mm-only debug patch...

[mmotm.git] / tools / perf / builtin-report.c

/*
 * builtin-report.c
 *
 * Builtin report command: Analyze the perf.data input file,
 * look up and read DSOs and symbol information and display
 * a histogram of results, along various sorting keys.
 */
#include "builtin.h"

#include "util/util.h"

#include "util/color.h"
#include <linux/list.h>
#include "util/cache.h"
#include <linux/rbtree.h>
#include "util/symbol.h"
#include "util/string.h"
#include "util/callchain.h"
#include "util/strlist.h"
#include "util/values.h"

#include "perf.h"
#include "util/debug.h"
#include "util/header.h"

#include "util/parse-options.h"
#include "util/parse-events.h"

#include "util/data_map.h"
#include "util/thread.h"
#include "util/sort.h"
#include "util/hist.h"

static char             const *input_name = "perf.data";

static char             *dso_list_str, *comm_list_str, *sym_list_str,
                        *col_width_list_str;
static struct strlist   *dso_list, *comm_list, *sym_list;

static int              force;

static int              full_paths;
static int              show_nr_samples;

static int              show_threads;
static struct perf_read_values  show_threads_values;

static char             default_pretty_printing_style[] = "normal";
static char             *pretty_printing_style = default_pretty_printing_style;

static int              exclude_other = 1;

static char             callchain_default_opt[] = "fractal,0.5";

static char             *cwd;
static int              cwdlen;

static struct rb_root   threads;
static struct thread    *last_match;

static struct perf_header *header;

static u64              sample_type;

static size_t ipchain__fprintf_graph_line(FILE *fp, int depth, int depth_mask)
{
        int i;
        size_t ret = 0;

        ret += fprintf(fp, "%s", "                ");

        for (i = 0; i < depth; i++)
                if (depth_mask & (1 << i))
                        ret += fprintf(fp, "|          ");
                else
                        ret += fprintf(fp, "           ");

        ret += fprintf(fp, "\n");

        return ret;
}
static size_t
ipchain__fprintf_graph(FILE *fp, struct callchain_list *chain, int depth,
                       int depth_mask, int count, u64 total_samples,
                       int hits)
{
        int i;
        size_t ret = 0;

        ret += fprintf(fp, "%s", "                ");
        for (i = 0; i < depth; i++) {
                if (depth_mask & (1 << i))
                        ret += fprintf(fp, "|");
                else
                        ret += fprintf(fp, " ");
                if (!count && i == depth - 1) {
                        double percent;

                        percent = hits * 100.0 / total_samples;
                        ret += percent_color_fprintf(fp, "--%2.2f%%-- ", percent);
                } else
                        ret += fprintf(fp, "%s", "          ");
        }
        if (chain->sym)
                ret += fprintf(fp, "%s\n", chain->sym->name);
        else
                ret += fprintf(fp, "%p\n", (void *)(long)chain->ip);

        return ret;
}

static struct symbol *rem_sq_bracket;
static struct callchain_list rem_hits;

static void init_rem_hits(void)
{
        rem_sq_bracket = malloc(sizeof(*rem_sq_bracket) + 6);
        if (!rem_sq_bracket) {
                fprintf(stderr, "Not enough memory to display remaining hits\n");
                return;
        }

        strcpy(rem_sq_bracket->name, "[...]");
        rem_hits.sym = rem_sq_bracket;
}

static size_t
callchain__fprintf_graph(FILE *fp, struct callchain_node *self,
                        u64 total_samples, int depth, int depth_mask)
{
        struct rb_node *node, *next;
        struct callchain_node *child;
        struct callchain_list *chain;
        int new_depth_mask = depth_mask;
        u64 new_total;
        u64 remaining;
        size_t ret = 0;
        int i;

        if (callchain_param.mode == CHAIN_GRAPH_REL)
                new_total = self->children_hit;
        else
                new_total = total_samples;

        remaining = new_total;

        node = rb_first(&self->rb_root);
        while (node) {
                u64 cumul;

                child = rb_entry(node, struct callchain_node, rb_node);
                cumul = cumul_hits(child);
                remaining -= cumul;

                /*
                 * The depth mask manages the output of pipes that show
                 * the depth. We don't want to keep the pipes of the current
                 * level for the last child of this depth.
                 * Except if we have remaining filtered hits. They will
                 * supersede the last child
                 */
                next = rb_next(node);
                if (!next && (callchain_param.mode != CHAIN_GRAPH_REL || !remaining))
                        new_depth_mask &= ~(1 << (depth - 1));

