diff mbox series

[v5,3/6] perf test: Add a test for the new Arm CPU ID comparison behavior

Message ID 20230811144017.491628-4-james.clark@arm.com (mailing list archive)
State New, archived
Headers show
Series perf vendor events arm64: Update N2 and V2 metrics and events using Arm telemetry repo | expand

Commit Message

James Clark Aug. 11, 2023, 2:39 p.m. UTC 
Now that variant and revision fields are taken into account the behavior
is slightly more complicated so add a test to ensure that this behaves
as expected.

Signed-off-by: James Clark <james.clark@arm.com>
---
 tools/perf/arch/arm64/include/arch-tests.h |  3 ++
 tools/perf/arch/arm64/tests/Build          |  1 +
 tools/perf/arch/arm64/tests/arch-tests.c   |  4 +++
 tools/perf/arch/arm64/tests/cpuid-match.c  | 38 ++++++++++++++++++++++
 4 files changed, 46 insertions(+)
 create mode 100644 tools/perf/arch/arm64/tests/cpuid-match.c

Comments

John Garry Aug. 15, 2023, 9:47 a.m. UTC | #1 
On 11/08/2023 15:39, James Clark wrote:
> Now that variant and revision fields are taken into account the behavior
> is slightly more complicated so add a test to ensure that this behaves
> as expected.
> 
> Signed-off-by: James Clark <james.clark@arm.com>
> ---
>   tools/perf/arch/arm64/include/arch-tests.h |  3 ++
>   tools/perf/arch/arm64/tests/Build          |  1 +
>   tools/perf/arch/arm64/tests/arch-tests.c   |  4 +++
>   tools/perf/arch/arm64/tests/cpuid-match.c  | 38 ++++++++++++++++++++++
>   4 files changed, 46 insertions(+)
>   create mode 100644 tools/perf/arch/arm64/tests/cpuid-match.c
> 
> diff --git a/tools/perf/arch/arm64/include/arch-tests.h b/tools/perf/arch/arm64/include/arch-tests.h
> index 452b3d904521..474d7cf5afbd 100644
> --- a/tools/perf/arch/arm64/include/arch-tests.h
> +++ b/tools/perf/arch/arm64/include/arch-tests.h
> @@ -2,6 +2,9 @@
>   #ifndef ARCH_TESTS_H
>   #define ARCH_TESTS_H
>   
> +struct test_suite;
> +
> +int test__cpuid_match(struct test_suite *test, int subtest);
>   extern struct test_suite *arch_tests[];
>   
>   #endif
> diff --git a/tools/perf/arch/arm64/tests/Build b/tools/perf/arch/arm64/tests/Build
> index a61c06bdb757..e337c09e7f56 100644
> --- a/tools/perf/arch/arm64/tests/Build
> +++ b/tools/perf/arch/arm64/tests/Build
> @@ -2,3 +2,4 @@ perf-y += regs_load.o
>   perf-$(CONFIG_DWARF_UNWIND) += dwarf-unwind.o
>   
>   perf-y += arch-tests.o
> +perf-y += cpuid-match.o
> diff --git a/tools/perf/arch/arm64/tests/arch-tests.c b/tools/perf/arch/arm64/tests/arch-tests.c
> index ad16b4f8f63e..74932e72c727 100644
> --- a/tools/perf/arch/arm64/tests/arch-tests.c
> +++ b/tools/perf/arch/arm64/tests/arch-tests.c
> @@ -3,9 +3,13 @@
>   #include "tests/tests.h"
>   #include "arch-tests.h"
>   
> +
> +DEFINE_SUITE("arm64 CPUID matching", cpuid_match);
> +
>   struct test_suite *arch_tests[] = {
>   #ifdef HAVE_DWARF_UNWIND_SUPPORT
>   	&suite__dwarf_unwind,
>   #endif
> +	&suite__cpuid_match,
>   	NULL,
>   };
> diff --git a/tools/perf/arch/arm64/tests/cpuid-match.c b/tools/perf/arch/arm64/tests/cpuid-match.c
> new file mode 100644
> index 000000000000..af0871b54ae7
> --- /dev/null
> +++ b/tools/perf/arch/arm64/tests/cpuid-match.c
> @@ -0,0 +1,38 @@
> +// SPDX-License-Identifier: GPL-2.0
> +#include <linux/compiler.h>
> +
> +#include "arch-tests.h"
> +#include "tests/tests.h"
> +#include "util/header.h"
> +
> +int test__cpuid_match(struct test_suite *test __maybe_unused,
> +			     int subtest __maybe_unused)
> +{
> +	/* midr with no leading zeros matches */
> +	if (strcmp_cpuid_str("0x410fd0c0", "0x00000000410fd0c0"))
> +		return -1;
> +	/* Upper case matches */
> +	if (strcmp_cpuid_str("0x410fd0c0", "0x00000000410FD0C0"))
> +		return -1;
> +	/* r0p0 = r0p0 matches */
> +	if (strcmp_cpuid_str("0x00000000410fd480", "0x00000000410fd480"))
> +		return -1;
> +	/* r0p1 > r0p0 matches */
> +	if (strcmp_cpuid_str("0x00000000410fd480", "0x00000000410fd481"))
> +		return -1;
> +	/* r1p0 > r0p0 matches*/
> +	if (strcmp_cpuid_str("0x00000000410fd480", "0x00000000411fd480"))
> +		return -1;
> +	/* r0p0 < r0p1 doesn't match */
> +	if (!strcmp_cpuid_str("0x00000000410fd481", "0x00000000410fd480"))
> +		return -1;
> +	/* r0p0 < r1p0 doesn't match */
> +	if (!strcmp_cpuid_str("0x00000000411fd480", "0x00000000410fd480"))
> +		return -1;
> +	/* Different CPU doesn't match */
> +	if (!strcmp_cpuid_str("0x00000000410fd4c0", "0x00000000430f0af0"))
> +		return -1;
> +
> +	return 0;
> +}
> +

