Merge branch 'linus' into x86/apic-cleanups

Conflicts:
	arch/x86/include/asm/io_apic.h

Merge reason: Resolve the conflict, update to a more recent -rc base

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 327 insertions, 204 deletions

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index a6b4d44f9502..02b2d8013a61 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -43,6 +43,7 @@
 #include "util/parse-options.h"
 #include "util/parse-events.h"
 #include "util/event.h"
+#include "util/evsel.h"
 #include "util/debug.h"
 #include "util/header.h"
 #include "util/cpumap.h"
@@ -52,6 +53,8 @@
 #include <math.h>
 #include <locale.h>
 
+#define DEFAULT_SEPARATOR       " "
+
 static struct perf_event_attr default_attrs[] = {
 
   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
@@ -69,25 +72,23 @@ static struct perf_event_attr default_attrs[] = {
 };
 
 static bool                     system_wide                     =  false;
-static int                      nr_cpus                         =  0;
+static struct cpu_map           *cpus;
 static int                      run_idx                         =  0;
 
 static int                      run_count                       =  1;
 static bool                     no_inherit                      = false;
 static bool                     scale                           =  true;
+static bool                     no_aggr                         = false;
 static pid_t                    target_pid                      = -1;
 static pid_t                    target_tid                      = -1;
-static pid_t                    *all_tids                       =  NULL;
-static int                      thread_num                      =  0;
+static struct thread_map        *threads;
 static pid_t                    child_pid                       = -1;
 static bool                     null_run                        =  false;
-static bool                     big_num                         =  false;
+static bool                     big_num                         =  true;
+static int                      big_num_opt                     =  -1;
 static const char               *cpu_list;
-
-
-static int                      *fd[MAX_NR_CPUS][MAX_COUNTERS];
-
-static int                      event_scaled[MAX_COUNTERS];
+static const char               *csv_sep                        = NULL;
+static bool                     csv_output                      = false;
 
 static volatile int done = 0;
 
@@ -96,6 +97,22 @@ struct stats
         double n, mean, M2;
 };
 
+struct perf_stat {
+        struct stats      res_stats[3];
+};
+
+static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
+{
+        evsel->priv = zalloc(sizeof(struct perf_stat));
+        return evsel->priv == NULL ? -ENOMEM : 0;
+}
+
+static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
+{
+        free(evsel->priv);
+        evsel->priv = NULL;
+}
+
 static void update_stats(struct stats *stats, u64 val)
 {
         double delta;
@@ -135,69 +152,38 @@ static double stddev_stats(struct stats *stats)
         return sqrt(variance_mean);
 }
 
-struct stats                    event_res_stats[MAX_COUNTERS][3];
-struct stats                    runtime_nsecs_stats;
+struct stats                    runtime_nsecs_stats[MAX_NR_CPUS];
+struct stats                    runtime_cycles_stats[MAX_NR_CPUS];
+struct stats                    runtime_branches_stats[MAX_NR_CPUS];
 struct stats                    walltime_nsecs_stats;
-struct stats                    runtime_cycles_stats;
-struct stats                    runtime_branches_stats;
 
-#define MATCH_EVENT(t, c, counter)                      \
-        (attrs[counter].type == PERF_TYPE_##t &&        \
-         attrs[counter].config == PERF_COUNT_##c)
-
-#define ERR_PERF_OPEN \
-"Error: counter %d, sys_perf_event_open() syscall returned with %d (%s)\n"
-
-static int create_perf_stat_counter(int counter)
+static int create_perf_stat_counter(struct perf_evsel *evsel)
 {
-        struct perf_event_attr *attr = attrs + counter;
-        int thread;
-        int ncreated = 0;
+        struct perf_event_attr *attr = &evsel->attr;
 
         if (scale)
                 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
                                     PERF_FORMAT_TOTAL_TIME_RUNNING;
 