                /*
                 * But we keep the older depth mask for the line seperator
                 * to keep the level link until we reach the last child
                 */
                ret += ipchain__fprintf_graph_line(fp, depth, depth_mask);
                i = 0;
                list_for_each_entry(chain, &child->val, list) {
                        if (chain->ip >= PERF_CONTEXT_MAX)
                                continue;
                        ret += ipchain__fprintf_graph(fp, chain, depth,
                                                      new_depth_mask, i++,
                                                      new_total,
                                                      cumul);
                }
                ret += callchain__fprintf_graph(fp, child, new_total,
                                                depth + 1,
                                                new_depth_mask | (1 << depth));
                node = next;
        }

        if (callchain_param.mode == CHAIN_GRAPH_REL &&
                remaining && remaining != new_total) {

                if (!rem_sq_bracket)
                        return ret;

                new_depth_mask &= ~(1 << (depth - 1));

                ret += ipchain__fprintf_graph(fp, &rem_hits, depth,
                                              new_depth_mask, 0, new_total,
                                              remaining);
        }

        return ret;
}

static size_t
callchain__fprintf_flat(FILE *fp, struct callchain_node *self,
                        u64 total_samples)
{
        struct callchain_list *chain;
        size_t ret = 0;

        if (!self)
                return 0;

        ret += callchain__fprintf_flat(fp, self->parent, total_samples);


        list_for_each_entry(chain, &self->val, list) {
                if (chain->ip >= PERF_CONTEXT_MAX)
                        continue;
                if (chain->sym)
                        ret += fprintf(fp, "                %s\n", chain->sym->name);
                else
                        ret += fprintf(fp, "                %p\n",
                                        (void *)(long)chain->ip);
        }

        return ret;
}

static size_t
hist_entry_callchain__fprintf(FILE *fp, struct hist_entry *self,
                              u64 total_samples)
{
        struct rb_node *rb_node;
        struct callchain_node *chain;
        size_t ret = 0;

        rb_node = rb_first(&self->sorted_chain);
        while (rb_node) {
                double percent;

                chain = rb_entry(rb_node, struct callchain_node, rb_node);
                percent = chain->hit * 100.0 / total_samples;
                switch (callchain_param.mode) {
                case CHAIN_FLAT:
                        ret += percent_color_fprintf(fp, "           %6.2f%%\n",
                                                     percent);
                        ret += callchain__fprintf_flat(fp, chain, total_samples);
                        break;
                case CHAIN_GRAPH_ABS: /* Falldown */
                case CHAIN_GRAPH_REL:
                        ret += callchain__fprintf_graph(fp, chain,
                                                        total_samples, 1, 1);
                case CHAIN_NONE:
                default:
                        break;
                }
                ret += fprintf(fp, "\n");
                rb_node = rb_next(rb_node);
        }

        return ret;
}

static size_t
hist_entry__fprintf(FILE *fp, struct hist_entry *self, u64 total_samples)
{
        struct sort_entry *se;
        size_t ret;

        if (exclude_other && !self->parent)
                return 0;

        if (total_samples)
                ret = percent_color_fprintf(fp,
                                            field_sep ? "%.2f" : "   %6.2f%%",
                                        (self->count * 100.0) / total_samples);
        else
                ret = fprintf(fp, field_sep ? "%lld" : "%12lld ", self->count);

        if (show_nr_samples) {
                if (field_sep)
                        fprintf(fp, "%c%lld", *field_sep, self->count);
                else
                        fprintf(fp, "%11lld", self->count);
        }

        list_for_each_entry(se, &hist_entry__sort_list, list) {
                if (se->elide)
                        continue;

                fprintf(fp, "%s", field_sep ?: "  ");
                ret += se->print(fp, self, se->width ? *se->width : 0);
        }

        ret += fprintf(fp, "\n");

        if (callchain)
                hist_entry_callchain__fprintf(fp, self, total_samples);

        return ret;
}

/*
 *
 */

static void dso__calc_col_width(struct dso *self)
{
        if (!col_width_list_str && !field_sep &&
            (!dso_list || strlist__has_entry(dso_list, self->name))) {
                unsigned int slen = strlen(self->name);
                if (slen > dsos__col_width)
                        dsos__col_width = slen;
        }

        self->slen_calculated = 1;
}

static void thread__comm_adjust(struct thread *self)
{
        char *comm = self->comm;

        if (!col_width_list_str && !field_sep &&
            (!comm_list || strlist__has_entry(comm_list, comm))) {
                unsigned int slen = strlen(comm);

                if (slen > comms__col_width) {
                        comms__col_width = slen;
                        threads__col_width = slen + 6;
                }
        }
}

static int thread__set_comm_adjust(struct thread *self, const char *comm)
{
        int ret = thread__set_comm(self, comm);

        if (ret)
                return ret;

        thread__comm_adjust(self);

        return 0;
}


static struct symbol *
resolve_symbol(struct thread *thread, struct map **mapp, u64 *ipp)
{
        struct map *map = mapp ? *mapp : NULL;
        u64 ip = *ipp;