Would it be possible to put this in core test code, since x86 also 
supports strcmp_cpuid_str()?

Maybe we would have an structure per arch of cpuids and expected 
results, like

struct cpuid_match {
	char *cpuid1;
	char *cpuid1;
	int expected_result;
};


#ifdef ARM64
  cpuid_match_array[] = {
	{"0x410fd0c0", "0x00000000410FD0C0", -1},
	{"0x00000000410fd480", "0x00000000410fd480", -1},
	...
	{} /* sentinel */

};
#else if defined(X86)
  cpuid_match_array[] = {
	{....}
	...
	{} /* sentinel */

};
#else
/* no support */
#endif

Thanks,
John
James Clark Aug. 16, 2023, 9:14 a.m. UTC | #2 
On 15/08/2023 10:47, John Garry wrote:
> On 11/08/2023 15:39, James Clark wrote:
>> Now that variant and revision fields are taken into account the behavior
>> is slightly more complicated so add a test to ensure that this behaves
>> as expected.
>>
>> Signed-off-by: James Clark <james.clark@arm.com>
>> ---
>>   tools/perf/arch/arm64/include/arch-tests.h |  3 ++
>>   tools/perf/arch/arm64/tests/Build          |  1 +
>>   tools/perf/arch/arm64/tests/arch-tests.c   |  4 +++
>>   tools/perf/arch/arm64/tests/cpuid-match.c  | 38 ++++++++++++++++++++++
>>   4 files changed, 46 insertions(+)
>>   create mode 100644 tools/perf/arch/arm64/tests/cpuid-match.c
>>
>> diff --git a/tools/perf/arch/arm64/include/arch-tests.h
>> b/tools/perf/arch/arm64/include/arch-tests.h
>> index 452b3d904521..474d7cf5afbd 100644
>> --- a/tools/perf/arch/arm64/include/arch-tests.h
>> +++ b/tools/perf/arch/arm64/include/arch-tests.h
>> @@ -2,6 +2,9 @@
>>   #ifndef ARCH_TESTS_H
>>   #define ARCH_TESTS_H
>>   +struct test_suite;
>> +
>> +int test__cpuid_match(struct test_suite *test, int subtest);
>>   extern struct test_suite *arch_tests[];
>>     #endif
>> diff --git a/tools/perf/arch/arm64/tests/Build
>> b/tools/perf/arch/arm64/tests/Build
>> index a61c06bdb757..e337c09e7f56 100644
>> --- a/tools/perf/arch/arm64/tests/Build
>> +++ b/tools/perf/arch/arm64/tests/Build
>> @@ -2,3 +2,4 @@ perf-y += regs_load.o
>>   perf-$(CONFIG_DWARF_UNWIND) += dwarf-unwind.o
>>     perf-y += arch-tests.o
>> +perf-y += cpuid-match.o
>> diff --git a/tools/perf/arch/arm64/tests/arch-tests.c
>> b/tools/perf/arch/arm64/tests/arch-tests.c
>> index ad16b4f8f63e..74932e72c727 100644
