Add an arm64 version of get_cpuid(), which is used for various annotation
and headers - for example, I now get the CPUID in "perf report --header",
as shown in this snippet:
# hostname : ubuntu
# os release : 5.5.0-rc1-dirty
# perf version : 5.5.rc1.gbf8a13dc9851
# arch : aarch64
# nrcpus online : 96
# nrcpus avail : 96
# cpuid : 0x00000000480fd010
Since much of the code to read the MIDR is already in get_cpuid_str(),
factor out this code.
Signed-off-by: John Garry <[email protected]>
diff --git a/tools/perf/arch/arm64/util/header.c b/tools/perf/arch/arm64/util/header.c
index a32e4b72a98f..d730666ab95d 100644
--- a/tools/perf/arch/arm64/util/header.c
+++ b/tools/perf/arch/arm64/util/header.c
@@ -1,8 +1,10 @@
#include <stdio.h>
#include <stdlib.h>
#include <perf/cpumap.h>
+#include <util/cpumap.h>
#include <internal/cpumap.h>
#include <api/fs/fs.h>
+#include <errno.h>
#include "debug.h"
#include "header.h"
@@ -12,26 +14,21 @@
#define MIDR_VARIANT_SHIFT 20
#define MIDR_VARIANT_MASK (0xf << MIDR_VARIANT_SHIFT)
-char *get_cpuid_str(struct perf_pmu *pmu)
+static int _get_cpuid(char *buf, size_t sz, struct perf_cpu_map *cpus)
{
- char *buf = NULL;
- char path[PATH_MAX];
const char *sysfs = sysfs__mountpoint();
- int cpu;
u64 midr = 0;
- struct perf_cpu_map *cpus;
- FILE *file;
+ int cpu;
- if (!sysfs || !pmu || !pmu->cpus)
- return NULL;
+ if (!sysfs || sz < MIDR_SIZE)
+ return EINVAL;
- buf = malloc(MIDR_SIZE);
- if (!buf)
- return NULL;
+ cpus = perf_cpu_map__get(cpus);
- /* read midr from list of cpus mapped to this pmu */
- cpus = perf_cpu_map__get(pmu->cpus);
for (cpu = 0; cpu < perf_cpu_map__nr(cpus); cpu++) {
+ char path[PATH_MAX];
+ FILE *file;
+
scnprintf(path, PATH_MAX, "%s/devices/system/cpu/cpu%d"MIDR,
sysfs, cpus->map[cpu]);
@@ -57,12 +54,48 @@ char *get_cpuid_str(struct perf_pmu *pmu)
break;
}
- if (!midr) {
+ perf_cpu_map__put(cpus);
+
+ if (!midr)
+ return EINVAL;
+
+ return 0;
+}
+
+int get_cpuid(char *buf, size_t sz)
+{
+ struct perf_cpu_map *cpus = perf_cpu_map__new(NULL);
+ int ret;
+
+ if (!cpus)
+ return EINVAL;
+
+ ret = _get_cpuid(buf, sz, cpus);
+
+ perf_cpu_map__put(cpus);
+
+ return ret;
+}
+
+char *get_cpuid_str(struct perf_pmu *pmu)
+{
+ char *buf = NULL;
+ int res;
+
+ if (!pmu || !pmu->cpus)
+ return NULL;
+
+ buf = malloc(MIDR_SIZE);
+ if (!buf)
+ return NULL;
+
+ /* read midr from list of cpus mapped to this pmu */
+ res = _get_cpuid(buf, MIDR_SIZE, pmu->cpus);
+ if (res) {
pr_err("failed to get cpuid string for PMU %s\n", pmu->name);
free(buf);
buf = NULL;
}
- perf_cpu_map__put(cpus);
return buf;
}
--
2.17.1
On 13/12/2019 13:54, John Garry wrote:
Hi Arnaldo,
Do we need some reviews on this? Or was it missed/still catching up?
