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Date: Tue, 29 May 2018 10:55:53 -0600
From: Shuah Khan <shuah@...nel.org>
To: Abhishek Goel <huntbag@...ux.vnet.ibm.com>, trenn@...e.com,
linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: s1seetee@...ux.vnet.ibm.com, Shuah Khan <shuah@...nel.org>
Subject: Re: [PATCH] cpupower : Fix header name to read idle state name
On 05/28/2018 05:03 AM, Abhishek Goel wrote:
> The names of the idle states in the output of cpupower monitor command are
> truncated to 4 characters. On POWER9, this creates ambiguity as the states
> are named "stop0", "stop1", etc.
>
> root:~# cpupower monitor
> |Idle_Stats
> PKG |CORE|CPU | snoo | stop | stop | stop | stop | stop | stop
> 0| 0| 0| 0.00| 0.00| 0.00| 0.00| 0.00| 0.00| 1.90
> 0| 0| 1| 0.00| 0.00| 0.00| 0.00| 0.00| 0.00| 0.00
> 0| 0| 2| 0.00| 0.00| 0.00| 0.00| 0.00| 0.00| 0.00
> 0| 0| 3| 0.00| 0.00| 0.00| 0.00| 0.00| 0.00| 0.00
>
> This patch modifies the output to print the state name that results in a
> legible output. The names will be printed with atmost 1 padding in left.
>
> root:~# cpupower monitor
> | Idle_Stats
> PKG|CORE| CPU|snooze|stop0L| stop0|stop1L| stop1|stop2L| stop2
> 0| 0| 0| 0.00| 0.00| 0.00| 0.00| 0.00| 0.00| 0.72
> 0| 0| 1| 0.00| 0.00| 0.00| 0.00| 0.00| 0.00| 0.00
> 0| 0| 2| 0.00| 0.00| 0.00| 0.00| 0.00| 0.00| 0.00
> 0| 0| 3| 0.00| 0.00| 0.00| 0.00| 0.00| 0.00| 0.00
>
> This patch does not affect the output for intel.
> Output for intel before applying the patch:
>
> root:~# cpupower monitor
> |Idle_Stats
> CPU | POLL | C1-S | C1E- | C3-S | C6-S | C7s- | C8-S | C9-S | C10-
> 0| 0.00| 0.14| 0.39| 0.35| 7.41| 0.00| 17.67| 1.01| 70.03
> 2| 0.00| 0.19| 0.47| 0.10| 6.50| 0.00| 29.66| 2.17| 58.07
> 1| 0.00| 0.11| 0.50| 1.50| 9.11| 0.18| 18.19| 0.40| 66.63
> 3| 0.00| 0.67| 0.42| 0.03| 5.84| 0.00| 12.58| 0.77| 77.14
>
> Output for intel after applying the patch:
>
> root:~# cpupower monitor
> | Idle_Stats
> CPU| POLL | C1-S | C1E- | C3-S | C6-S | C7s- | C8-S | C9-S | C10-
> 0| 0.03| 0.33| 1.01| 0.27| 3.03| 0.00| 19.18| 0.00| 71.24
> 2| 0.00| 1.58| 0.58| 0.42| 8.55| 0.09| 21.11| 0.99| 63.32
> 1| 0.00| 1.26| 0.88| 0.43| 9.00| 0.02| 7.78| 4.65| 71.91
> 3| 0.00| 0.30| 0.42| 0.06| 13.62| 0.21| 30.29| 0.00| 52.45
>
> Signed-off-by: Abhishek Goel <huntbag@...ux.vnet.ibm.com>
> ---
>
> Previous attempt was made by Seeteena Thoufeek. This is the patch list
> link: https://patchwork.kernel.org/project/linux-pm/list/?submitter=
> 172041&state=*&archive=both
>
> .../utils/idle_monitor/cpuidle_sysfs.c | 15 ++++++++
> .../utils/idle_monitor/cpupower-monitor.c | 35 +++++++++++--------
> .../utils/idle_monitor/cpupower-monitor.h | 9 +++++
> 3 files changed, 44 insertions(+), 15 deletions(-)
>
> diff --git a/tools/power/cpupower/utils/idle_monitor/cpuidle_sysfs.c b/tools/power/cpupower/utils/idle_monitor/cpuidle_sysfs.c
> index 5b3205f16217..5b8c4956ff9a 100644
> --- a/tools/power/cpupower/utils/idle_monitor/cpuidle_sysfs.c
> +++ b/tools/power/cpupower/utils/idle_monitor/cpuidle_sysfs.c
> @@ -126,6 +126,20 @@ void fix_up_intel_idle_driver_name(char *tmp, int num)
> }
> }
>
> +#ifdef __powerpc__
> +void map_power_idle_state_name(char *tmp)
> +{
> + if (!strncmp(tmp, "stop0_lite", CSTATE_NAME_LEN))
> + strcpy(tmp, "stop0L");
> + else if (!strncmp(tmp, "stop1_lite", CSTATE_NAME_LEN))
> + strcpy(tmp, "stop1L");
> + else if (!strncmp(tmp, "stop2_lite", CSTATE_NAME_LEN))
> + strcpy(tmp, "stop2L");
> +}
> +#else
> +void map_power_idle_state_name(char *tmp) { }
