cpupower: rapl monitor - shows the used power consumption in uj for each rapl domain

This CPU power monitor shows the power consumption as exposed by the powercap subsystem, cmp with:
Documentation/power/powercap/powercap.rst

cpupower monitor -m RAPL

  CPU| pack | core | unco
    0|6853926|967832|442381
    8|6853926|967832|442381
    1|6853926|967832|442381
    9|6853926|967832|442381

Unfortunately RAPL domains cannot be directly mapped to the corresponding CPU socket/package, core it belongs to.
Not sure this is possible at all with the current data exposed from the kernel.

Still it can be worthful information for developers trying to optimize power consumption of workloads or their system in general.

Signed-off-by Thomas Renninger <[email protected]>

CC Zhang Rui <[email protected]>

CC Shuah Khan <[email protected]>

---
  tools/power/cpupower/Makefile                 |   1 +
  .../utils/idle_monitor/cpupower-monitor.c     |   7 +-
  .../utils/idle_monitor/idle_monitors.def      |   1 +
  .../utils/idle_monitor/rapl_monitor.c         | 147 ++++++++++++++++++
  4 files changed, 153 insertions(+), 3 deletions(-)

create mode 100644 tools/power/cpupower/utils/idle_monitor/rapl_monitor.c

tools/power/cpupower/Makefile +1 -0

index 9fd3b309b3a6..59bfa05dec5d 100644
@@ -131,6 +131,7 @@ UTIL_OBJS =  utils/helpers/amd.o utils/helpers/msr.o \
  	utils/idle_monitor/hsw_ext_idle.o \
  	utils/idle_monitor/amd_fam14h_idle.o utils/idle_monitor/cpuidle_sysfs.o \
  	utils/idle_monitor/mperf_monitor.o utils/idle_monitor/cpupower-monitor.o \
+	utils/idle_monitor/rapl_monitor.o \
  	utils/cpupower.o utils/cpufreq-info.o utils/cpufreq-set.o \
  	utils/cpupower-set.o utils/cpupower-info.o utils/cpuidle-info.o \
  	utils/cpuidle-set.o utils/powercap-info.o

tools/power/cpupower/utils/idle_monitor/cpupower-monitor.c +4 -3

index 7c77045fef52..075e766ff1f3 100644
@@ -459,9 +459,10 @@ int cmd_monitor(int argc, char **argv)
  			print_results(1, cpu);
  	}
 
-	for (num = 0; num < avail_monitors; num++)
-		monitors[num]->unregister();
-
+	for (num = 0; num < avail_monitors; num++) {
+		if (monitors[num]->unregister)
+			monitors[num]->unregister();
+	}
  	cpu_topology_release(cpu_top);
  	return 0;
  }

tools/power/cpupower/utils/idle_monitor/idle_monitors.def +1 -0

index 0d6ba4dbb9c7..7c926e90c87e 100644
@@ -4,5 +4,6 @@ DEF(intel_nhm)
  DEF(intel_snb)
  DEF(intel_hsw_ext)
  DEF(mperf)
+DEF(rapl)
  #endif
  DEF(cpuidle_sysfs)

tools/power/cpupower/utils/idle_monitor/rapl_monitor.c new file +0 -0

new file mode 100644
index 000000000000..1acadf5ef90e