Cheers,
John
> Add an arm64 version of get_cpuid(), which is used for various annotation
> and headers - for example, I now get the CPUID in "perf report --header",
> as shown in this snippet:
>
> # hostname : ubuntu
> # os release : 5.5.0-rc1-dirty
> # perf version : 5.5.rc1.gbf8a13dc9851
> # arch : aarch64
> # nrcpus online : 96
> # nrcpus avail : 96
> # cpuid : 0x00000000480fd010
>
> Since much of the code to read the MIDR is already in get_cpuid_str(),
> factor out this code.
>
> Signed-off-by: John Garry <[email protected]>
>
> diff --git a/tools/perf/arch/arm64/util/header.c b/tools/perf/arch/arm64/util/header.c
> index a32e4b72a98f..d730666ab95d 100644
> --- a/tools/perf/arch/arm64/util/header.c
> +++ b/tools/perf/arch/arm64/util/header.c
> @@ -1,8 +1,10 @@
> #include <stdio.h>
> #include <stdlib.h>
> #include <perf/cpumap.h>
> +#include <util/cpumap.h>
> #include <internal/cpumap.h>
> #include <api/fs/fs.h>
> +#include <errno.h>
> #include "debug.h"
> #include "header.h"
>
> @@ -12,26 +14,21 @@
> #define MIDR_VARIANT_SHIFT 20
> #define MIDR_VARIANT_MASK (0xf << MIDR_VARIANT_SHIFT)
>
> -char *get_cpuid_str(struct perf_pmu *pmu)
> +static int _get_cpuid(char *buf, size_t sz, struct perf_cpu_map *cpus)
> {
> - char *buf = NULL;
> - char path[PATH_MAX];
> const char *sysfs = sysfs__mountpoint();
> - int cpu;
> u64 midr = 0;
> - struct perf_cpu_map *cpus;
> - FILE *file;
> + int cpu;
>
> - if (!sysfs || !pmu || !pmu->cpus)
> - return NULL;
> + if (!sysfs || sz < MIDR_SIZE)
> + return EINVAL;
>
> - buf = malloc(MIDR_SIZE);
> - if (!buf)
> - return NULL;
> + cpus = perf_cpu_map__get(cpus);
>
> - /* read midr from list of cpus mapped to this pmu */
> - cpus = perf_cpu_map__get(pmu->cpus);
> for (cpu = 0; cpu < perf_cpu_map__nr(cpus); cpu++) {
> + char path[PATH_MAX];
> + FILE *file;
> +
> scnprintf(path, PATH_MAX, "%s/devices/system/cpu/cpu%d"MIDR,
> sysfs, cpus->map[cpu]);
>
> @@ -57,12 +54,48 @@ char *get_cpuid_str(struct perf_pmu *pmu)
> break;
> }
>
> - if (!midr) {
> + perf_cpu_map__put(cpus);
> +
> + if (!midr)
> + return EINVAL;
> +
> + return 0;
> +}
> +
> +int get_cpuid(char *buf, size_t sz)
> +{
> + struct perf_cpu_map *cpus = perf_cpu_map__new(NULL);
> + int ret;
> +
> + if (!cpus)
> + return EINVAL;
> +
> + ret = _get_cpuid(buf, sz, cpus);
> +
> + perf_cpu_map__put(cpus);
> +
> + return ret;
> +}
> +
> +char *get_cpuid_str(struct perf_pmu *pmu)
> +{
> + char *buf = NULL;
> + int res;
> +
> + if (!pmu || !pmu->cpus)
> + return NULL;
> +
> + buf = malloc(MIDR_SIZE);
> + if (!buf)
> + return NULL;
> +
> + /* read midr from list of cpus mapped to this pmu */
> + res = _get_cpuid(buf, MIDR_SIZE, pmu->cpus);
> + if (res) {
> pr_err("failed to get cpuid string for PMU %s\n", pmu->name);
> free(buf);
> buf = NULL;
> }
>
> - perf_cpu_map__put(cpus);
> return buf;
> }
>
Hi John,
I tested this patch on my new ARM64 Kunpeng 920 server.
[root@node1 zsk]# ./perf --version
perf version 5.6.rc1.g2cdb955b7252
Both perf list and perf stat can work.