> +#endif
> +
> static struct cpuidle_monitor *cpuidle_register(void)
> {
> int num;
> @@ -145,6 +159,7 @@ static struct cpuidle_monitor *cpuidle_register(void)
> if (tmp == NULL)
> continue;
>
> + map_power_idle_state_name(tmp);
> fix_up_intel_idle_driver_name(tmp, num);
> strncpy(cpuidle_cstates[num].name, tmp, CSTATE_NAME_LEN - 1);
> free(tmp);
> diff --git a/tools/power/cpupower/utils/idle_monitor/cpupower-monitor.c b/tools/power/cpupower/utils/idle_monitor/cpupower-monitor.c
> index 05f953f0f0a0..051da0a7c454 100644
> --- a/tools/power/cpupower/utils/idle_monitor/cpupower-monitor.c
> +++ b/tools/power/cpupower/utils/idle_monitor/cpupower-monitor.c
> @@ -70,36 +70,43 @@ void print_n_spaces(int n)
> printf(" ");
> }
>
> -/* size of s must be at least n + 1 */
> +/*s is filled with left and right spaces
> + *to make its length atleast n+1
> + */
> int fill_string_with_spaces(char *s, int n)
> {
> + char *temp;
> int len = strlen(s);
> - if (len > n)
> +
> + if (len >= n)
> return -1;
> +
> + temp = malloc(sizeof(char) * (n+1));
> for (; len < n; len++)
> s[len] = ' ';
> s[len] = '\0';
> + snprintf(temp, n+1, " %s", s);
> + strcpy(s, temp);
> + free(temp);
> return 0;
> }
>
> +#define MAX_COL_WIDTH 6
> void print_header(int topology_depth)
> {
> int unsigned mon;
> int state, need_len;
> cstate_t s;
> char buf[128] = "";
> - int percent_width = 4;
>
> fill_string_with_spaces(buf, topology_depth * 5 - 1);
> printf("%s|", buf);
>
> for (mon = 0; mon < avail_monitors; mon++) {
> - need_len = monitors[mon]->hw_states_num * (percent_width + 3)
> + need_len = monitors[mon]->hw_states_num * (MAX_COL_WIDTH + 1)
> - 1;
> - if (mon != 0) {
> - printf("|| ");
> - need_len--;
> - }
> + if (mon != 0)
> + printf("||");
> sprintf(buf, "%s", monitors[mon]->name);
> fill_string_with_spaces(buf, need_len);
> printf("%s", buf);
> @@ -107,23 +114,21 @@ void print_header(int topology_depth)
> printf("\n");
>
> if (topology_depth > 2)
> - printf("PKG |");
> + printf(" PKG|");
> if (topology_depth > 1)
> printf("CORE|");
> if (topology_depth > 0)
> - printf("CPU |");
> + printf(" CPU|");
>
> for (mon = 0; mon < avail_monitors; mon++) {
> if (mon != 0)
> - printf("|| ");
> - else
> - printf(" ");
> + printf("||");
> for (state = 0; state < monitors[mon]->hw_states_num; state++) {
> if (state != 0)
> - printf(" | ");
> + printf("|");
> s = monitors[mon]->hw_states[state];
> sprintf(buf, "%s", s.name);
> - fill_string_with_spaces(buf, percent_width);
> + fill_string_with_spaces(buf, MAX_COL_WIDTH);
> printf("%s", buf);
> }
> printf(" ");
> diff --git a/tools/power/cpupower/utils/idle_monitor/cpupower-monitor.h b/tools/power/cpupower/utils/idle_monitor/cpupower-monitor.h
> index 9e43f3371fbc..2ae50b499e0a 100644
> --- a/tools/power/cpupower/utils/idle_monitor/cpupower-monitor.h
> +++ b/tools/power/cpupower/utils/idle_monitor/cpupower-monitor.h
> @@ -15,7 +15,16 @@
>
> #define MONITORS_MAX 20
> #define MONITOR_NAME_LEN 20
> +
> +/* CSTATE_NAME_LEN is limited by header field width defined
> + * in cpupower-monitor.c. Header field width is defined to be
> + * sum of percent width and two spaces for padding.
> + */
> +#ifdef __powerpc__
> +#define CSTATE_NAME_LEN 7
> +#else
> #define CSTATE_NAME_LEN 5
> +#endif
> #define CSTATE_DESC_LEN 60
>
> int cpu_count;
>
Thanks for the patch. Applied to
git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux.git cpupower
for 4.18-rc1
thanks,
-- Shuah
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