>> --- a/tools/perf/arch/arm64/tests/arch-tests.c
>> +++ b/tools/perf/arch/arm64/tests/arch-tests.c
>> @@ -3,9 +3,13 @@
>>   #include "tests/tests.h"
>>   #include "arch-tests.h"
>>   +
>> +DEFINE_SUITE("arm64 CPUID matching", cpuid_match);
>> +
>>   struct test_suite *arch_tests[] = {
>>   #ifdef HAVE_DWARF_UNWIND_SUPPORT
>>       &suite__dwarf_unwind,
>>   #endif
>> +    &suite__cpuid_match,
>>       NULL,
>>   };
>> diff --git a/tools/perf/arch/arm64/tests/cpuid-match.c
>> b/tools/perf/arch/arm64/tests/cpuid-match.c
>> new file mode 100644
>> index 000000000000..af0871b54ae7
>> --- /dev/null
>> +++ b/tools/perf/arch/arm64/tests/cpuid-match.c
>> @@ -0,0 +1,38 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +#include <linux/compiler.h>
>> +
>> +#include "arch-tests.h"
>> +#include "tests/tests.h"
>> +#include "util/header.h"
>> +
>> +int test__cpuid_match(struct test_suite *test __maybe_unused,
>> +                 int subtest __maybe_unused)
>> +{
>> +    /* midr with no leading zeros matches */
>> +    if (strcmp_cpuid_str("0x410fd0c0", "0x00000000410fd0c0"))
>> +        return -1;
>> +    /* Upper case matches */
>> +    if (strcmp_cpuid_str("0x410fd0c0", "0x00000000410FD0C0"))
>> +        return -1;
>> +    /* r0p0 = r0p0 matches */
>> +    if (strcmp_cpuid_str("0x00000000410fd480", "0x00000000410fd480"))
>> +        return -1;
>> +    /* r0p1 > r0p0 matches */
>> +    if (strcmp_cpuid_str("0x00000000410fd480", "0x00000000410fd481"))
>> +        return -1;
>> +    /* r1p0 > r0p0 matches*/
>> +    if (strcmp_cpuid_str("0x00000000410fd480", "0x00000000411fd480"))
>> +        return -1;
>> +    /* r0p0 < r0p1 doesn't match */
>> +    if (!strcmp_cpuid_str("0x00000000410fd481", "0x00000000410fd480"))
>> +        return -1;
>> +    /* r0p0 < r1p0 doesn't match */
>> +    if (!strcmp_cpuid_str("0x00000000411fd480", "0x00000000410fd480"))
>> +        return -1;
>> +    /* Different CPU doesn't match */
>> +    if (!strcmp_cpuid_str("0x00000000410fd4c0", "0x00000000430f0af0"))
>> +        return -1;
>> +
>> +    return 0;
>> +}
>> +
> 
> Would it be possible to put this in core test code, since x86 also
> supports strcmp_cpuid_str()?
> 

That's how I started, but Ian suggested to move it to an arch specific
folder because that's what it was testing.

