Subject: Re: [PATCH v5 09/11] perf/tools: Enhance JSON/metric infrastructure to handle "?"

From: Jiri Olsa <[email-masked]>
Date: Tue, 17 Mar 2020 16:07:03 +0100

On Tue, Mar 17, 2020 at 11:53:31AM +0530, Kajol Jain wrote:

SNIP

> diff --git a/tools/perf/arch/powerpc/util/header.c b/tools/perf/arch/powerpc/util/header.c
> index 3b4cdfc5efd6..dcc3c6ab2e67 100644
> --- a/tools/perf/arch/powerpc/util/header.c
> +++ b/tools/perf/arch/powerpc/util/header.c
> @@ -7,6 +7,8 @@
>  #include <string.h>
>  #include <linux/stringify.h>
>  #include "header.h"
> +#include "metricgroup.h"
> +#include <api/fs/fs.h>
>  
>  #define mfspr(rn)       ({unsigned long rval; \
>  			 asm volatile("mfspr %0," __stringify(rn) \
> @@ -16,6 +18,8 @@
>  #define PVR_VER(pvr)    (((pvr) >>  16) & 0xFFFF) /* Version field */
>  #define PVR_REV(pvr)    (((pvr) >>   0) & 0xFFFF) /* Revison field */
>  
> +#define SOCKETS_INFO_FILE_PATH "/devices/hv_24x7/interface/sockets"
> +
>  int
>  get_cpuid(char *buffer, size_t sz)
>  {
> @@ -44,3 +48,9 @@ get_cpuid_str(struct perf_pmu *pmu __maybe_unused)
>  
>  	return bufp;
>  }
> +
> +int arch_get_runtimeparam(void)
> +{
> +	int count;
> +	return sysfs__read_int(SOCKETS_INFO_FILE_PATH, &count) < 0 ? 1 : count;

is that SOCKETS_INFO_FILE_PATH define used later? if not please
put the path directly as an argument to sysfs__read_int

jirka