Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (311 commits)
  perf tools: Add mode to build without newt support
  perf symbols: symbol inconsistency message should be done only at verbose=1
  perf tui: Add explicit -lslang option
  perf options: Type check all the remaining OPT_ variants
  perf options: Type check OPT_BOOLEAN and fix the offenders
  perf options: Check v type in OPT_U?INTEGER
  perf options: Introduce OPT_UINTEGER
  perf tui: Add workaround for slang < 2.1.4
  perf record: Fix bug mismatch with -c option definition
  perf options: Introduce OPT_U64
  perf tui: Add help window to show key associations
  perf tui: Make <- exit menus too
  perf newt: Add single key shortcuts for zoom into DSO and threads
  perf newt: Exit browser unconditionally when CTRL+C, q or Q is pressed
  perf newt: Fix the 'A'/'a' shortcut for annotate
  perf newt: Make <- exit the ui_browser
  x86, perf: P4 PMU - fix counters management logic
  perf newt: Make <- zoom out filters
  perf report: Report number of events, not samples
  perf hist: Clarify events_stats fields usage
  ...

Fix up trivial conflicts in kernel/fork.c and tools/perf/builtin-record.c

1 files changed, 207 insertions, 91 deletions

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 1f529321607e..397290a0a76e 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -55,9 +55,9 @@
 #include <linux/unistd.h>
 #include <linux/types.h>
 
-static int                      fd[MAX_NR_CPUS][MAX_COUNTERS];
+static int                      *fd[MAX_NR_CPUS][MAX_COUNTERS];
 
-static int                      system_wide                     =      0;
+static bool                     system_wide                     =  false;
 
 static int                      default_interval                =      0;
 
@@ -65,18 +65,21 @@ static int			count_filter			=      5;
 static int                      print_entries;
 
 static int                      target_pid                      =     -1;
-static int                      inherit                         =      0;
+static int                      target_tid                      =     -1;
+static pid_t                    *all_tids                       =      NULL;
+static int                      thread_num                      =      0;
+static bool                     inherit                         =  false;
 static int                      profile_cpu                     =     -1;
 static int                      nr_cpus                         =      0;
-static unsigned int             realtime_prio                   =      0;
-static int                      group                           =      0;
+static int                      realtime_prio                   =      0;
+static bool                     group                           =  false;
 static unsigned int             page_size;
 static unsigned int             mmap_pages                      =     16;
 static int                      freq                            =   1000; /* 1 KHz */
 
 static int                      delay_secs                      =      2;
-static int                      zero                            =      0;
-static int                      dump_symtab                     =      0;
+static bool                     zero                            =  false;
+static bool                     dump_symtab                     =  false;
 
 static bool                     hide_kernel_symbols             =  false;
 static bool                     hide_user_symbols               =  false;
@@ -93,7 +96,7 @@ struct source_line {
         struct source_line      *next;
 };
 
-static char                     *sym_filter                     =   NULL;
+static const char               *sym_filter                     =   NULL;
 struct sym_entry                *sym_filter_entry               =   NULL;
 struct sym_entry                *sym_filter_entry_sched         =   NULL;
 static int                      sym_pcnt_filter                 =      5;
@@ -133,7 +136,7 @@ static inline struct symbol *sym_entry__symbol(struct sym_entry *self)
        return ((void *)self) + symbol_conf.priv_size;
 }
 
-static void get_term_dimensions(struct winsize *ws)
+void get_term_dimensions(struct winsize *ws)
 {
         char *s = getenv("LINES");
 
@@ -169,7 +172,7 @@ static void sig_winch_handler(int sig __used)
         update_print_entries(&winsize);
 }
 