Tested-by: Shaokun Zhang <[email protected]>
Thanks,
Shaokun
On 2019/12/13 21:54, John Garry wrote:
> Add an arm64 version of get_cpuid(), which is used for various annotation
> and headers - for example, I now get the CPUID in "perf report --header",
> as shown in this snippet:
>
> # hostname : ubuntu
> # os release : 5.5.0-rc1-dirty
> # perf version : 5.5.rc1.gbf8a13dc9851
> # arch : aarch64
> # nrcpus online : 96
> # nrcpus avail : 96
> # cpuid : 0x00000000480fd010
>
> Since much of the code to read the MIDR is already in get_cpuid_str(),
> factor out this code.
>
> Signed-off-by: John Garry <[email protected]>
>
> diff --git a/tools/perf/arch/arm64/util/header.c b/tools/perf/arch/arm64/util/header.c
> index a32e4b72a98f..d730666ab95d 100644
> --- a/tools/perf/arch/arm64/util/header.c
> +++ b/tools/perf/arch/arm64/util/header.c
> @@ -1,8 +1,10 @@
> #include <stdio.h>
> #include <stdlib.h>
> #include <perf/cpumap.h>
> +#include <util/cpumap.h>
> #include <internal/cpumap.h>
> #include <api/fs/fs.h>
> +#include <errno.h>
> #include "debug.h"
> #include "header.h"
>
> @@ -12,26 +14,21 @@
> #define MIDR_VARIANT_SHIFT 20
> #define MIDR_VARIANT_MASK (0xf << MIDR_VARIANT_SHIFT)
>
> -char *get_cpuid_str(struct perf_pmu *pmu)
> +static int _get_cpuid(char *buf, size_t sz, struct perf_cpu_map *cpus)
> {
> - char *buf = NULL;
> - char path[PATH_MAX];
> const char *sysfs = sysfs__mountpoint();
> - int cpu;
> u64 midr = 0;
> - struct perf_cpu_map *cpus;
> - FILE *file;
> + int cpu;
>
> - if (!sysfs || !pmu || !pmu->cpus)
> - return NULL;
> + if (!sysfs || sz < MIDR_SIZE)
> + return EINVAL;
>
> - buf = malloc(MIDR_SIZE);
> - if (!buf)
> - return NULL;
> + cpus = perf_cpu_map__get(cpus);
>
> - /* read midr from list of cpus mapped to this pmu */
> - cpus = perf_cpu_map__get(pmu->cpus);
> for (cpu = 0; cpu < perf_cpu_map__nr(cpus); cpu++) {
> + char path[PATH_MAX];
> + FILE *file;
> +
> scnprintf(path, PATH_MAX, "%s/devices/system/cpu/cpu%d"MIDR,
> sysfs, cpus->map[cpu]);
>
> @@ -57,12 +54,48 @@ char *get_cpuid_str(struct perf_pmu *pmu)
> break;
> }
>
> - if (!midr) {
> + perf_cpu_map__put(cpus);
> +
> + if (!midr)
> + return EINVAL;
> +
> + return 0;
> +}
> +
> +int get_cpuid(char *buf, size_t sz)
> +{
> + struct perf_cpu_map *cpus = perf_cpu_map__new(NULL);
> + int ret;
> +
> + if (!cpus)
> + return EINVAL;
> +
> + ret = _get_cpuid(buf, sz, cpus);
> +
> + perf_cpu_map__put(cpus);
> +
> + return ret;
> +}
> +
> +char *get_cpuid_str(struct perf_pmu *pmu)
> +{
> + char *buf = NULL;
> + int res;
> +
> + if (!pmu || !pmu->cpus)
> + return NULL;
> +
> + buf = malloc(MIDR_SIZE);
> + if (!buf)
> + return NULL;
> +
> + /* read midr from list of cpus mapped to this pmu */
> + res = _get_cpuid(buf, MIDR_SIZE, pmu->cpus);
> + if (res) {
> pr_err("failed to get cpuid string for PMU %s\n", pmu->name);
> free(buf);
> buf = NULL;
> }
>
> - perf_cpu_map__put(cpus);
> return buf;
> }
>
Em Wed, Feb 12, 2020 at 05:30:56PM +0800, Shaokun Zhang escreveu:
> Hi John,
>
> I tested this patch on my new ARM64 Kunpeng 920 server.