        if (map)
                goto got_map;

        if (!thread)
                return NULL;

        map = thread__find_map(thread, ip);
        if (map != NULL) {
                /*
                 * We have to do this here as we may have a dso
                 * with no symbol hit that has a name longer than
                 * the ones with symbols sampled.
                 */
                if (!sort_dso.elide && !map->dso->slen_calculated)
                        dso__calc_col_width(map->dso);

                if (mapp)
                        *mapp = map;
got_map:
                ip = map->map_ip(map, ip);
        } else {
                /*
                 * If this is outside of all known maps,
                 * and is a negative address, try to look it
                 * up in the kernel dso, as it might be a
                 * vsyscall or vdso (which executes in user-mode).
                 *
                 * XXX This is nasty, we should have a symbol list in
                 * the "[vdso]" dso, but for now lets use the old
                 * trick of looking in the whole kernel symbol list.
                 */
                if ((long long)ip < 0)
                        return kernel_maps__find_symbol(ip, mapp);
        }
        dump_printf(" ...... dso: %s\n",
                    map ? map->dso->long_name : "<not found>");
        dump_printf(" ...... map: %Lx -> %Lx\n", *ipp, ip);
        *ipp  = ip;

        return map ? map->dso->find_symbol(map->dso, ip) : NULL;
}

static int call__match(struct symbol *sym)
{
        if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0))
                return 1;

        return 0;
}

static struct symbol **resolve_callchain(struct thread *thread, struct map *map,
                                         struct ip_callchain *chain,
                                         struct symbol **parent)
{
        u64 context = PERF_CONTEXT_MAX;
        struct symbol **syms = NULL;
        unsigned int i;

        if (callchain) {
                syms = calloc(chain->nr, sizeof(*syms));
                if (!syms) {
                        fprintf(stderr, "Can't allocate memory for symbols\n");
                        exit(-1);
                }
        }

        for (i = 0; i < chain->nr; i++) {
                u64 ip = chain->ips[i];
                struct symbol *sym = NULL;

                if (ip >= PERF_CONTEXT_MAX) {
                        context = ip;
                        continue;
                }

                switch (context) {
                case PERF_CONTEXT_HV:
                        break;
                case PERF_CONTEXT_KERNEL:
                        sym = kernel_maps__find_symbol(ip, &map);
                        break;
                default:
                        sym = resolve_symbol(thread, &map, &ip);
                        break;
                }

                if (sym) {
                        if (sort__has_parent && !*parent && call__match(sym))
                                *parent = sym;
                        if (!callchain)
                                break;
                        syms[i] = sym;
                }
        }

        return syms;
}

/*
 * collect histogram counts
 */

static int
hist_entry__add(struct thread *thread, struct map *map,
                struct symbol *sym, u64 ip, struct ip_callchain *chain,
                char level, u64 count)
{
        struct symbol **syms = NULL, *parent = NULL;
        bool hit;
        struct hist_entry *he;

        if ((sort__has_parent || callchain) && chain)
                syms = resolve_callchain(thread, map, chain, &parent);

        he = __hist_entry__add(thread, map, sym, parent,
                               ip, count, level, &hit);
        if (he == NULL)
                return -ENOMEM;

        if (hit)
                he->count += count;

        if (callchain) {
                if (!hit)
                        callchain_init(&he->callchain);
                append_chain(&he->callchain, chain, syms);
                free(syms);
        }

        return 0;
}

static size_t output__fprintf(FILE *fp, u64 total_samples)
{
        struct hist_entry *pos;
        struct sort_entry *se;
        struct rb_node *nd;
        size_t ret = 0;
        unsigned int width;
        char *col_width = col_width_list_str;
        int raw_printing_style;

        raw_printing_style = !strcmp(pretty_printing_style, "raw");

        init_rem_hits();

        fprintf(fp, "# Samples: %Ld\n", (u64)total_samples);
        fprintf(fp, "#\n");

        fprintf(fp, "# Overhead");
        if (show_nr_samples) {
                if (field_sep)
                        fprintf(fp, "%cSamples", *field_sep);
                else
                        fputs("  Samples  ", fp);
        }
        list_for_each_entry(se, &hist_entry__sort_list, list) {
                if (se->elide)
                        continue;
                if (field_sep) {
                        fprintf(fp, "%c%s", *field_sep, se->header);
                        continue;
                }
                width = strlen(se->header);
                if (se->width) {
                        if (col_width_list_str) {
                                if (col_width) {
                                        *se->width = atoi(col_width);
                                        col_width = strchr(col_width, ',');
                                        if (col_width)
                                                ++col_width;
                                }
                        }
                        width = *se->width = max(*se->width, width);
                }
                fprintf(fp, "  %*s", width, se->header);
        }
        fprintf(fp, "\n");