We could still add test__cpuid_match() in the x86 folder rather than
adding it with #ifdefs, but I don't think it needs to be done here
because I haven't touched the x86 code.

> Maybe we would have an structure per arch of cpuids and expected
> results, like
> 
> struct cpuid_match {
>     char *cpuid1;
>     char *cpuid1;
>     int expected_result;
> };
> 
> 
> #ifdef ARM64
>  cpuid_match_array[] = {
>     {"0x410fd0c0", "0x00000000410FD0C0", -1},
>     {"0x00000000410fd480", "0x00000000410fd480", -1},
>     ...
>     {} /* sentinel */
> 
> };
> #else if defined(X86)
>  cpuid_match_array[] = {
>     {....}
>     ...
>     {} /* sentinel */
> 
> };
> #else
> /* no support */
> #endif
> 
> Thanks,
> John
John Garry Aug. 16, 2023, 10:27 a.m. UTC | #3 
On 16/08/2023 10:14, James Clark wrote:
> 
> 
> On 15/08/2023 10:47, John Garry wrote:
>> On 11/08/2023 15:39, James Clark wrote:
>>> Now that variant and revision fields are taken into account the behavior
>>> is slightly more complicated so add a test to ensure that this behaves
>>> as expected.
>>>
>>> Signed-off-by: James Clark <james.clark@arm.com>
>>> ---
>>>    tools/perf/arch/arm64/include/arch-tests.h |  3 ++
>>>    tools/perf/arch/arm64/tests/Build          |  1 +
>>>    tools/perf/arch/arm64/tests/arch-tests.c   |  4 +++
>>>    tools/perf/arch/arm64/tests/cpuid-match.c  | 38 ++++++++++++++++++++++
>>>    4 files changed, 46 insertions(+)
>>>    create mode 100644 tools/perf/arch/arm64/tests/cpuid-match.c
>>>
>>> diff --git a/tools/perf/arch/arm64/include/arch-tests.h
>>> b/tools/perf/arch/arm64/include/arch-tests.h
>>> index 452b3d904521..474d7cf5afbd 100644
>>> --- a/tools/perf/arch/arm64/include/arch-tests.h
>>> +++ b/tools/perf/arch/arm64/include/arch-tests.h
>>> @@ -2,6 +2,9 @@
>>>    #ifndef ARCH_TESTS_H
>>>    #define ARCH_TESTS_H
>>>    +struct test_suite;
>>> +
>>> +int test__cpuid_match(struct test_suite *test, int subtest);
>>>    extern struct test_suite *arch_tests[];
>>>      #endif
>>> diff --git a/tools/perf/arch/arm64/tests/Build
>>> b/tools/perf/arch/arm64/tests/Build
>>> index a61c06bdb757..e337c09e7f56 100644
>>> --- a/tools/perf/arch/arm64/tests/Build
>>> +++ b/tools/perf/arch/arm64/tests/Build
>>> @@ -2,3 +2,4 @@ perf-y += regs_load.o
>>>    perf-$(CONFIG_DWARF_UNWIND) += dwarf-unwind.o
>>>      perf-y += arch-tests.o
>>> +perf-y += cpuid-match.o
>>> diff --git a/tools/perf/arch/arm64/tests/arch-tests.c