> [root@node1 zsk]# ./perf --version
> perf version 5.6.rc1.g2cdb955b7252
>
> Both perf list and perf stat can work.
>
> Tested-by: Shaokun Zhang <[email protected]>
Thanks for the test and for (re)bringing this patch to my attention, I'll
process it now.
Thanks!
- Arnaldo
> Thanks,
> Shaokun
>
> On 2019/12/13 21:54, John Garry wrote:
> > Add an arm64 version of get_cpuid(), which is used for various annotation
> > and headers - for example, I now get the CPUID in "perf report --header",
> > as shown in this snippet:
> >
> > # hostname : ubuntu
> > # os release : 5.5.0-rc1-dirty
> > # perf version : 5.5.rc1.gbf8a13dc9851
> > # arch : aarch64
> > # nrcpus online : 96
> > # nrcpus avail : 96
> > # cpuid : 0x00000000480fd010
> >
> > Since much of the code to read the MIDR is already in get_cpuid_str(),
> > factor out this code.
> >
> > Signed-off-by: John Garry <[email protected]>
> >
> > diff --git a/tools/perf/arch/arm64/util/header.c b/tools/perf/arch/arm64/util/header.c
> > index a32e4b72a98f..d730666ab95d 100644
> > --- a/tools/perf/arch/arm64/util/header.c
> > +++ b/tools/perf/arch/arm64/util/header.c
> > @@ -1,8 +1,10 @@
> > #include <stdio.h>
> > #include <stdlib.h>
> > #include <perf/cpumap.h>
> > +#include <util/cpumap.h>
> > #include <internal/cpumap.h>
> > #include <api/fs/fs.h>
> > +#include <errno.h>
> > #include "debug.h"
> > #include "header.h"
> >
> > @@ -12,26 +14,21 @@
> > #define MIDR_VARIANT_SHIFT 20
> > #define MIDR_VARIANT_MASK (0xf << MIDR_VARIANT_SHIFT)
> >
> > -char *get_cpuid_str(struct perf_pmu *pmu)
> > +static int _get_cpuid(char *buf, size_t sz, struct perf_cpu_map *cpus)
> > {
> > - char *buf = NULL;
> > - char path[PATH_MAX];
> > const char *sysfs = sysfs__mountpoint();
> > - int cpu;
> > u64 midr = 0;
> > - struct perf_cpu_map *cpus;
> > - FILE *file;
> > + int cpu;
> >
> > - if (!sysfs || !pmu || !pmu->cpus)
> > - return NULL;
> > + if (!sysfs || sz < MIDR_SIZE)
> > + return EINVAL;
> >
> > - buf = malloc(MIDR_SIZE);
> > - if (!buf)
> > - return NULL;
> > + cpus = perf_cpu_map__get(cpus);
> >
> > - /* read midr from list of cpus mapped to this pmu */
> > - cpus = perf_cpu_map__get(pmu->cpus);
> > for (cpu = 0; cpu < perf_cpu_map__nr(cpus); cpu++) {
> > + char path[PATH_MAX];
> > + FILE *file;
> > +
> > scnprintf(path, PATH_MAX, "%s/devices/system/cpu/cpu%d"MIDR,
> > sysfs, cpus->map[cpu]);
> >
> > @@ -57,12 +54,48 @@ char *get_cpuid_str(struct perf_pmu *pmu)
> > break;
> > }
> >
> > - if (!midr) {
> > + perf_cpu_map__put(cpus);
> > +
> > + if (!midr)
> > + return EINVAL;
> > +
> > + return 0;
> > +}
> > +
> > +int get_cpuid(char *buf, size_t sz)
> > +{
> > + struct perf_cpu_map *cpus = perf_cpu_map__new(NULL);
> > + int ret;
> > +
> > + if (!cpus)
> > + return EINVAL;
> > +
> > + ret = _get_cpuid(buf, sz, cpus);
> > +