-static void parse_source(struct sym_entry *syme)
+static int parse_source(struct sym_entry *syme)
 {
         struct symbol *sym;
         struct sym_entry_source *source;
@@ -180,12 +183,21 @@ static void parse_source(struct sym_entry *syme)
         u64 len;
 
         if (!syme)
-                return;
+                return -1;
+
+        sym = sym_entry__symbol(syme);
+        map = syme->map;
+
+        /*
+         * We can't annotate with just /proc/kallsyms
+         */
+        if (map->dso->origin == DSO__ORIG_KERNEL)
+                return -1;
 
         if (syme->src == NULL) {
                 syme->src = zalloc(sizeof(*source));
                 if (syme->src == NULL)
-                        return;
+                        return -1;
                 pthread_mutex_init(&syme->src->lock, NULL);
         }
 
@@ -195,9 +207,6 @@ static void parse_source(struct sym_entry *syme)
                 pthread_mutex_lock(&source->lock);
                 goto out_assign;
         }
-
-        sym = sym_entry__symbol(syme);
-        map = syme->map;
         path = map->dso->long_name;
 
         len = sym->end - sym->start;
@@ -209,7 +218,7 @@ static void parse_source(struct sym_entry *syme)
 
         file = popen(command, "r");
         if (!file)
-                return;
+                return -1;
 
         pthread_mutex_lock(&source->lock);
         source->lines_tail = &source->lines;
@@ -245,6 +254,7 @@ static void parse_source(struct sym_entry *syme)
 out_assign:
         sym_filter_entry = syme;
         pthread_mutex_unlock(&source->lock);
+        return 0;
 }
 
 static void __zero_source_counters(struct sym_entry *syme)
@@ -410,7 +420,9 @@ static double sym_weight(const struct sym_entry *sym)
 }
 
 static long                     samples;
-static long                     userspace_samples;
+static long                     kernel_samples, us_samples;
+static long                     exact_samples;
+static long                     guest_us_samples, guest_kernel_samples;
 static const char               CONSOLE_CLEAR[] = "";
 
 static void __list_insert_active_sym(struct sym_entry *syme)
@@ -450,7 +462,11 @@ static void print_sym_table(void)
         int printed = 0, j;
         int counter, snap = !display_weighted ? sym_counter : 0;
         float samples_per_sec = samples/delay_secs;
-        float ksamples_per_sec = (samples-userspace_samples)/delay_secs;
+        float ksamples_per_sec = kernel_samples/delay_secs;
+        float us_samples_per_sec = (us_samples)/delay_secs;
+        float guest_kernel_samples_per_sec = (guest_kernel_samples)/delay_secs;
+        float guest_us_samples_per_sec = (guest_us_samples)/delay_secs;
+        float esamples_percent = (100.0*exact_samples)/samples;
         float sum_ksamples = 0.0;
         struct sym_entry *syme, *n;
         struct rb_root tmp = RB_ROOT;
@@ -458,7 +474,8 @@ static void print_sym_table(void)
         int sym_width = 0, dso_width = 0, dso_short_width = 0;
         const int win_width = winsize.ws_col - 1;
 
-        samples = userspace_samples = 0;
+        samples = us_samples = kernel_samples = exact_samples = 0;
+        guest_kernel_samples = guest_us_samples = 0;
 
         /* Sort the active symbols */
         pthread_mutex_lock(&active_symbols_lock);
@@ -489,9 +506,30 @@ static void print_sym_table(void)
         puts(CONSOLE_CLEAR);
 
         printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
-        printf( "   PerfTop:%8.0f irqs/sec  kernel:%4.1f%% [",
-                samples_per_sec,
-                100.0 - (100.0*((samples_per_sec-ksamples_per_sec)/samples_per_sec)));
+        if (!perf_guest) {
+                printf("   PerfTop:%8.0f irqs/sec  kernel:%4.1f%%"
+                        "  exact: %4.1f%% [",
+                        samples_per_sec,
+                        100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
+                                         samples_per_sec)),
+                        esamples_percent);
+        } else {
+                printf("   PerfTop:%8.0f irqs/sec  kernel:%4.1f%% us:%4.1f%%"
+                        " guest kernel:%4.1f%% guest us:%4.1f%%"
+                        " exact: %4.1f%% [",
+                        samples_per_sec,
+                        100.0 - (100.0 * ((samples_per_sec-ksamples_per_sec) /
+                                          samples_per_sec)),
+                        100.0 - (100.0 * ((samples_per_sec-us_samples_per_sec) /
+                                          samples_per_sec)),
+                        100.0 - (100.0 * ((samples_per_sec -
+                                                guest_kernel_samples_per_sec) /
+                                          samples_per_sec)),
+                        100.0 - (100.0 * ((samples_per_sec -
+                                           guest_us_samples_per_sec) /
+                                          samples_per_sec)),
+                        esamples_percent);
+        }
 
