lkml.org 
[lkml]   [2015]   [Jul]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH V2 1/6] perf,tools: save cpu max freq in perf header
On Fri, Jul 24, 2015 at 09:48:27AM -0400, kan.liang@intel.com wrote:

SNIP

> struct perf_header *h __maybe_unused,
> struct perf_evlist *evlist __maybe_unused)
> @@ -1158,6 +1168,11 @@ static void print_cpuid(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
> fprintf(fp, "# cpuid : %s\n", ph->env.cpuid);
> }
>
> +static void print_cpu_max_freq(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
> +{
> + fprintf(fp, "# CPU max frequency : %u MHz\n", ph->env.cpu_max_freq);
> +}
> +
> static void print_branch_stack(struct perf_header *ph __maybe_unused,
> int fd __maybe_unused, FILE *fp)
> {
> @@ -1471,6 +1486,25 @@ static int process_cpuid(struct perf_file_section *section __maybe_unused,
> return ph->env.cpuid ? 0 : -ENOMEM;
> }
>
> +static int process_cpu_max_freq(struct perf_file_section *section __maybe_unused,
> + struct perf_header *ph, int fd,
> + void *data __maybe_unused)
> +{
> + ssize_t ret;
> + u32 nr;
> +
> + ret = readn(fd, &nr, sizeof(nr));
> + if (ret != sizeof(nr))
> + return -1;
> +
> + if (ph->needs_swap)
> + nr = bswap_32(nr);
> +
> + ph->env.cpu_max_freq = nr;
> +
> + return 0;
> +}
> +
> static int process_total_mem(struct perf_file_section *section __maybe_unused,
> struct perf_header *ph, int fd,
> void *data __maybe_unused)
> @@ -1885,6 +1919,7 @@ static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
> FEAT_OPP(HEADER_NRCPUS, nrcpus),
> FEAT_OPP(HEADER_CPUDESC, cpudesc),
> FEAT_OPP(HEADER_CPUID, cpuid),
> + FEAT_OPP(HEADER_CPU_MAX_FREQ, cpu_max_freq),

I wonder we should start generic FEAT for CPU related data
stored in some expandable way tag-value or such

jirka


\
 
 \ /
  Last update: 2015-07-26 19:01    [W:0.126 / U:0.280 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site