Read first cache page. */
+       {
+               .offset = 10,
+               .data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
+               .size   = 10,
+       },
+       /* Fill cache boundary pages. */
+       {
+               .offset = DSO__DATA_CACHE_SIZE - DSO__DATA_CACHE_SIZE % 10,
+               .data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
+               .size   = 10,
+       },
+       /* Read cache boundary pages. */
+       {
+               .offset = DSO__DATA_CACHE_SIZE - DSO__DATA_CACHE_SIZE % 10,
+               .data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
+               .size   = 10,
+       },
+       /* Fill final cache page. */
+       {
+               .offset = TEST_FILE_SIZE - 10,
+               .data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
+               .size   = 10,
+       },
+       /* Read final cache page. */
+       {
+               .offset = TEST_FILE_SIZE - 10,
+               .data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
+               .size   = 10,
+       },
+       /* Read final cache page. */
+       {
+               .offset = TEST_FILE_SIZE - 3,
+               .data   = { 7, 8, 9, 0, 0, 0, 0, 0, 0, 0 },
+               .size   = 3,
+       },
+};
+
+int dso__test_data(void)
+{
+       struct machine machine;
+       struct dso *dso;
+       char *file = test_file(TEST_FILE_SIZE);
+       size_t i;
+
+       TEST_ASSERT_VAL("No test file", file);
+
+       memset(&machine, 0, sizeof(machine));
+
+       dso = dso__new((const char *)file);
+
+       /* Basic 10 bytes tests. */
+       for (i = 0; i < ARRAY_SIZE(offsets); i++) {
+               struct test_data_offset *data = &offsets[i];
+               ssize_t size;
+               u8 buf[10];
+
+               memset(buf, 0, 10);
+               size = dso__data_read_offset(dso, &machine, data->offset,
+                                    buf, 10);
+
+               TEST_ASSERT_VAL("Wrong size", size == data->size);
+               TEST_ASSERT_VAL("Wrong data", !memcmp(buf, data->data, 10));
+       }
+
+       /* Read cross multiple cache pages. */
+       {
+               ssize_t size;
+               int c;
+               u8 *buf;
+
+               buf = malloc(TEST_FILE_SIZE);
+               TEST_ASSERT_VAL("ENOMEM\n", buf);
+
+               /* First iteration to fill caches, second one to read them. */
+               for (c = 0; c < 2; c++) {
+                       memset(buf, 0, TEST_FILE_SIZE);
+                       size = dso__data_read_offset(dso, &machine, 10,
+                                                    buf, TEST_FILE_SIZE);
+
+                       TEST_ASSERT_VAL("Wrong size",
+                               size == (TEST_FILE_SIZE - 10));
+
+                       for (i = 0; i < (size_t)size; i++)
+                               TEST_ASSERT_VAL("Wrong data",
+                                       buf[i] == (i % 10));
+               }
+
+               free(buf);
+       }
+
+       dso__delete(dso);
+       unlink(file);
+       return 0;
+}

diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 980d5f5..1fe733a 100644 (file)
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -325,4 +325,5 @@ ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
 ssize_t dso__data_read_addr(struct dso *dso, struct map *map,
                            struct machine *machine, u64 addr,
                            u8 *data, ssize_t size);
+int dso__test_data(void);
 #endif /* __PERF_SYMBOL */