         if (nr_counters == 1 || !display_weighted) {
                 printf("%Ld", (u64)attrs[0].sample_period);
@@ -514,13 +552,15 @@ static void print_sym_table(void)
 
         if (target_pid != -1)
                 printf(" (target_pid: %d", target_pid);
+        else if (target_tid != -1)
+                printf(" (target_tid: %d", target_tid);
         else
                 printf(" (all");
 
         if (profile_cpu != -1)
                 printf(", cpu: %d)\n", profile_cpu);
         else {
-                if (target_pid != -1)
+                if (target_tid != -1)
                         printf(")\n");
                 else
                         printf(", %d CPUs)\n", nr_cpus);
@@ -582,7 +622,6 @@ static void print_sym_table(void)
 
                 syme = rb_entry(nd, struct sym_entry, rb_node);
                 sym = sym_entry__symbol(syme);
-
                 if (++printed > print_entries || (int)syme->snap_count < count_filter)
                         continue;
 
@@ -746,7 +785,7 @@ static int key_mapped(int c)
         return 0;
 }
 
-static void handle_keypress(int c)
+static void handle_keypress(struct perf_session *session, int c)
 {
         if (!key_mapped(c)) {
                 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
@@ -815,7 +854,7 @@ static void handle_keypress(int c)
                 case 'Q':
                         printf("exiting.\n");
                         if (dump_symtab)
-                                dsos__fprintf(stderr);
+                                perf_session__fprintf_dsos(session, stderr);
                         exit(0);
                 case 's':
                         prompt_symbol(&sym_filter_entry, "Enter details symbol");
@@ -839,7 +878,7 @@ static void handle_keypress(int c)
                         display_weighted = ~display_weighted;
                         break;
                 case 'z':
-                        zero = ~zero;
+                        zero = !zero;
                         break;
                 default:
                         break;
@@ -851,6 +890,7 @@ static void *display_thread(void *arg __used)
         struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
         struct termios tc, save;
         int delay_msecs, c;
+        struct perf_session *session = (struct perf_session *) arg;
 
         tcgetattr(0, &save);
         tc = save;
@@ -871,7 +911,7 @@ repeat:
         c = getc(stdin);
         tcsetattr(0, TCSAFLUSH, &save);
 
-        handle_keypress(c);
+        handle_keypress(session, c);
         goto repeat;
 
         return NULL;
@@ -942,24 +982,48 @@ static void event__process_sample(const event_t *self,
         u64 ip = self->ip.ip;
         struct sym_entry *syme;
         struct addr_location al;
+        struct machine *machine;
         u8 origin = self->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 
         ++samples;
 
         switch (origin) {
         case PERF_RECORD_MISC_USER:
-                ++userspace_samples;
+                ++us_samples;
                 if (hide_user_symbols)
                         return;
+                machine = perf_session__find_host_machine(session);
                 break;
         case PERF_RECORD_MISC_KERNEL:
+                ++kernel_samples;
                 if (hide_kernel_symbols)
                         return;
+                machine = perf_session__find_host_machine(session);
+                break;
+        case PERF_RECORD_MISC_GUEST_KERNEL:
+                ++guest_kernel_samples;
+                machine = perf_session__find_machine(session, self->ip.pid);
                 break;
+        case PERF_RECORD_MISC_GUEST_USER:
+                ++guest_us_samples;
+                /*
+                 * TODO: we don't process guest user from host side
+                 * except simple counting.
+                 */
+                return;
         default:
                 return;
         }
 