-        if (system_wide) {
-                int cpu;
-
-                for (cpu = 0; cpu < nr_cpus; cpu++) {
-                        fd[cpu][counter][0] = sys_perf_event_open(attr,
-                                        -1, cpumap[cpu], -1, 0);
-                        if (fd[cpu][counter][0] < 0)
-                                pr_debug(ERR_PERF_OPEN, counter,
-                                         fd[cpu][counter][0], strerror(errno));
-                        else
-                                ++ncreated;
-                }
-        } else {
-                attr->inherit = !no_inherit;
-                if (target_pid == -1 && target_tid == -1) {
-                        attr->disabled = 1;
-                        attr->enable_on_exec = 1;
-                }
-                for (thread = 0; thread < thread_num; thread++) {
-                        fd[0][counter][thread] = sys_perf_event_open(attr,
-                                all_tids[thread], -1, -1, 0);
-                        if (fd[0][counter][thread] < 0)
-                                pr_debug(ERR_PERF_OPEN, counter,
-                                         fd[0][counter][thread],
-                                         strerror(errno));
-                        else
-                                ++ncreated;
-                }
+        if (system_wide)
+                return perf_evsel__open_per_cpu(evsel, cpus);
+
+        attr->inherit = !no_inherit;
+        if (target_pid == -1 && target_tid == -1) {
+                attr->disabled = 1;
+                attr->enable_on_exec = 1;
         }
 
-        return ncreated;
+        return perf_evsel__open_per_thread(evsel, threads);
 }
 
 /*
  * Does the counter have nsecs as a unit?
  */
-static inline int nsec_counter(int counter)
+static inline int nsec_counter(struct perf_evsel *evsel)
 {
-        if (MATCH_EVENT(SOFTWARE, SW_CPU_CLOCK, counter) ||
-            MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter))
+        if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
+            perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
                 return 1;
 
         return 0;
@@ -205,55 +191,19 @@ static inline int nsec_counter(int counter)
 
 /*
  * Read out the results of a single counter:
+ * aggregate counts across CPUs in system-wide mode
  */
-static void read_counter(int counter)
+static int read_counter_aggr(struct perf_evsel *counter)
 {
-        u64 count[3], single_count[3];
-        int cpu;
-        size_t res, nv;
-        int scaled;
-        int i, thread;
-
-        count[0] = count[1] = count[2] = 0;
-
-        nv = scale ? 3 : 1;
-        for (cpu = 0; cpu < nr_cpus; cpu++) {
-                for (thread = 0; thread < thread_num; thread++) {
-                        if (fd[cpu][counter][thread] < 0)
-                                continue;
-
-                        res = read(fd[cpu][counter][thread],
-                                        single_count, nv * sizeof(u64));
-                        assert(res == nv * sizeof(u64));
-
-                        close(fd[cpu][counter][thread]);
-                        fd[cpu][counter][thread] = -1;
-
-                        count[0] += single_count[0];
-                        if (scale) {
-                                count[1] += single_count[1];
-                                count[2] += single_count[2];
-                        }
-                }
-        }
-
-        scaled = 0;
-        if (scale) {
-                if (count[2] == 0) {
-                        event_scaled[counter] = -1;
-                        count[0] = 0;
-                        return;
-                }
+        struct perf_stat *ps = counter->priv;
+        u64 *count = counter->counts->aggr.values;
+        int i;
 