> > + perf_cpu_map__put(cpus);
> > +
> > + return ret;
> > +}
> > +
> > +char *get_cpuid_str(struct perf_pmu *pmu)
> > +{
> > + char *buf = NULL;
> > + int res;
> > +
> > + if (!pmu || !pmu->cpus)
> > + return NULL;
> > +
> > + buf = malloc(MIDR_SIZE);
> > + if (!buf)
> > + return NULL;
> > +
> > + /* read midr from list of cpus mapped to this pmu */
> > + res = _get_cpuid(buf, MIDR_SIZE, pmu->cpus);
> > + if (res) {
> > pr_err("failed to get cpuid string for PMU %s\n", pmu->name);
> > free(buf);
> > buf = NULL;
> > }
> >
> > - perf_cpu_map__put(cpus);
> > return buf;
> > }
> >
>
--
- Arnaldo
Em Tue, Jan 07, 2020 at 09:13:43AM +0000, John Garry escreveu:
> On 13/12/2019 13:54, John Garry wrote:
>
> Hi Arnaldo,
>
> Do we need some reviews on this? Or was it missed/still catching up?
Got lost in the holidays, devconf.cz, vacations, sorry, picking it up
now, together with a Tested-by by Shaokun Zhang, some issues with the
formatting of the patch:
- Avoid starting lines with '#' as those will vanish when I use 'git am'
- Separate the commit log message from the diff using a '---' at the
begining of the line, otherwise 'git am' fails
I fixed those up now, will test with my build containers, thanks.
- Arnaldo
> Cheers,
> John
>
> > Add an arm64 version of get_cpuid(), which is used for various annotation
> > and headers - for example, I now get the CPUID in "perf report --header",
> > as shown in this snippet:
> >
> > # hostname : ubuntu
> > # os release : 5.5.0-rc1-dirty
> > # perf version : 5.5.rc1.gbf8a13dc9851
> > # arch : aarch64
> > # nrcpus online : 96
> > # nrcpus avail : 96
> > # cpuid : 0x00000000480fd010
> >
> > Since much of the code to read the MIDR is already in get_cpuid_str(),
> > factor out this code.
> >
> > Signed-off-by: John Garry <[email protected]>
> >
> > diff --git a/tools/perf/arch/arm64/util/header.c b/tools/perf/arch/arm64/util/header.c
> > index a32e4b72a98f..d730666ab95d 100644
> > --- a/tools/perf/arch/arm64/util/header.c
> > +++ b/tools/perf/arch/arm64/util/header.c
> > @@ -1,8 +1,10 @@
> > #include <stdio.h>
> > #include <stdlib.h>
> > #include <perf/cpumap.h>
> > +#include <util/cpumap.h>
> > #include <internal/cpumap.h>
> > #include <api/fs/fs.h>
> > +#include <errno.h>
> > #include "debug.h"
> > #include "header.h"
> > @@ -12,26 +14,21 @@
> > #define MIDR_VARIANT_SHIFT 20
> > #define MIDR_VARIANT_MASK (0xf << MIDR_VARIANT_SHIFT)
> > -char *get_cpuid_str(struct perf_pmu *pmu)
> > +static int _get_cpuid(char *buf, size_t sz, struct perf_cpu_map *cpus)
> > {
> > - char *buf = NULL;
> > - char path[PATH_MAX];
> > const char *sysfs = sysfs__mountpoint();
> > - int cpu;
> > u64 midr = 0;
> > - struct perf_cpu_map *cpus;
> > - FILE *file;
> > + int cpu;
> > - if (!sysfs || !pmu || !pmu->cpus)
> > - return NULL;
> > + if (!sysfs || sz < MIDR_SIZE)
