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Subject[PATCH v3] Fix header-name to read state name and adjust column width
Date
The names of the idle states in the output of cpupower monitor command are
truncated to 4 characters. Hence, On POWER9, since the states are named
"stop0, stop1, stop2, stop4, stop11", this output is ambiguous

root:~# cpupower monitor
|Idle_Stats
PKG |CORE|CPU | snoo | stop | stop
0| 8| 0| 0.00| 0.00| 2.79
0| 8| 1| 0.00| 0.00| 70.68

In this patch, we modify the output to print the state name
and adjust the column width, that results in a legible output.

root:~#cpupower monitor
|Idle_Stats
PKG |CORE|CPU |snooze|stop0_li|stop1_li
0| 8| 0| 0.00| 0.00| 60.04
0| 8| 1| 0.00| 0.00| 38.97
0| 8| 2| 0.00| 0.00| 0.00
0| 8| 3| 0.00| 0.00| 0.00
0| 12| 4| 0.00| 0.00| 99.25
0| 12| 5| 0.00| 0.00| 0.00
0| 12| 6| 0.00| 0.00| 99.71
0| 12| 7| 0.00| 0.00| 99.85
8|2048| 8| 0.00| 0.00| 54.66
8|2048| 9| 0.00| 0.00| 0.00
8|2048| 10| 0.00| 0.00| 0.00
8|2048| 11| 0.00| 0.00| 97.83
8|2052| 12| 0.00| 0.00| 0.00
8|2052| 13| 0.00| 0.00| 0.00
8|2052| 14| 0.00| 0.00| 1.99
8|2052| 15| 0.00| 0.00| 99.87

Tested on POWER8, POWER9 and x86.

Signed-off-by: Seeteena Thoufeek <s1seetee@linux.vnet.ibm.com>
---
.../cpupower/utils/idle_monitor/cpupower-monitor.c | 62 +++++++++++++++-------
.../cpupower/utils/idle_monitor/cpupower-monitor.h | 6 ++-
2 files changed, 47 insertions(+), 21 deletions(-)

diff --git a/tools/power/cpupower/utils/idle_monitor/cpupower-monitor.c b/tools/power/cpupower/utils/idle_monitor/cpupower-monitor.c
index 05f953f..949b3bc 100644
--- a/tools/power/cpupower/utils/idle_monitor/cpupower-monitor.c
+++ b/tools/power/cpupower/utils/idle_monitor/cpupower-monitor.c
@@ -21,6 +21,10 @@
#include "idle_monitor/cpupower-monitor.h"
#include "idle_monitor/idle_monitors.h"
#include "helpers/helpers.h"
+#define xstr(s) str(s)
+#define str(s) #s
+#define COL_WIDTH_MIN 6
+#define COL_WIDTH_MAX 8

/* Define pointers to all monitors. */
#define DEF(x) & x ## _monitor ,
@@ -85,7 +89,7 @@ int fill_string_with_spaces(char *s, int n)
void print_header(int topology_depth)
{
int unsigned mon;
- int state, need_len;
+ int state, need_len, name_len;
cstate_t s;
char buf[128] = "";
int percent_width = 4;
@@ -116,17 +120,19 @@ void print_header(int topology_depth)
for (mon = 0; mon < avail_monitors; mon++) {
if (mon != 0)
printf("|| ");
- else
- 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);
+ name_len = strlen(s.name);
+ if (name_len <= COL_WIDTH_MIN)
+ percent_width = COL_WIDTH_MIN;
+ else
+ percent_width = COL_WIDTH_MAX;
+ sprintf(buf, "%.*s", percent_width, s.name);
fill_string_with_spaces(buf, percent_width);
printf("%s", buf);
}
- printf(" ");
}
printf("\n");
}
@@ -134,12 +140,12 @@ void print_header(int topology_depth)

void print_results(int topology_depth, int cpu)
{
- unsigned int mon;
- int state, ret;
+ unsigned int mon, percent_width, name_len, width;
+ int state, ret, i;
double percent;
unsigned long long result;
cstate_t s;
-
+ char buf[128] = "";
/* Be careful CPUs may got resorted for pkg value do not just use cpu */
if (!bitmask_isbitset(cpus_chosen, cpu_top.core_info[cpu].cpu))
return;
@@ -163,23 +160,37 @@ void print_results(int topology_depth, int cpu)
printf("|");

s = monitors[mon]->hw_states[state];
-
+ name_len = strlen(s.name);
+ if (name_len > COL_WIDTH_MIN) {
+ percent_width = COL_WIDTH_MAX;
+ width = percent_width - COL_WIDTH_MIN;
+ fill_string_with_spaces(buf, width);
+ printf("%s", buf);
+ }
if (s.get_count_percent) {
ret = s.get_count_percent(s.id, &percent,
cpu_top.core_info[cpu].cpu);
- if (ret)
- printf("******");
- else if (percent >= 100.0)
- printf("%6.1f", percent);
- else
- printf("%6.2f", percent);
+ if (ret) {
+ for (i = 0; i < COL_WIDTH_MIN; i++)
+ printf("*");
+ } else if (percent >= 100.0) {
+ printf("%"xstr(COL_WIDTH_MIN)".1f",
+ percent);
+ }
+ else {
+ printf("%"xstr(COL_WIDTH_MIN)".2f",
+ percent);
+ }
} else if (s.get_count) {
ret = s.get_count(s.id, &result,
cpu_top.core_info[cpu].cpu);
- if (ret)
- printf("******");
- else
- printf("%6llu", result);
+ if (ret) {
+ for (i = 0; i < COL_WIDTH_MIN; i++)
+ printf("*");
+ } else {
+ printf("%"xstr(COL_WIDTH_MIN)"llu",
+ result);
+ }
} else {
printf(_("Monitor %s, Counter %s has no count "
"function. Implementation error\n"),
diff --git a/tools/power/cpupower/utils/idle_monitor/cpupower-monitor.h b/tools/power/cpupower/utils/idle_monitor/cpupower-monitor.h
index 9e43f33..f6dcb9f 100644
--- a/tools/power/cpupower/utils/idle_monitor/cpupower-monitor.h
+++ b/tools/power/cpupower/utils/idle_monitor/cpupower-monitor.h
@@ -15,7 +15,11 @@

#define MONITORS_MAX 20
#define MONITOR_NAME_LEN 20
-#define CSTATE_NAME_LEN 5
+/*
+ * CSTATE_NAME_LEN is limited by the CPUIDLE_NAME_LEN defined
+ * in include/linux/cpuidle.h.
+ */
+#define CSTATE_NAME_LEN 16
#define CSTATE_DESC_LEN 60

int cpu_count;
--
1.8.3.1
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