>>> b/tools/perf/arch/arm64/tests/arch-tests.c
>>> index ad16b4f8f63e..74932e72c727 100644
>>> --- a/tools/perf/arch/arm64/tests/arch-tests.c
>>> +++ b/tools/perf/arch/arm64/tests/arch-tests.c
>>> @@ -3,9 +3,13 @@
>>>    #include "tests/tests.h"
>>>    #include "arch-tests.h"
>>>    +
>>> +DEFINE_SUITE("arm64 CPUID matching", cpuid_match);
>>> +
>>>    struct test_suite *arch_tests[] = {
>>>    #ifdef HAVE_DWARF_UNWIND_SUPPORT
>>>        &suite__dwarf_unwind,
>>>    #endif
>>> +    &suite__cpuid_match,
>>>        NULL,
>>>    };
>>> diff --git a/tools/perf/arch/arm64/tests/cpuid-match.c
>>> b/tools/perf/arch/arm64/tests/cpuid-match.c
>>> new file mode 100644
>>> index 000000000000..af0871b54ae7
>>> --- /dev/null
>>> +++ b/tools/perf/arch/arm64/tests/cpuid-match.c
>>> @@ -0,0 +1,38 @@
>>> +// SPDX-License-Identifier: GPL-2.0
>>> +#include <linux/compiler.h>
>>> +
>>> +#include "arch-tests.h"
>>> +#include "tests/tests.h"
>>> +#include "util/header.h"
>>> +
>>> +int test__cpuid_match(struct test_suite *test __maybe_unused,
>>> +                 int subtest __maybe_unused)
>>> +{
>>> +    /* midr with no leading zeros matches */
>>> +    if (strcmp_cpuid_str("0x410fd0c0", "0x00000000410fd0c0"))
>>> +        return -1;
>>> +    /* Upper case matches */
>>> +    if (strcmp_cpuid_str("0x410fd0c0", "0x00000000410FD0C0"))
>>> +        return -1;
>>> +    /* r0p0 = r0p0 matches */
>>> +    if (strcmp_cpuid_str("0x00000000410fd480", "0x00000000410fd480"))
>>> +        return -1;
>>> +    /* r0p1 > r0p0 matches */
>>> +    if (strcmp_cpuid_str("0x00000000410fd480", "0x00000000410fd481"))
>>> +        return -1;
>>> +    /* r1p0 > r0p0 matches*/
>>> +    if (strcmp_cpuid_str("0x00000000410fd480", "0x00000000411fd480"))
>>> +        return -1;
>>> +    /* r0p0 < r0p1 doesn't match */
>>> +    if (!strcmp_cpuid_str("0x00000000410fd481", "0x00000000410fd480"))
>>> +        return -1;
>>> +    /* r0p0 < r1p0 doesn't match */
>>> +    if (!strcmp_cpuid_str("0x00000000411fd480", "0x00000000410fd480"))
>>> +        return -1;
>>> +    /* Different CPU doesn't match */
>>> +    if (!strcmp_cpuid_str("0x00000000410fd4c0", "0x00000000430f0af0"))
>>> +        return -1;
>>> +
>>> +    return 0;
>>> +}
>>> +
>>
>> Would it be possible to put this in core test code, since x86 also
>> supports strcmp_cpuid_str()?
>>
> 
> That's how I started, but Ian suggested to move it to an arch specific
> folder because that's what it was testing.
> 