-                if (count[2] < count[1]) {
-                        event_scaled[counter] = 1;
-                        count[0] = (unsigned long long)
-                                ((double)count[0] * count[1] / count[2] + 0.5);
-                }
-        }
+        if (__perf_evsel__read(counter, cpus->nr, threads->nr, scale) < 0)
+                return -1;
 
         for (i = 0; i < 3; i++)
-                update_stats(&event_res_stats[counter][i], count[i]);
+                update_stats(&ps->res_stats[i], count[i]);
 
         if (verbose) {
                 fprintf(stderr, "%s: %Ld %Ld %Ld\n", event_name(counter),
@@ -263,26 +213,51 @@ static void read_counter(int counter)
         /*
          * Save the full runtime - to allow normalization during printout:
          */
-        if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter))
-                update_stats(&runtime_nsecs_stats, count[0]);
-        if (MATCH_EVENT(HARDWARE, HW_CPU_CYCLES, counter))
-                update_stats(&runtime_cycles_stats, count[0]);
-        if (MATCH_EVENT(HARDWARE, HW_BRANCH_INSTRUCTIONS, counter))
-                update_stats(&runtime_branches_stats, count[0]);
+        if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
+                update_stats(&runtime_nsecs_stats[0], count[0]);
+        if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
+                update_stats(&runtime_cycles_stats[0], count[0]);
+        if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
+                update_stats(&runtime_branches_stats[0], count[0]);
+
+        return 0;
+}
+
+/*
+ * Read out the results of a single counter:
+ * do not aggregate counts across CPUs in system-wide mode
+ */
+static int read_counter(struct perf_evsel *counter)
+{
+        u64 *count;
+        int cpu;
+
+        for (cpu = 0; cpu < cpus->nr; cpu++) {
+                if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
+                        return -1;
+
+                count = counter->counts->cpu[cpu].values;
+
+                if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
+                        update_stats(&runtime_nsecs_stats[cpu], count[0]);
+                if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
+                        update_stats(&runtime_cycles_stats[cpu], count[0]);
+                if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
+                        update_stats(&runtime_branches_stats[cpu], count[0]);
+        }
+
+        return 0;
 }
 
 static int run_perf_stat(int argc __used, const char **argv)
 {
         unsigned long long t0, t1;
+        struct perf_evsel *counter;
         int status = 0;
-        int counter, ncreated = 0;
         int child_ready_pipe[2], go_pipe[2];
         const bool forks = (argc > 0);
         char buf;
 
-        if (!system_wide)
-                nr_cpus = 1;
-
         if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
                 perror("failed to create pipes");
                 exit(1);
@@ -322,7 +297,7 @@ static int run_perf_stat(int argc __used, const char **argv)
                 }
 
                 if (target_tid == -1 && target_pid == -1 && !system_wide)
-                        all_tids[0] = child_pid;
+                        threads->map[0] = child_pid;
 
                 /*
                  * Wait for the child to be ready to exec.
@@ -334,16 +309,23 @@ static int run_perf_stat(int argc __used, const char **argv)
                 close(child_ready_pipe[0]);
         }
 
-        for (counter = 0; counter < nr_counters; counter++)
-                ncreated += create_perf_stat_counter(counter);
-
-        if (ncreated == 0) {
-                pr_err("No permission to collect %sstats.\n"
-                       "Consider tweaking /proc/sys/kernel/perf_event_paranoid.\n",
-                       system_wide ? "system-wide " : "");
-                if (child_pid != -1)
-                        kill(child_pid, SIGTERM);
-                return -1;
+        list_for_each_entry(counter, &evsel_list, node) {
+                if (create_perf_stat_counter(counter) < 0) {
+                        if (errno == -EPERM || errno == -EACCES) {
+                                error("You may not have permission to collect %sstats.\n"
+                                      "\t Consider tweaking"
+                                      " /proc/sys/kernel/perf_event_paranoid or running as root.",
+                                      system_wide ? "system-wide " : "");
+                        } else {
+                                error("open_counter returned with %d (%s). "
+                                      "/bin/dmesg may provide additional information.\n",
+                                       errno, strerror(errno));
+                        }
+                        if (child_pid != -1)
+                                kill(child_pid, SIGTERM);
+                        die("Not all events could be opened.\n");
+                        return -1;
+                }
         }
 
