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perf/tests: Add interrupted state sample parsing test

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This patch updates the sample parsing test with support
for the sampling of machine interrupted state.

The patch modifies the do_test() code to sahred the sample
regts bitmask between user and intr regs.

Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: cebbert.lkml@gmail.com
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Borislav Petkov <bp@suse.de>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Link: http://lkml.kernel.org/r/1411559322-16548-5-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Stephane Eranian 2014-09-24 13:48:40 +02:00 committed by Ingo Molnar
parent 6a21c0b5c2
commit 26ff0f0af7
1 changed files with 40 additions and 15 deletions
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55
tools/perf/tests/sample-parsing.c
View file

@ -126,16 +126,28 @@ static bool samples_same(const struct perf_sample *s1,
if (type & PERF_SAMPLE_TRANSACTION)
COMP(transaction);
if (type & PERF_SAMPLE_REGS_INTR) {
size_t sz = hweight_long(s1->intr_regs.mask) * sizeof(u64);
COMP(intr_regs.mask);
COMP(intr_regs.abi);
if (s1->intr_regs.abi &&
(!s1->intr_regs.regs || !s2->intr_regs.regs ||
memcmp(s1->intr_regs.regs, s2->intr_regs.regs, sz))) {
pr_debug("Samples differ at 'intr_regs'\n");
return false;
}
}
return true;
}
static int do_test(u64 sample_type, u64 sample_regs_user, u64 read_format)
static int do_test(u64 sample_type, u64 sample_regs, u64 read_format)
{
struct perf_evsel evsel = {
.needs_swap = false,
.attr = {
.sample_type = sample_type,
.sample_regs_user = sample_regs_user,
.read_format = read_format,
},
};
@ -154,7 +166,7 @@ static int do_test(u64 sample_type, u64 sample_regs_user, u64 read_format)
/* 1 branch_entry */
.data = {1, 211, 212, 213},
};
u64 user_regs[64];
u64 regs[64];
const u64 raw_data[] = {0x123456780a0b0c0dULL, 0x1102030405060708ULL};
const u64 data[] = {0x2211443366558877ULL, 0, 0xaabbccddeeff4321ULL};
struct perf_sample sample = {
@ -176,8 +188,8 @@ static int do_test(u64 sample_type, u64 sample_regs_user, u64 read_format)
.branch_stack = &branch_stack.branch_stack,
.user_regs = {
.abi = PERF_SAMPLE_REGS_ABI_64,
.mask = sample_regs_user,
.regs = user_regs,
.mask = sample_regs,
.regs = regs,
},
.user_stack = {
.size = sizeof(data),
@ -187,14 +199,25 @@ static int do_test(u64 sample_type, u64 sample_regs_user, u64 read_format)
.time_enabled = 0x030a59d664fca7deULL,
.time_running = 0x011b6ae553eb98edULL,
},
.intr_regs = {
.abi = PERF_SAMPLE_REGS_ABI_64,
.mask = sample_regs,
.regs = regs,
},
};
struct sample_read_value values[] = {{1, 5}, {9, 3}, {2, 7}, {6, 4},};
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;
if (sample_type & PERF_SAMPLE_REGS_USER)
evsel.attr.sample_regs_user = sample_regs;
if (sample_type & PERF_SAMPLE_REGS_INTR)
evsel.attr.sample_regs_intr = sample_regs;
for (i = 0; i < sizeof(regs); i++)
*(i + (u8 *)regs) = i & 0xfe;
if (read_format & PERF_FORMAT_GROUP) {
sample.read.group.nr = 4;
@ -271,7 +294,7 @@ int test__sample_parsing(void)
{
const u64 rf[] = {4, 5, 6, 7, 12, 13, 14, 15};
u64 sample_type;
u64 sample_regs_user;
u64 sample_regs;
size_t i;
int err;
@ -280,7 +303,7 @@ int test__sample_parsing(void)
* were added. Please actually update the test rather than just change
* the condition below.
*/
if (PERF_SAMPLE_MAX > PERF_SAMPLE_TRANSACTION << 1) {
if (PERF_SAMPLE_MAX > PERF_SAMPLE_REGS_INTR << 1) {
pr_debug("sample format has changed, some new PERF_SAMPLE_ bit was introduced - test needs updating\n");
return -1;
}
@ -297,22 +320,24 @@ int test__sample_parsing(void)
}
continue;
}
sample_regs = 0;
if (sample_type == PERF_SAMPLE_REGS_USER)
sample_regs_user = 0x3fff;
else
sample_regs_user = 0;
sample_regs = 0x3fff;
err = do_test(sample_type, sample_regs_user, 0);
if (sample_type == PERF_SAMPLE_REGS_INTR)
sample_regs = 0xff0fff;
err = do_test(sample_type, sample_regs, 0);
if (err)
return err;
}
/* Test all sample format bits together */
sample_type = PERF_SAMPLE_MAX - 1;
sample_regs_user = 0x3fff;
sample_regs = 0x3fff; /* shared yb intr and user regs */
for (i = 0; i < ARRAY_SIZE(rf); i++) {
err = do_test(sample_type, sample_regs_user, rf[i]);
err = do_test(sample_type, sample_regs, rf[i]);
if (err)
return err;
}