> > + return EINVAL;
> > - buf = malloc(MIDR_SIZE);
> > - if (!buf)
> > - return NULL;
> > + cpus = perf_cpu_map__get(cpus);
> > - /* read midr from list of cpus mapped to this pmu */
> > - cpus = perf_cpu_map__get(pmu->cpus);
> > for (cpu = 0; cpu < perf_cpu_map__nr(cpus); cpu++) {
> > + char path[PATH_MAX];
> > + FILE *file;
> > +
> > scnprintf(path, PATH_MAX, "%s/devices/system/cpu/cpu%d"MIDR,
> > sysfs, cpus->map[cpu]);
> > @@ -57,12 +54,48 @@ char *get_cpuid_str(struct perf_pmu *pmu)
> > break;
> > }
> > - if (!midr) {
> > + perf_cpu_map__put(cpus);
> > +
> > + if (!midr)
> > + return EINVAL;
> > +
> > + return 0;
> > +}
> > +
> > +int get_cpuid(char *buf, size_t sz)
> > +{
> > + struct perf_cpu_map *cpus = perf_cpu_map__new(NULL);
> > + int ret;
> > +
> > + if (!cpus)
> > + return EINVAL;
> > +
> > + ret = _get_cpuid(buf, sz, cpus);
> > +
> > + perf_cpu_map__put(cpus);
> > +
> > + return ret;
> > +}
> > +
> > +char *get_cpuid_str(struct perf_pmu *pmu)
> > +{
> > + char *buf = NULL;
> > + int res;
> > +
> > + if (!pmu || !pmu->cpus)
> > + return NULL;
> > +
> > + buf = malloc(MIDR_SIZE);
> > + if (!buf)
> > + return NULL;
> > +
> > + /* read midr from list of cpus mapped to this pmu */
> > + res = _get_cpuid(buf, MIDR_SIZE, pmu->cpus);
> > + if (res) {
> > pr_err("failed to get cpuid string for PMU %s\n", pmu->name);
> > free(buf);
> > buf = NULL;
> > }
> > - perf_cpu_map__put(cpus);
> > return buf;
> > }
> >
>
--
- Arnaldo
On 12/02/2020 13:40, Arnaldo Carvalho de Melo wrote:
> Em Tue, Jan 07, 2020 at 09:13:43AM +0000, John Garry escreveu:
>> On 13/12/2019 13:54, John Garry wrote:
>>
>> Hi Arnaldo,
>>
>> Do we need some reviews on this? Or was it missed/still catching up?
>
> Got lost in the holidays, devconf.cz, vacations, sorry, picking it up
> now, together with a Tested-by by Shaokun Zhang, some issues with the
> formatting of the patch:
>
> - Avoid starting lines with '#' as those will vanish when I use 'git am'
ah, so this must be why people use, for example, '/include "..."' in
commit logs
>
> - Separate the commit log message from the diff using a '---' at the
> begining of the line, otherwise 'git am' fails
apologizes, I must have cut that by mistake
>
> I fixed those up now, will test with my build containers, thanks.
>
Thanks
> - Arnaldo
>
>> Cheers,
>> John
>>
>>> Add an arm64 version of get_cpuid(), which is used for various annotation
>>> and headers - for example, I now get the CPUID in "perf report --header",
>>> as shown in this snippet:
>>>
>>> # hostname : ubuntu
>>> # os release : 5.5.0-rc1-dirty
>>> # perf version : 5.5.rc1.gbf8a13dc9851
>>> # arch : aarch64
>>> # nrcpus online : 96
>>> # nrcpus avail : 96
>>> # cpuid : 0x00000000480fd010
>>>
>>> Since much of the code to read the MIDR is already in get_cpuid_str(),
>>> factor out this code.