         /*
@@ -362,60 +344,97 @@ static int run_perf_stat(int argc __used, const char **argv)
 
         update_stats(&walltime_nsecs_stats, t1 - t0);
 
-        for (counter = 0; counter < nr_counters; counter++)
-                read_counter(counter);
+        if (no_aggr) {
+                list_for_each_entry(counter, &evsel_list, node) {
+                        read_counter(counter);
+                        perf_evsel__close_fd(counter, cpus->nr, 1);
+                }
+        } else {
+                list_for_each_entry(counter, &evsel_list, node) {
+                        read_counter_aggr(counter);
+                        perf_evsel__close_fd(counter, cpus->nr, threads->nr);
+                }
+        }
 
         return WEXITSTATUS(status);
 }
 
-static void print_noise(int counter, double avg)
+static void print_noise(struct perf_evsel *evsel, double avg)
 {
+        struct perf_stat *ps;
+
         if (run_count == 1)
                 return;
 
+        ps = evsel->priv;
         fprintf(stderr, "   ( +- %7.3f%% )",
-                        100 * stddev_stats(&event_res_stats[counter][0]) / avg);
+                        100 * stddev_stats(&ps->res_stats[0]) / avg);
 }
 
-static void nsec_printout(int counter, double avg)
+static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
 {
         double msecs = avg / 1e6;
+        char cpustr[16] = { '\0', };
+        const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-24s";
 
-        fprintf(stderr, " %18.6f  %-24s", msecs, event_name(counter));
+        if (no_aggr)
+                sprintf(cpustr, "CPU%*d%s",
+                        csv_output ? 0 : -4,
+                        cpus->map[cpu], csv_sep);
+
+        fprintf(stderr, fmt, cpustr, msecs, csv_sep, event_name(evsel));
+
+        if (csv_output)
+                return;
 
-        if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) {
+        if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
                 fprintf(stderr, " # %10.3f CPUs ",
                                 avg / avg_stats(&walltime_nsecs_stats));
-        }
 }
 
-static void abs_printout(int counter, double avg)
+static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
 {
         double total, ratio = 0.0;
+        char cpustr[16] = { '\0', };
+        const char *fmt;
+
+        if (csv_output)
+                fmt = "%s%.0f%s%s";
+        else if (big_num)
+                fmt = "%s%'18.0f%s%-24s";
+        else
+                fmt = "%s%18.0f%s%-24s";
 
-        if (big_num)
-                fprintf(stderr, " %'18.0f  %-24s", avg, event_name(counter));
+        if (no_aggr)
+                sprintf(cpustr, "CPU%*d%s",
+                        csv_output ? 0 : -4,
+                        cpus->map[cpu], csv_sep);
         else
-                fprintf(stderr, " %18.0f  %-24s", avg, event_name(counter));
+                cpu = 0;
+
+        fprintf(stderr, fmt, cpustr, avg, csv_sep, event_name(evsel));
 
-        if (MATCH_EVENT(HARDWARE, HW_INSTRUCTIONS, counter)) {
-                total = avg_stats(&runtime_cycles_stats);
+        if (csv_output)
+                return;
+
+        if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
+                total = avg_stats(&runtime_cycles_stats[cpu]);
 
                 if (total)
                         ratio = avg / total;
 
                 fprintf(stderr, " # %10.3f IPC  ", ratio);
-        } else if (MATCH_EVENT(HARDWARE, HW_BRANCH_MISSES, counter) &&
-                        runtime_branches_stats.n != 0) {
-                total = avg_stats(&runtime_branches_stats);
+        } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
+                        runtime_branches_stats[cpu].n != 0) {
+                total = avg_stats(&runtime_branches_stats[cpu]);
 
                 if (total)
                         ratio = avg * 100 / total;
 
                 fprintf(stderr, " # %10.3f %%    ", ratio);
 