+        if (!machine && perf_guest) {
+                pr_err("Can't find guest [%d]'s kernel information\n",
+                        self->ip.pid);
+                return;
+        }
+
+        if (self->header.misc & PERF_RECORD_MISC_EXACT_IP)
+                exact_samples++;
+
         if (event__preprocess_sample(self, session, &al, symbol_filter) < 0 ||
             al.filtered)
                 return;
@@ -976,7 +1040,7 @@ static void event__process_sample(const event_t *self,
                  * --hide-kernel-symbols, even if the user specifies an
                  * invalid --vmlinux ;-)
                  */
-                if (al.map == session->vmlinux_maps[MAP__FUNCTION] &&
+                if (al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
                     RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
                         pr_err("The %s file can't be used\n",
                                symbol_conf.vmlinux_name);
@@ -990,7 +1054,17 @@ static void event__process_sample(const event_t *self,
         if (sym_filter_entry_sched) {
                 sym_filter_entry = sym_filter_entry_sched;
                 sym_filter_entry_sched = NULL;
-                parse_source(sym_filter_entry);
+                if (parse_source(sym_filter_entry) < 0) {
+                        struct symbol *sym = sym_entry__symbol(sym_filter_entry);
+
+                        pr_err("Can't annotate %s", sym->name);
+                        if (sym_filter_entry->map->dso->origin == DSO__ORIG_KERNEL) {
+                                pr_err(": No vmlinux file was found in the path:\n");
+                                vmlinux_path__fprintf(stderr);
+                        } else
+                                pr_err(".\n");
+                        exit(1);
+                }
         }
 
         syme = symbol__priv(al.sym);
@@ -1106,16 +1180,21 @@ static void perf_session__mmap_read_counter(struct perf_session *self,
         md->prev = old;
 }
 
-static struct pollfd event_array[MAX_NR_CPUS * MAX_COUNTERS];
-static struct mmap_data mmap_array[MAX_NR_CPUS][MAX_COUNTERS];
+static struct pollfd *event_array;
+static struct mmap_data *mmap_array[MAX_NR_CPUS][MAX_COUNTERS];
 
 static void perf_session__mmap_read(struct perf_session *self)
 {
-        int i, counter;
+        int i, counter, thread_index;
 
         for (i = 0; i < nr_cpus; i++) {
                 for (counter = 0; counter < nr_counters; counter++)
-                        perf_session__mmap_read_counter(self, &mmap_array[i][counter]);
+                        for (thread_index = 0;
+                                thread_index < thread_num;
+                                thread_index++) {
+                                perf_session__mmap_read_counter(self,
+                                        &mmap_array[i][counter][thread_index]);
+                        }
         }
 }
 
@@ -1126,9 +1205,10 @@ static void start_counter(int i, int counter)
 {
         struct perf_event_attr *attr;
         int cpu;
+        int thread_index;
 
         cpu = profile_cpu;
-        if (target_pid == -1 && profile_cpu == -1)
+        if (target_tid == -1 && profile_cpu == -1)
                 cpu = cpumap[i];
 
         attr = attrs + counter;
@@ -1144,55 +1224,58 @@ static void start_counter(int i, int counter)
         attr->inherit           = (cpu < 0) && inherit;
         attr->mmap              = 1;
 
+        for (thread_index = 0; thread_index < thread_num; thread_index++) {
 try_again:
-        fd[i][counter] = sys_perf_event_open(attr, target_pid, cpu, group_fd, 0);
-
-        if (fd[i][counter] < 0) {
-                int err = errno;
+                fd[i][counter][thread_index] = sys_perf_event_open(attr,
+                                all_tids[thread_index], cpu, group_fd, 0);
+
+                if (fd[i][counter][thread_index] < 0) {
+                        int err = errno;
+
+                        if (err == EPERM || err == EACCES)
+                                die("No permission - are you root?\n");
+                        /*
+                         * If it's cycles then fall back to hrtimer
+                         * based cpu-clock-tick sw counter, which
+                         * is always available even if no PMU support:
+                         */
+                        if (attr->type == PERF_TYPE_HARDWARE
+                                        && attr->config == PERF_COUNT_HW_CPU_CYCLES) {
+
+                                if (verbose)
+                                        warning(" ... trying to fall back to cpu-clock-ticks\n");
+
+                                attr->type = PERF_TYPE_SOFTWARE;
+                                attr->config = PERF_COUNT_SW_CPU_CLOCK;
+                                goto try_again;
+                        }
+                        printf("\n");
+                        error("perfcounter syscall returned with %d (%s)\n",
+                                        fd[i][counter][thread_index], strerror(err));
+                        die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
+                        exit(-1);
+                }
+                assert(fd[i][counter][thread_index] >= 0);
+                fcntl(fd[i][counter][thread_index], F_SETFL, O_NONBLOCK);
 
