tools/power turbostat: add --cpu parameter

With the --cpu parameter, turbostat prints only lines
for the specified set of CPUs:

sudo ./turbostat --quiet --show Core,CPU --cpu 0,1,3..5,6-7
	Core	CPU
	-	-
	0	0
	0	4
	1	1
	1	5
	2	6
	3	3
	3	7

Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/tools/power/x86/turbostat/turbostat.8 b/tools/power/x86/turbostat/turbostat.8
index e31b721..efe6a71 100644 (file)
--- a/tools/power/x86/turbostat/turbostat.8
+++ b/tools/power/x86/turbostat/turbostat.8
@@ -47,6 +47,8 @@ name as necessary to disambiguate it from others is necessary.  Note that option
                default: delta
 .fi
 .PP
+\fB--cpu cpu-set\fP limit output to system summary plus the specified cpu-set.  cpu-set is a comma delimited list of cpu ranges. cpu ranges can be individual cpu numbers or start and end numbers, separated by ".." or '-'.  eg. 1,2,8,14..17,21-44
+.PP
 \fB--hide column\fP do not show the specified columns.  May be invoked multiple times, or with a comma-separated list of column names.  Use "--hide sysfs" to hide the sysfs statistics columns as a group.
 .PP
 \fB--show column\fP show only the specified columns.  May be invoked multiple times, or with a comma-separated list of column names.  Use "--show sysfs" to show the sysfs statistics columns as a group.

diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index eb6cc8c..8c965bb 100644 (file)
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -143,8 +143,9 @@ unsigned int has_misc_feature_control;
 int backwards_count;
 char *progname;
 
-cpu_set_t *cpu_present_set, *cpu_affinity_set;
-size_t cpu_present_setsize, cpu_affinity_setsize;
+#define CPU_SUBSET_MAXCPUS     1024    /* need to use before probe... */
+cpu_set_t *cpu_present_set, *cpu_affinity_set, *cpu_subset;
+size_t cpu_present_setsize, cpu_affinity_setsize, cpu_subset_size;
 #define MAX_ADDED_COUNTERS 16
 
 struct thread_data {
@@ -700,6 +701,11 @@ int format_counters(struct thread_data *t, struct core_data *c,
        if (show_pkg_only && !(t->flags & CPU_IS_FIRST_CORE_IN_PACKAGE))
                return 0;
 
+       /*if not summary line and --cpu is used */
+       if ((t != &average.threads) &&
+               (cpu_subset && !CPU_ISSET_S(t->cpu_id, cpu_subset_size, cpu_subset)))
+               return 0;
+
        interval_float = tv_delta.tv_sec + tv_delta.tv_usec/1000000.0;
 
        tsc = t->tsc * tsc_tweak;
@@ -4096,6 +4102,7 @@ void help()
        "to print statistics, until interrupted.\n"
        "--add          add a counter\n"
        "               eg. --add msr0x10,u64,cpu,delta,MY_TSC\n"
+       "--cpu  cpu-set limit output to summary plus cpu-set cpu-set\n"
        "--quiet        skip decoding system configuration header\n"
        "--interval sec Override default 5-second measurement interval\n"
        "--help         print this help message\n"
@@ -4159,6 +4166,15 @@ void topology_probe()
        for_all_proc_cpus(mark_cpu_present);
 
        /*
+        * Validate that all cpus in cpu_subset are also in cpu_present_set
+        */
+       for (i = 0; i < CPU_SUBSET_MAXCPUS; ++i) {
+               if (CPU_ISSET_S(i, cpu_subset_size, cpu_subset))
+                       if (!CPU_ISSET_S(i, cpu_present_setsize, cpu_present_set))
+                               err(1, "cpu%d not present", i);
+       }
+
+       /*
         * Allocate and initialize cpu_affinity_set
         */
        cpu_affinity_set = CPU_ALLOC((topo.max_cpu_num + 1));
@@ -4675,6 +4691,77 @@ void probe_sysfs(void)
 
 }
 
+
+/*
+ * parse cpuset with following syntax
+ * 1,2,4..6,8-10 and set bits in cpu_subset
+ */
+void parse_cpu_command(char *optarg)
+{
+       unsigned int start, end;
+       char *next;
+
+       cpu_subset = CPU_ALLOC(CPU_SUBSET_MAXCPUS);
+       if (cpu_subset == NULL)
+               err(3, "CPU_ALLOC");
+       cpu_subset_size = CPU_ALLOC_SIZE(CPU_SUBSET_MAXCPUS);
+
+       CPU_ZERO_S(cpu_subset_size, cpu_subset);
+
+       next = optarg;
+
+       while (next && *next) {
+
+               if (*next == '-')       /* no negative cpu numbers */
+                       goto error;
+
+               start = strtoul(next, &next, 10);
+
+               if (start >= CPU_SUBSET_MAXCPUS)
+                       goto error;
+               CPU_SET_S(start, cpu_subset_size, cpu_subset);
+
+               if (*next == '\0')
+                       break;
+
+               if (*next == ',') {
+                       next += 1;
+                       continue;
+               }
+
+               if (*next == '-') {
+                       next += 1;      /* start range */
+               } else if (*next == '.') {
+                       next += 1;
+                       if (*next == '.')
+                               next += 1;      /* start range */
+                       else
+                               goto error;
+               }
+
+               end = strtoul(next, &next, 10);
+               if (end <= start)
+                       goto error;
+
+               while (++start <= end) {
+                       if (start >= CPU_SUBSET_MAXCPUS)
+                               goto error;
+                       CPU_SET_S(start, cpu_subset_size, cpu_subset);
+               }
+
+               if (*next == ',')
+                       next += 1;
+               else if (*next != '\0')
+                       goto error;
+       }
+
+       return;
+
+error:
+       fprintf(stderr, "'--cpu %s' malformed\n", optarg);
+       exit(-1);
+}
+
 /*
  * HIDE_LIST - hide this list of counters, show the rest [default]
  * SHOW_LIST - show this list of counters, hide the rest
@@ -4716,6 +4803,7 @@ void cmdline(int argc, char **argv)
        int option_index = 0;
        static struct option long_options[] = {
                {"add",         required_argument,      0, 'a'},
+               {"cpu",         required_argument,      0, 'c'},
                {"Dump",        no_argument,            0, 'D'},
                {"debug",       no_argument,            0, 'd'},        /* internal, not documented */
                {"interval",    required_argument,      0, 'i'},
@@ -4741,6 +4829,9 @@ void cmdline(int argc, char **argv)
                case 'a':
                        parse_add_command(optarg);
                        break;
+               case 'c':
+                       parse_cpu_command(optarg);
+                       break;
                case 'D':
                        dump_only++;
                        break;