-        } else if (runtime_nsecs_stats.n != 0) {
-                total = avg_stats(&runtime_nsecs_stats);
+        } else if (runtime_nsecs_stats[cpu].n != 0) {
+                total = avg_stats(&runtime_nsecs_stats[cpu]);
 
                 if (total)
                         ratio = 1000.0 * avg / total;
@@ -426,30 +445,38 @@ static void abs_printout(int counter, double avg)
 
 /*
  * Print out the results of a single counter:
+ * aggregated counts in system-wide mode
  */
-static void print_counter(int counter)
+static void print_counter_aggr(struct perf_evsel *counter)
 {
-        double avg = avg_stats(&event_res_stats[counter][0]);
-        int scaled = event_scaled[counter];
+        struct perf_stat *ps = counter->priv;
+        double avg = avg_stats(&ps->res_stats[0]);
+        int scaled = counter->counts->scaled;
 
         if (scaled == -1) {
-                fprintf(stderr, " %18s  %-24s\n",
-                        "<not counted>", event_name(counter));
+                fprintf(stderr, "%*s%s%-24s\n",
+                        csv_output ? 0 : 18,
+                        "<not counted>", csv_sep, event_name(counter));
                 return;
         }
 
         if (nsec_counter(counter))
-                nsec_printout(counter, avg);
+                nsec_printout(-1, counter, avg);
         else
-                abs_printout(counter, avg);
+                abs_printout(-1, counter, avg);
+
+        if (csv_output) {
+                fputc('\n', stderr);
+                return;
+        }
 
         print_noise(counter, avg);
 
         if (scaled) {
                 double avg_enabled, avg_running;
 
-                avg_enabled = avg_stats(&event_res_stats[counter][1]);
-                avg_running = avg_stats(&event_res_stats[counter][2]);
+                avg_enabled = avg_stats(&ps->res_stats[1]);
+                avg_running = avg_stats(&ps->res_stats[2]);
 
                 fprintf(stderr, "  (scaled from %.2f%%)",
                                 100 * avg_running / avg_enabled);
@@ -458,40 +485,92 @@ static void print_counter(int counter)
         fprintf(stderr, "\n");
 }
 
+/*
+ * Print out the results of a single counter:
+ * does not use aggregated count in system-wide
+ */
+static void print_counter(struct perf_evsel *counter)
+{
+        u64 ena, run, val;
+        int cpu;
+
+        for (cpu = 0; cpu < cpus->nr; cpu++) {
+                val = counter->counts->cpu[cpu].val;
+                ena = counter->counts->cpu[cpu].ena;
+                run = counter->counts->cpu[cpu].run;
+                if (run == 0 || ena == 0) {
+                        fprintf(stderr, "CPU%*d%s%*s%s%-24s",
+                                csv_output ? 0 : -4,
+                                cpus->map[cpu], csv_sep,
+                                csv_output ? 0 : 18,
+                                "<not counted>", csv_sep,
+                                event_name(counter));
+
+                        fprintf(stderr, "\n");
+                        continue;
+                }
+
+                if (nsec_counter(counter))
+                        nsec_printout(cpu, counter, val);
+                else
+                        abs_printout(cpu, counter, val);
+
+                if (!csv_output) {
+                        print_noise(counter, 1.0);
+
+                        if (run != ena) {
+                                fprintf(stderr, "  (scaled from %.2f%%)",
+                                        100.0 * run / ena);
+                        }
+                }
+                fprintf(stderr, "\n");
+        }
+}
+
 static void print_stat(int argc, const char **argv)
 {
-        int i, counter;
+        struct perf_evsel *counter;
+        int i;
 
         fflush(stdout);
 