-                if (err == EPERM || err == EACCES)
-                        die("No permission - are you root?\n");
                 /*
-                 * If it's cycles then fall back to hrtimer
-                 * based cpu-clock-tick sw counter, which
-                 * is always available even if no PMU support:
+                 * First counter acts as the group leader:
                  */
-                if (attr->type == PERF_TYPE_HARDWARE
-                        && attr->config == PERF_COUNT_HW_CPU_CYCLES) {
-
-                        if (verbose)
-                                warning(" ... trying to fall back to cpu-clock-ticks\n");
-
-                        attr->type = PERF_TYPE_SOFTWARE;
-                        attr->config = PERF_COUNT_SW_CPU_CLOCK;
-                        goto try_again;
-                }
-                printf("\n");
-                error("perfcounter syscall returned with %d (%s)\n",
-                        fd[i][counter], strerror(err));
-                die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
-                exit(-1);
+                if (group && group_fd == -1)
+                        group_fd = fd[i][counter][thread_index];
+
+                event_array[nr_poll].fd = fd[i][counter][thread_index];
+                event_array[nr_poll].events = POLLIN;
+                nr_poll++;
+
+                mmap_array[i][counter][thread_index].counter = counter;
+                mmap_array[i][counter][thread_index].prev = 0;
+                mmap_array[i][counter][thread_index].mask = mmap_pages*page_size - 1;
+                mmap_array[i][counter][thread_index].base = mmap(NULL, (mmap_pages+1)*page_size,
+                                PROT_READ, MAP_SHARED, fd[i][counter][thread_index], 0);
+                if (mmap_array[i][counter][thread_index].base == MAP_FAILED)
+                        die("failed to mmap with %d (%s)\n", errno, strerror(errno));
         }
-        assert(fd[i][counter] >= 0);
-        fcntl(fd[i][counter], F_SETFL, O_NONBLOCK);
-
-        /*
-         * First counter acts as the group leader:
-         */
-        if (group && group_fd == -1)
-                group_fd = fd[i][counter];
-
-        event_array[nr_poll].fd = fd[i][counter];
-        event_array[nr_poll].events = POLLIN;
-        nr_poll++;
-
-        mmap_array[i][counter].counter = counter;
-        mmap_array[i][counter].prev = 0;
-        mmap_array[i][counter].mask = mmap_pages*page_size - 1;
-        mmap_array[i][counter].base = mmap(NULL, (mmap_pages+1)*page_size,
-                        PROT_READ, MAP_SHARED, fd[i][counter], 0);
-        if (mmap_array[i][counter].base == MAP_FAILED)
-                die("failed to mmap with %d (%s)\n", errno, strerror(errno));
 }
 
 static int __cmd_top(void)
@@ -1204,12 +1287,12 @@ static int __cmd_top(void)
          * FIXME: perf_session__new should allow passing a O_MMAP, so that all this
          * mmap reading, etc is encapsulated in it. Use O_WRONLY for now.
          */
-        struct perf_session *session = perf_session__new(NULL, O_WRONLY, false);
+        struct perf_session *session = perf_session__new(NULL, O_WRONLY, false, false);
         if (session == NULL)
                 return -ENOMEM;
 
-        if (target_pid != -1)
-                event__synthesize_thread(target_pid, event__process, session);
+        if (target_tid != -1)
+                event__synthesize_thread(target_tid, event__process, session);
         else
                 event__synthesize_threads(event__process, session);
 