>>>
>>> Signed-off-by: John Garry <[email protected]>
>>>
>>> diff --git a/tools/perf/arch/arm64/util/header.c b/tools/perf/arch/arm64/util/header.c
>>> index a32e4b72a98f..d730666ab95d 100644
>>> --- a/tools/perf/arch/arm64/util/header.c
>>> +++ b/tools/perf/arch/arm64/util/header.c
>>> @@ -1,8 +1,10 @@
>>> #include <stdio.h>
>>> #include <stdlib.h>
>>> #include <perf/cpumap.h>
>>> +#include <util/cpumap.h>
>>> #include <internal/cpumap.h>
>>> #include <api/fs/fs.h>
>>> +#include <errno.h>
>>> #include "debug.h"
>>> #include "header.h"
>>> @@ -12,26 +14,21 @@
>>> #define MIDR_VARIANT_SHIFT 20
>>> #define MIDR_VARIANT_MASK (0xf << MIDR_VARIANT_SHIFT)
>>> -char *get_cpuid_str(struct perf_pmu *pmu)
>>> +static int _get_cpuid(char *buf, size_t sz, struct perf_cpu_map *cpus)
>>> {
>>> - char *buf = NULL;
>>> - char path[PATH_MAX];
>>> const char *sysfs = sysfs__mountpoint();
>>> - int cpu;
>>> u64 midr = 0;
>>> - struct perf_cpu_map *cpus;
>>> - FILE *file;
>>> + int cpu;
>>> - if (!sysfs || !pmu || !pmu->cpus)
>>> - return NULL;
>>> + if (!sysfs || sz < MIDR_SIZE)
>>> + return EINVAL;
>>> - buf = malloc(MIDR_SIZE);
>>> - if (!buf)
>>> - return NULL;
>>> + cpus = perf_cpu_map__get(cpus);
>>> - /* read midr from list of cpus mapped to this pmu */
>>> - cpus = perf_cpu_map__get(pmu->cpus);
>>> for (cpu = 0; cpu < perf_cpu_map__nr(cpus); cpu++) {
>>> + char path[PATH_MAX];
>>> + FILE *file;
>>> +
>>> scnprintf(path, PATH_MAX, "%s/devices/system/cpu/cpu%d"MIDR,
>>> sysfs, cpus->map[cpu]);
>>> @@ -57,12 +54,48 @@ char *get_cpuid_str(struct perf_pmu *pmu)
>>> break;
>>> }
>>> - if (!midr) {
>>> + perf_cpu_map__put(cpus);
>>> +
>>> + if (!midr)
>>> + return EINVAL;
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +int get_cpuid(char *buf, size_t sz)
>>> +{
>>> + struct perf_cpu_map *cpus = perf_cpu_map__new(NULL);
>>> + int ret;
>>> +
>>> + if (!cpus)
>>> + return EINVAL;
>>> +
>>> + ret = _get_cpuid(buf, sz, cpus);
>>> +
>>> + perf_cpu_map__put(cpus);
>>> +
>>> + return ret;
>>> +}
>>> +
>>> +char *get_cpuid_str(struct perf_pmu *pmu)
>>> +{
>>> + char *buf = NULL;
>>> + int res;
>>> +
>>> + if (!pmu || !pmu->cpus)
>>> + return NULL;
>>> +
>>> + buf = malloc(MIDR_SIZE);
>>> + if (!buf)
>>> + return NULL;
>>> +
>>> + /* read midr from list of cpus mapped to this pmu */
>>> + res = _get_cpuid(buf, MIDR_SIZE, pmu->cpus);
>>> + if (res) {
>>> pr_err("failed to get cpuid string for PMU %s\n", pmu->name);
>>> free(buf);
>>> buf = NULL;
>>> }
>>> - perf_cpu_map__put(cpus);
>>> return buf;
>>> }
>>>
>>
>
The following commit has been merged into the perf/urgent branch of tip:
Commit-ID: df5a5f3cf24608457bb5e57297dd9f0d528be58f
Gitweb: https://git.kernel.org/tip/df5a5f3cf24608457bb5e57297dd9f0d528be58f
Author: John Garry <[email protected]>
AuthorDate: Fri, 13 Dec 2019 21:54:15 +08:00
Committer: Arnaldo Carvalho de Melo <[email protected]>
CommitterDate: Wed, 12 Feb 2020 10:36:51 -03:00
perf tools: Add arm64 version of get_cpuid()
Add an arm64 version of get_cpuid(), which is used for various annotation
and headers - for example, I now get the CPUID in "perf report --header",
as shown in this snippet:
# hostname : ubuntu
# os release : 5.5.0-rc1-dirty
# perf version : 5.5.rc1.gbf8a13dc9851
# arch : aarch64
# nrcpus online : 96
# nrcpus avail : 96
# cpuid : 0x00000000480fd010
Since much of the code to read the MIDR is already in get_cpuid_str(),
factor out this code.