-        fprintf(stderr, "\n");
-        fprintf(stderr, " Performance counter stats for ");
-        if(target_pid == -1 && target_tid == -1) {
-                fprintf(stderr, "\'%s", argv[0]);
-                for (i = 1; i < argc; i++)
-                        fprintf(stderr, " %s", argv[i]);
-        } else if (target_pid != -1)
-                fprintf(stderr, "process id \'%d", target_pid);
-        else
-                fprintf(stderr, "thread id \'%d", target_tid);
-
-        fprintf(stderr, "\'");
-        if (run_count > 1)
-                fprintf(stderr, " (%d runs)", run_count);
-        fprintf(stderr, ":\n\n");
+        if (!csv_output) {
+                fprintf(stderr, "\n");
+                fprintf(stderr, " Performance counter stats for ");
+                if(target_pid == -1 && target_tid == -1) {
+                        fprintf(stderr, "\'%s", argv[0]);
+                        for (i = 1; i < argc; i++)
+                                fprintf(stderr, " %s", argv[i]);
+                } else if (target_pid != -1)
+                        fprintf(stderr, "process id \'%d", target_pid);
+                else
+                        fprintf(stderr, "thread id \'%d", target_tid);
+
+                fprintf(stderr, "\'");
+                if (run_count > 1)
+                        fprintf(stderr, " (%d runs)", run_count);
+                fprintf(stderr, ":\n\n");
+        }
 
-        for (counter = 0; counter < nr_counters; counter++)
-                print_counter(counter);
+        if (no_aggr) {
+                list_for_each_entry(counter, &evsel_list, node)
+                        print_counter(counter);
+        } else {
+                list_for_each_entry(counter, &evsel_list, node)
+                        print_counter_aggr(counter);
+        }
 
-        fprintf(stderr, "\n");
-        fprintf(stderr, " %18.9f  seconds time elapsed",
-                        avg_stats(&walltime_nsecs_stats)/1e9);
-        if (run_count > 1) {
-                fprintf(stderr, "   ( +- %7.3f%% )",
+        if (!csv_output) {
+                fprintf(stderr, "\n");
+                fprintf(stderr, " %18.9f  seconds time elapsed",
+                                avg_stats(&walltime_nsecs_stats)/1e9);
+                if (run_count > 1) {
+                        fprintf(stderr, "   ( +- %7.3f%% )",
                                 100*stddev_stats(&walltime_nsecs_stats) /
                                 avg_stats(&walltime_nsecs_stats));
+                }
+                fprintf(stderr, "\n\n");
         }
-        fprintf(stderr, "\n\n");
 }
 
 static volatile int signr = -1;
@@ -521,6 +600,13 @@ static const char * const stat_usage[] = {
         NULL
 };
 
+static int stat__set_big_num(const struct option *opt __used,
+                             const char *s __used, int unset)
+{
+        big_num_opt = unset ? 0 : 1;
+        return 0;
+}
+
 static const struct option options[] = {
         OPT_CALLBACK('e', "event", NULL, "event",
                      "event selector. use 'perf list' to list available events",
@@ -541,64 +627,96 @@ static const struct option options[] = {
                     "repeat command and print average + stddev (max: 100)"),
         OPT_BOOLEAN('n', "null", &null_run,
                     "null run - dont start any counters"),
-        OPT_BOOLEAN('B', "big-num", &big_num,
-                    "print large numbers with thousands\' separators"),
+        OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL, 
+                           "print large numbers with thousands\' separators",
+                           stat__set_big_num),
         OPT_STRING('C', "cpu", &cpu_list, "cpu",
                     "list of cpus to monitor in system-wide"),
+        OPT_BOOLEAN('A', "no-aggr", &no_aggr,
+                    "disable CPU count aggregation"),
+        OPT_STRING('x', "field-separator", &csv_sep, "separator",
+                   "print counts with custom separator"),
         OPT_END()
 };
 
 int cmd_stat(int argc, const char **argv, const char *prefix __used)
 {
-        int status;
-        int i,j;
+        struct perf_evsel *pos;
+        int status = -ENOMEM;
 
         setlocale(LC_ALL, "");
 