@@ -1220,11 +1303,11 @@ static int __cmd_top(void)
         }
 
         /* Wait for a minimal set of events before starting the snapshot */
-        poll(event_array, nr_poll, 100);
+        poll(&event_array[0], nr_poll, 100);
 
         perf_session__mmap_read(session);
 
-        if (pthread_create(&thread, NULL, display_thread, NULL)) {
+        if (pthread_create(&thread, NULL, display_thread, session)) {
                 printf("Could not create display thread.\n");
                 exit(-1);
         }
@@ -1263,7 +1346,9 @@ static const struct option options[] = {
         OPT_INTEGER('c', "count", &default_interval,
                     "event period to sample"),
         OPT_INTEGER('p', "pid", &target_pid,
-                    "profile events on existing pid"),
+                    "profile events on existing process id"),
+        OPT_INTEGER('t', "tid", &target_tid,
+                    "profile events on existing thread id"),
         OPT_BOOLEAN('a', "all-cpus", &system_wide,
                             "system-wide collection from all CPUs"),
         OPT_INTEGER('C', "CPU", &profile_cpu,
@@ -1272,8 +1357,7 @@ static const struct option options[] = {
                    "file", "vmlinux pathname"),
         OPT_BOOLEAN('K', "hide_kernel_symbols", &hide_kernel_symbols,
                     "hide kernel symbols"),
-        OPT_INTEGER('m', "mmap-pages", &mmap_pages,
-                    "number of mmap data pages"),
+        OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"),
         OPT_INTEGER('r', "realtime", &realtime_prio,
                     "collect data with this RT SCHED_FIFO priority"),
         OPT_INTEGER('d', "delay", &delay_secs,
@@ -1296,7 +1380,7 @@ static const struct option options[] = {
                     "display this many functions"),
         OPT_BOOLEAN('U', "hide_user_symbols", &hide_user_symbols,
                     "hide user symbols"),
-        OPT_BOOLEAN('v', "verbose", &verbose,
+        OPT_INCR('v', "verbose", &verbose,
                     "be more verbose (show counter open errors, etc)"),
         OPT_END()
 };
@@ -1304,6 +1388,7 @@ static const struct option options[] = {
 int cmd_top(int argc, const char **argv, const char *prefix __used)
 {
         int counter;
+        int i,j;
 
         page_size = sysconf(_SC_PAGE_SIZE);
 
@@ -1311,8 +1396,39 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
         if (argc)
                 usage_with_options(top_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(top_usage, options);
+                }
+        } else {
+                all_tids=malloc(sizeof(pid_t));
+                if (!all_tids)
+                        return -ENOMEM;
+
+                all_tids[0] = target_tid;
+                thread_num = 1;
+        }
+
+        for (i = 0; i < MAX_NR_CPUS; i++) {
+                for (j = 0; j < MAX_COUNTERS; j++) {
+                        fd[i][j] = malloc(sizeof(int)*thread_num);
+                        mmap_array[i][j] = zalloc(
+                                sizeof(struct mmap_data)*thread_num);
+                        if (!fd[i][j] || !mmap_array[i][j])
+                                return -ENOMEM;
+                }
+        }
+        event_array = malloc(
+                sizeof(struct pollfd)*MAX_NR_CPUS*MAX_COUNTERS*thread_num);
+        if (!event_array)
+                return -ENOMEM;
+
         /* CPU and PID are mutually exclusive */
-        if (target_pid != -1 && profile_cpu != -1) {
+        if (target_tid > 0 && profile_cpu != -1) {
                 printf("WARNING: PID switch overriding CPU\n");
                 sleep(1);
                 profile_cpu = -1;
@@ -1353,7 +1469,7 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
                 attrs[counter].sample_period = default_interval;
         }
 
-        if (target_pid != -1 || profile_cpu != -1)
+        if (target_tid != -1 || profile_cpu != -1)
                 nr_cpus = 1;
         else
                 nr_cpus = read_cpu_map();