Yeah, I see that comment now.

> We could still add test__cpuid_match() in the x86 folder rather than
> adding it with #ifdefs

I was thinking to make cpuid_match_array[] exposed by the arch code and 
have a "weak", i.e. version for other archs.

, but I don't think it needs to be done here
> because I haven't touched the x86 code.

For the moment, I don't feel too strongly about this and it can be done 
as a follow-up

Reviewed-by: John Garry <john.g.garry@oracle.com>

> 
>> Maybe we would have an structure per arch of cpuids and expected
>> results, like
>>
>> struct cpuid_match {
>>      char *cpuid1;
>>      char *cpuid1;
>>      int expected_result;
>> };
>>
>>
>> #ifdef ARM64
>>   cpuid_match_array[] = {
>>      {"0x410fd0c0", "0x00000000410FD0C0", -1},
>>      {"0x00000000410fd480", "0x00000000410fd480", -1},
>>      ...
>>      {} /* sentinel */
>>
>> };
>> #else if defined(X86)
>>   cpuid_match_array[] = {
>>      {....}
>>      ...
>>      {} /* sentinel */
>>
>> };
>> #else
>> /* no support */
>> #endif
>>
>> Thanks,
>> John
diff mbox series

Patch

diff --git a/tools/perf/arch/arm64/include/arch-tests.h b/tools/perf/arch/arm64/include/arch-tests.h
index 452b3d904521..474d7cf5afbd 100644
--- a/tools/perf/arch/arm64/include/arch-tests.h
+++ b/tools/perf/arch/arm64/include/arch-tests.h
@@ -2,6 +2,9 @@ 
 #ifndef ARCH_TESTS_H
 #define ARCH_TESTS_H
 
+struct test_suite;
+
+int test__cpuid_match(struct test_suite *test, int subtest);
 extern struct test_suite *arch_tests[];
 
 #endif
diff --git a/tools/perf/arch/arm64/tests/Build b/tools/perf/arch/arm64/tests/Build
index a61c06bdb757..e337c09e7f56 100644
--- a/tools/perf/arch/arm64/tests/Build
+++ b/tools/perf/arch/arm64/tests/Build
@@ -2,3 +2,4 @@  perf-y += regs_load.o
 perf-$(CONFIG_DWARF_UNWIND) += dwarf-unwind.o
 
 perf-y += arch-tests.o
+perf-y += cpuid-match.o
diff --git a/tools/perf/arch/arm64/tests/arch-tests.c b/tools/perf/arch/arm64/tests/arch-tests.c
index ad16b4f8f63e..74932e72c727 100644
--- a/tools/perf/arch/arm64/tests/arch-tests.c
+++ b/tools/perf/arch/arm64/tests/arch-tests.c
@@ -3,9 +3,13 @@ 
 #include "tests/tests.h"
 #include "arch-tests.h"
 
+
+DEFINE_SUITE("arm64 CPUID matching", cpuid_match);
+
 struct test_suite *arch_tests[] = {
 #ifdef HAVE_DWARF_UNWIND_SUPPORT
 	&suite__dwarf_unwind,
 #endif
+	&suite__cpuid_match,
 	NULL,
 };
diff --git a/tools/perf/arch/arm64/tests/cpuid-match.c b/tools/perf/arch/arm64/tests/cpuid-match.c
new file mode 100644
index 000000000000..af0871b54ae7
--- /dev/null
+++ b/tools/perf/arch/arm64/tests/cpuid-match.c
@@ -0,0 +1,38 @@ 
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/compiler.h>
+
+#include "arch-tests.h"
+#include "tests/tests.h"
+#include "util/header.h"
+
+int test__cpuid_match(struct test_suite *test __maybe_unused,
+			     int subtest __maybe_unused)
+{
+	/* midr with no leading zeros matches */
+	if (strcmp_cpuid_str("0x410fd0c0", "0x00000000410fd0c0"))
+		return -1;
+	/* Upper case matches */
+	if (strcmp_cpuid_str("0x410fd0c0", "0x00000000410FD0C0"))
+		return -1;
+	/* r0p0 = r0p0 matches */
+	if (strcmp_cpuid_str("0x00000000410fd480", "0x00000000410fd480"))
+		return -1;
+	/* r0p1 > r0p0 matches */
+	if (strcmp_cpuid_str("0x00000000410fd480", "0x00000000410fd481"))
+		return -1;
+	/* r1p0 > r0p0 matches*/
+	if (strcmp_cpuid_str("0x00000000410fd480", "0x00000000411fd480"))
+		return -1;
+	/* r0p0 < r0p1 doesn't match */
+	if (!strcmp_cpuid_str("0x00000000410fd481", "0x00000000410fd480"))
+		return -1;
+	/* r0p0 < r1p0 doesn't match */
+	if (!strcmp_cpuid_str("0x00000000411fd480", "0x00000000410fd480"))
+		return -1;
+	/* Different CPU doesn't match */
+	if (!strcmp_cpuid_str("0x00000000410fd4c0", "0x00000000430f0af0"))
+		return -1;
+
+	return 0;
+}
+