linux-kernel - Re: [PATCH 05/15] perf tools: Introduce perf_mem__tlb

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Date:	Wed, 24 Feb 2016 10:18:40 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Jiri Olsa <jolsa@...nel.org>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Stephane Eranian <eranian@...gle.com>,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 05/15] perf tools: Introduce perf_mem__tlb_scnprintf
 function

Em Wed, Feb 24, 2016 at 09:46:46AM +0100, Jiri Olsa escreveu:
> Move meminfo's tlb display function into mem-events.c
> object, so it could be reused later from script code.
> 
> Link: http://lkml.kernel.org/n/tip-kdsvxdm3ucwknyvkluwavydh@git.kernel.org
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> ---
>  tools/perf/util/mem-events.c | 47 ++++++++++++++++++++++++++++++++++++++++++++
>  tools/perf/util/mem-events.h |  3 +++
>  tools/perf/util/sort.c       | 44 ++---------------------------------------
>  3 files changed, 52 insertions(+), 42 deletions(-)

Applied, with minimal adjusts due to other patch not being applied.

- Arnaldo
 
> diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c
> index 3772a3a8a6ee..08c35dd7e335 100644
> --- a/tools/perf/util/mem-events.c
> +++ b/tools/perf/util/mem-events.c
> @@ -8,6 +8,7 @@
>  #include <api/fs/fs.h>
>  #include "mem-events.h"
>  #include "debug.h"
> +#include "symbol.h"
>  
>  unsigned int perf_mem_events__loads_ldlat = 30;
>  
> @@ -98,3 +99,49 @@ int perf_mem_events__init(void)
>  
>  	return found ? 0 : -ENOENT;
>  }
> +
> +static const char * const tlb_access[] = {
> +	"N/A",
> +	"HIT",
> +	"MISS",
> +	"L1",
> +	"L2",
> +	"Walker",
> +	"Fault",
> +};
> +
> +void perf_mem__tlb_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
> +{
> +	size_t l = 0, i;
> +	u64 m = PERF_MEM_TLB_NA;
> +	u64 hit, miss;
> +
> +	sz -= 1; /* -1 for null termination */
> +	out[0] = '\0';
> +
> +	if (mem_info)
> +		m = mem_info->data_src.mem_dtlb;
> +
> +	hit = m & PERF_MEM_TLB_HIT;
> +	miss = m & PERF_MEM_TLB_MISS;
> +
> +	/* already taken care of */
> +	m &= ~(PERF_MEM_TLB_HIT|PERF_MEM_TLB_MISS);
> +
> +	for (i = 0; m && i < ARRAY_SIZE(tlb_access); i++, m >>= 1) {
> +		if (!(m & 0x1))
> +			continue;
> +		if (l) {
> +			strcat(out, " or ");
> +			l += 4;
> +		}
> +		strncat(out, tlb_access[i], sz - l);
> +		l += strlen(tlb_access[i]);
> +	}
> +	if (*out == '\0')
> +		strcpy(out, "N/A");
> +	if (hit)
> +		strncat(out, " hit", sz - l);
> +	if (miss)
> +		strncat(out, " miss", sz - l);
> +}
> diff --git a/tools/perf/util/mem-events.h b/tools/perf/util/mem-events.h
> index 4ab437291589..b5067361a11c 100644
> --- a/tools/perf/util/mem-events.h
> +++ b/tools/perf/util/mem-events.h
> @@ -24,4 +24,7 @@ int perf_mem_events__parse(const char *str);
>  int perf_mem_events__init(void);
>  
>  char *perf_mem_events__name(int i);
> +
> +struct mem_info;
> +void perf_mem__tlb_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
>  #endif /* __PERF_MEM_EVENTS_H */
> diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
> index 5388f7940474..160df202c34f 100644
> --- a/tools/perf/util/sort.c
> +++ b/tools/perf/util/sort.c
> @@ -6,6 +6,7 @@
>  #include "evsel.h"
>  #include "evlist.h"
>  #include <traceevent/event-parse.h>
> +#include "mem-events.h"
>  
>  regex_t		parent_regex;
>  const char	default_parent_pattern[] = "^sys_|^do_page_fault";
> @@ -829,53 +830,12 @@ sort__tlb_cmp(struct hist_entry *left, struct hist_entry *right)
>  	return (int64_t)(data_src_r.mem_dtlb - data_src_l.mem_dtlb);
>  }
>  
> -static const char * const tlb_access[] = {
> -	"N/A",
> -	"HIT",
> -	"MISS",
> -	"L1",
> -	"L2",
> -	"Walker",
> -	"Fault",
> -};
> -
>  static int hist_entry__tlb_snprintf(struct hist_entry *he, char *bf,
>  				    size_t size, unsigned int width)
>  {
>  	char out[64];
> -	size_t sz = sizeof(out) - 1; /* -1 for null termination */
> -	size_t l = 0, i;
> -	u64 m = PERF_MEM_TLB_NA;
> -	u64 hit, miss;
> -
> -	out[0] = '\0';
> -
> -	if (he->mem_info)
> -		m = he->mem_info->data_src.mem_dtlb;
> -
> -	hit = m & PERF_MEM_TLB_HIT;
> -	miss = m & PERF_MEM_TLB_MISS;
> -
> -	/* already taken care of */
> -	m &= ~(PERF_MEM_TLB_HIT|PERF_MEM_TLB_MISS);
> -
> -	for (i = 0; m && i < ARRAY_SIZE(tlb_access); i++, m >>= 1) {
> -		if (!(m & 0x1))
> -			continue;
> -		if (l) {
> -			strcat(out, " or ");
> -			l += 4;
> -		}
> -		strncat(out, tlb_access[i], sz - l);
> -		l += strlen(tlb_access[i]);
> -	}
> -	if (*out == '\0')
> -		strcpy(out, "N/A");
> -	if (hit)
> -		strncat(out, " hit", sz - l);
> -	if (miss)
> -		strncat(out, " miss", sz - l);
>  
> +	perf_mem__tlb_scnprintf(out, sizeof(out), he->mem_info);
>  	return repsep_snprintf(bf, size, "%-*s", width, out);
>  }
>  
> -- 
> 2.4.3