         argc = parse_options(argc, argv, options, stat_usage,
                 PARSE_OPT_STOP_AT_NON_OPTION);
+
+        if (csv_sep)
+                csv_output = true;
+        else
+                csv_sep = DEFAULT_SEPARATOR;
+
+        /*
+         * let the spreadsheet do the pretty-printing
+         */
+        if (csv_output) {
+                /* User explicitely passed -B? */
+                if (big_num_opt == 1) {
+                        fprintf(stderr, "-B option not supported with -x\n");
+                        usage_with_options(stat_usage, options);
+                } else /* Nope, so disable big number formatting */
+                        big_num = false;
+        } else if (big_num_opt == 0) /* User passed --no-big-num */
+                big_num = false;
+
         if (!argc && target_pid == -1 && target_tid == -1)
                 usage_with_options(stat_usage, options);
         if (run_count <= 0)
                 usage_with_options(stat_usage, options);
 
+        /* no_aggr is for system-wide only */
+        if (no_aggr && !system_wide)
+                usage_with_options(stat_usage, options);
+
         /* Set attrs and nr_counters if no event is selected and !null_run */
         if (!null_run && !nr_counters) {
-                memcpy(attrs, default_attrs, sizeof(default_attrs));
+                size_t c;
+
                 nr_counters = ARRAY_SIZE(default_attrs);
+
+                for (c = 0; c < ARRAY_SIZE(default_attrs); ++c) {
+                        pos = perf_evsel__new(default_attrs[c].type,
+                                              default_attrs[c].config,
+                                              nr_counters);
+                        if (pos == NULL)
+                                goto out;
+                        list_add(&pos->node, &evsel_list);
+                }
         }
 
-        if (system_wide)
-                nr_cpus = read_cpu_map(cpu_list);
-        else
-                nr_cpus = 1;
+        if (target_pid != -1)
+                target_tid = target_pid;
 
-        if (nr_cpus < 1)
+        threads = thread_map__new(target_pid, target_tid);
+        if (threads == NULL) {
+                pr_err("Problems finding threads of monitor\n");
                 usage_with_options(stat_usage, options);
+        }
 
-        if (target_pid != -1) {
-                target_tid = target_pid;
-                thread_num = find_all_tid(target_pid, &all_tids);
-                if (thread_num <= 0) {
-                        fprintf(stderr, "Can't find all threads of pid %d\n",
-                                        target_pid);
-                        usage_with_options(stat_usage, options);
-                }
-        } else {
-                all_tids=malloc(sizeof(pid_t));
-                if (!all_tids)
-                        return -ENOMEM;
+        if (system_wide)
+                cpus = cpu_map__new(cpu_list);
+        else
+                cpus = cpu_map__dummy_new();
 
-                all_tids[0] = target_tid;
-                thread_num = 1;
+        if (cpus == NULL) {
+                perror("failed to parse CPUs map");
+                usage_with_options(stat_usage, options);
+                return -1;
         }
 
-        for (i = 0; i < MAX_NR_CPUS; i++) {
-                for (j = 0; j < MAX_COUNTERS; j++) {
-                        fd[i][j] = malloc(sizeof(int)*thread_num);
-                        if (!fd[i][j])
-                                return -ENOMEM;
-                }
+        list_for_each_entry(pos, &evsel_list, node) {
+                if (perf_evsel__alloc_stat_priv(pos) < 0 ||
+                    perf_evsel__alloc_counts(pos, cpus->nr) < 0 ||
+                    perf_evsel__alloc_fd(pos, cpus->nr, threads->nr) < 0)
+                        goto out_free_fd;
         }
 
         /*
@@ -621,6 +739,11 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used)
 
         if (status != -1)
                 print_stat(argc, argv);
-
+out_free_fd:
+        list_for_each_entry(pos, &evsel_list, node)
+                perf_evsel__free_stat_priv(pos);
+out:
+        thread_map__delete(threads);
+        threads = NULL;
         return status;
 }