Tester notes:
I tested this patch on my new ARM64 Kunpeng 920 server.
[root@node1 zsk]# ./perf --version
perf version 5.6.rc1.g2cdb955b7252
Both perf list and perf stat can work.
Signed-off-by: John Garry <[email protected]>
Tested-by: Shaokun Zhang <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: [email protected]
Cc: [email protected]
Link: http://lore.kernel.org/lkml/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
---
tools/perf/arch/arm64/util/header.c | 63 +++++++++++++++++++++-------
1 file changed, 48 insertions(+), 15 deletions(-)
diff --git a/tools/perf/arch/arm64/util/header.c b/tools/perf/arch/arm64/util/header.c
index a32e4b7..d730666 100644
--- a/tools/perf/arch/arm64/util/header.c
+++ b/tools/perf/arch/arm64/util/header.c
@@ -1,8 +1,10 @@
#include <stdio.h>
#include <stdlib.h>
#include <perf/cpumap.h>
+#include <util/cpumap.h>
#include <internal/cpumap.h>
#include <api/fs/fs.h>
+#include <errno.h>
#include "debug.h"
#include "header.h"
@@ -12,26 +14,21 @@
#define MIDR_VARIANT_SHIFT 20
#define MIDR_VARIANT_MASK (0xf << MIDR_VARIANT_SHIFT)
-char *get_cpuid_str(struct perf_pmu *pmu)
+static int _get_cpuid(char *buf, size_t sz, struct perf_cpu_map *cpus)
{
- char *buf = NULL;
- char path[PATH_MAX];
const char *sysfs = sysfs__mountpoint();
- int cpu;
u64 midr = 0;
- struct perf_cpu_map *cpus;
- FILE *file;
+ int cpu;
- if (!sysfs || !pmu || !pmu->cpus)
- return NULL;
+ if (!sysfs || sz < MIDR_SIZE)
+ return EINVAL;
- buf = malloc(MIDR_SIZE);
- if (!buf)
- return NULL;
+ cpus = perf_cpu_map__get(cpus);
- /* read midr from list of cpus mapped to this pmu */
- cpus = perf_cpu_map__get(pmu->cpus);
for (cpu = 0; cpu < perf_cpu_map__nr(cpus); cpu++) {
+ char path[PATH_MAX];
+ FILE *file;
+
scnprintf(path, PATH_MAX, "%s/devices/system/cpu/cpu%d"MIDR,
sysfs, cpus->map[cpu]);
@@ -57,12 +54,48 @@ char *get_cpuid_str(struct perf_pmu *pmu)
break;
}
- if (!midr) {
+ perf_cpu_map__put(cpus);
+
+ if (!midr)
+ return EINVAL;
+
+ return 0;
+}
+
+int get_cpuid(char *buf, size_t sz)
+{
+ struct perf_cpu_map *cpus = perf_cpu_map__new(NULL);
+ int ret;
+
+ if (!cpus)
+ return EINVAL;
+
+ ret = _get_cpuid(buf, sz, cpus);
+
+ perf_cpu_map__put(cpus);
+
+ return ret;
+}
+
+char *get_cpuid_str(struct perf_pmu *pmu)
+{
+ char *buf = NULL;
+ int res;
+
+ if (!pmu || !pmu->cpus)
+ return NULL;
+
+ buf = malloc(MIDR_SIZE);
+ if (!buf)
+ return NULL;
+
+ /* read midr from list of cpus mapped to this pmu */
+ res = _get_cpuid(buf, MIDR_SIZE, pmu->cpus);
+ if (res) {
pr_err("failed to get cpuid string for PMU %s\n", pmu->name);
free(buf);
buf = NULL;
}
- perf_cpu_map__put(cpus);
return buf;
}