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Date: Fri, 24 Oct 2014 08:26:13 +0900
From: Namhyung Kim <namhyung@...nel.org>
To: Wang Nan <wangnan0@...wei.com>
Cc: <acme@...nel.org>, <a.p.zijlstra@...llo.nl>, <paulus@...ba.org>,
<mingo@...hat.com>, <jolsa@...hat.com>, <adrian.hunter@...el.com>,
<Waiman.Long@...com>, <linux-kernel@...r.kernel.org>,
<lizefan@...wei.com>
Subject: Re: [PATCH v2 RESEND] perf tools: makes CPUINFO_PROC to array for different kernel version
On Wed, 22 Oct 2014 15:40:14 +0800, Wang Nan wrote:
> After kernel 3.7 (commit b4b8f770eb10a1bccaf8aa0ec1956e2dd7ed1e0a),
> /proc/cpuinfo replaces 'Processor' to 'model name'. This patch makes
> CPUINFO_PROC to an array and provides two choices for ARM, makes it
> compatible for different kernel version.
>
> v1 -> v2: minor changes as suggested by Namhyung Kim:
>
> - Doesn't pass @h and @evlist to __write_cpudesc;
> - Coding style fix.
>
> Signed-off-by: Wang Nan <wangnan0@...wei.com>
Acked-by: Namhyung Kim <namhyung@...nel.org>
Thanks,
Namhyung
> ---
> tools/perf/perf.h | 24 ++++++++++++------------
> tools/perf/util/header.c | 27 +++++++++++++++++++++------
> 2 files changed, 33 insertions(+), 18 deletions(-)
>
> diff --git a/tools/perf/perf.h b/tools/perf/perf.h
> index 32bd102..1a23392 100644
> --- a/tools/perf/perf.h
> +++ b/tools/perf/perf.h
> @@ -6,7 +6,7 @@
> #if defined(__i386__)
> #define rmb() asm volatile("lock; addl $0,0(%%esp)" ::: "memory")
> #define cpu_relax() asm volatile("rep; nop" ::: "memory");
> -#define CPUINFO_PROC "model name"
> +#define CPUINFO_PROC {"model name"}
> #ifndef __NR_perf_event_open
> # define __NR_perf_event_open 336
> #endif
> @@ -15,7 +15,7 @@
> #if defined(__x86_64__)
> #define rmb() asm volatile("lfence" ::: "memory")
> #define cpu_relax() asm volatile("rep; nop" ::: "memory");
> -#define CPUINFO_PROC "model name"
> +#define CPUINFO_PROC {"model name"}
> #ifndef __NR_perf_event_open
> # define __NR_perf_event_open 298
> #endif
> @@ -25,7 +25,7 @@
> #include "../../arch/powerpc/include/uapi/asm/unistd.h"
> #define rmb() asm volatile ("sync" ::: "memory")
> #define cpu_relax() asm volatile ("" ::: "memory");
> -#define CPUINFO_PROC "cpu"
> +#define CPUINFO_PROC {"cpu"}
> #endif
>
> #ifdef __s390__
> @@ -40,31 +40,31 @@
> # define rmb() asm volatile("" ::: "memory")
> #endif
> #define cpu_relax() asm volatile("" ::: "memory")
> -#define CPUINFO_PROC "cpu type"
> +#define CPUINFO_PROC {"cpu type"}
> #endif
>
> #ifdef __hppa__
> #define rmb() asm volatile("" ::: "memory")
> #define cpu_relax() asm volatile("" ::: "memory");
> -#define CPUINFO_PROC "cpu"
> +#define CPUINFO_PROC {"cpu"}
> #endif
>
> #ifdef __sparc__
> #define rmb() asm volatile("":::"memory")
> #define cpu_relax() asm volatile("":::"memory")
> -#define CPUINFO_PROC "cpu"
> +#define CPUINFO_PROC {"cpu"}
> #endif
>
> #ifdef __alpha__
> #define rmb() asm volatile("mb" ::: "memory")
> #define cpu_relax() asm volatile("" ::: "memory")
> -#define CPUINFO_PROC "cpu model"
> +#define CPUINFO_PROC {"cpu model"}
> #endif
>
> #ifdef __ia64__
> #define rmb() asm volatile ("mf" ::: "memory")
> #define cpu_relax() asm volatile ("hint @pause" ::: "memory")
> -#define CPUINFO_PROC "model name"
> +#define CPUINFO_PROC {"model name"}
> #endif
>
> #ifdef __arm__
> @@ -74,7 +74,7 @@
> */
> #define rmb() ((void(*)(void))0xffff0fa0)()
> #define cpu_relax() asm volatile("":::"memory")
> -#define CPUINFO_PROC "Processor"
> +#define CPUINFO_PROC {"model name", "Processor"}
> #endif
>
> #ifdef __aarch64__
> @@ -91,19 +91,19 @@
> : /* no input */ \
> : "memory")
> #define cpu_relax() asm volatile("" ::: "memory")
> -#define CPUINFO_PROC "cpu model"
> +#define CPUINFO_PROC {"cpu model"}
> #endif
>
> #ifdef __arc__
> #define rmb() asm volatile("" ::: "memory")
> #define cpu_relax() rmb()
> -#define CPUINFO_PROC "Processor"
> +#define CPUINFO_PROC {"Processor"}
> #endif
>
> #ifdef __metag__
> #define rmb() asm volatile("" ::: "memory")
> #define cpu_relax() asm volatile("" ::: "memory")
> -#define CPUINFO_PROC "CPU"
> +#define CPUINFO_PROC {"CPU"}
> #endif
>
> #include <time.h>
> diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
> index b59350f..d48f571 100644
> --- a/tools/perf/util/header.c
> +++ b/tools/perf/util/header.c
> @@ -550,16 +550,12 @@ static int write_version(int fd, struct perf_header *h __maybe_unused,
> return do_write_string(fd, perf_version_string);
> }
>
> -static int write_cpudesc(int fd, struct perf_header *h __maybe_unused,
> - struct perf_evlist *evlist __maybe_unused)
> +static int __write_cpudesc(int fd, const char *cpuinfo_proc)
> {
> -#ifndef CPUINFO_PROC
> -#define CPUINFO_PROC NULL
> -#endif
> FILE *file;
> char *buf = NULL;
> char *s, *p;
> - const char *search = CPUINFO_PROC;
> + const char *search = cpuinfo_proc;
> size_t len = 0;
> int ret = -1;
>
> @@ -611,6 +607,25 @@ done:
> return ret;
> }
>
> +static int write_cpudesc(int fd, struct perf_header *h __maybe_unused,
> + struct perf_evlist *evlist __maybe_unused)
> +{
> +#ifndef CPUINFO_PROC
> +#define CPUINFO_PROC {"model name", }
> +#endif
> + const char *cpuinfo_procs[] = CPUINFO_PROC;
> + unsigned int i;
> +
> + for (i = 0; i < ARRAY_SIZE(cpuinfo_procs); i++) {
> + int ret;
> + ret = __write_cpudesc(fd, cpuinfo_procs[i]);
> + if (ret >= 0)
> + return ret;
> + }
> + return -1;
> +}
> +
> +
> static int write_nrcpus(int fd, struct perf_header *h __maybe_unused,
> struct perf_evlist *evlist __maybe_unused)
> {
--
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