        if (field_sep)
                goto print_entries;

        fprintf(fp, "# ........");
        if (show_nr_samples)
                fprintf(fp, " ..........");
        list_for_each_entry(se, &hist_entry__sort_list, list) {
                unsigned int i;

                if (se->elide)
                        continue;

                fprintf(fp, "  ");
                if (se->width)
                        width = *se->width;
                else
                        width = strlen(se->header);
                for (i = 0; i < width; i++)
                        fprintf(fp, ".");
        }
        fprintf(fp, "\n");

        fprintf(fp, "#\n");

print_entries:
        for (nd = rb_first(&output_hists); nd; nd = rb_next(nd)) {
                pos = rb_entry(nd, struct hist_entry, rb_node);
                ret += hist_entry__fprintf(fp, pos, total_samples);
        }

        if (sort_order == default_sort_order &&
                        parent_pattern == default_parent_pattern) {
                fprintf(fp, "#\n");
                fprintf(fp, "# (For a higher level overview, try: perf report --sort comm,dso)\n");
                fprintf(fp, "#\n");
        }
        fprintf(fp, "\n");

        free(rem_sq_bracket);

        if (show_threads)
                perf_read_values_display(fp, &show_threads_values,
                                         raw_printing_style);

        return ret;
}

static int validate_chain(struct ip_callchain *chain, event_t *event)
{
        unsigned int chain_size;

        chain_size = event->header.size;
        chain_size -= (unsigned long)&event->ip.__more_data - (unsigned long)event;

        if (chain->nr*sizeof(u64) > chain_size)
                return -1;

        return 0;
}

static int
process_sample_event(event_t *event, unsigned long offset, unsigned long head)
{
        char level;
        struct symbol *sym = NULL;
        struct thread *thread;
        u64 ip = event->ip.ip;
        u64 period = 1;
        struct map *map = NULL;
        void *more_data = event->ip.__more_data;
        struct ip_callchain *chain = NULL;
        int cpumode;

        thread = threads__findnew(event->ip.pid, &threads, &last_match);

        if (sample_type & PERF_SAMPLE_PERIOD) {
                period = *(u64 *)more_data;
                more_data += sizeof(u64);
        }

        dump_printf("%p [%p]: PERF_RECORD_SAMPLE (IP, %d): %d/%d: %p period: %Ld\n",
                (void *)(offset + head),
                (void *)(long)(event->header.size),
                event->header.misc,
                event->ip.pid, event->ip.tid,
                (void *)(long)ip,
                (long long)period);

        if (sample_type & PERF_SAMPLE_CALLCHAIN) {
                unsigned int i;

                chain = (void *)more_data;

                dump_printf("... chain: nr:%Lu\n", chain->nr);

                if (validate_chain(chain, event) < 0) {
                        eprintf("call-chain problem with event, skipping it.\n");
                        return 0;
                }

                if (dump_trace) {
                        for (i = 0; i < chain->nr; i++)
                                dump_printf("..... %2d: %016Lx\n", i, chain->ips[i]);
                }
        }

        dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);

        if (thread == NULL) {
                eprintf("problem processing %d event, skipping it.\n",
                        event->header.type);
                return -1;
        }

        if (comm_list && !strlist__has_entry(comm_list, thread->comm))
                return 0;

        cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;

        if (cpumode == PERF_RECORD_MISC_KERNEL) {
                level = 'k';
                sym = kernel_maps__find_symbol(ip, &map);
                dump_printf(" ...... dso: %s\n",
                            map ? map->dso->long_name : "<not found>");
        } else if (cpumode == PERF_RECORD_MISC_USER) {
                level = '.';
                sym = resolve_symbol(thread, &map, &ip);

        } else {
                level = 'H';
                dump_printf(" ...... dso: [hypervisor]\n");
        }

        if (dso_list &&
            (!map || !map->dso ||
             !(strlist__has_entry(dso_list, map->dso->short_name) ||
               (map->dso->short_name != map->dso->long_name &&
                strlist__has_entry(dso_list, map->dso->long_name)))))
                return 0;

        if (sym_list && sym && !strlist__has_entry(sym_list, sym->name))
                return 0;

        if (hist_entry__add(thread, map, sym, ip,
                            chain, level, period)) {
                eprintf("problem incrementing symbol count, skipping event\n");
                return -1;
        }

        total += period;

        return 0;
}

static int
process_mmap_event(event_t *event, unsigned long offset, unsigned long head)
{
        struct thread *thread;
        struct map *map = map__new(&event->mmap, cwd, cwdlen);

        thread = threads__findnew(event->mmap.pid, &threads, &last_match);

        dump_printf("%p [%p]: PERF_RECORD_MMAP %d/%d: [%p(%p) @ %p]: %s\n",
                (void *)(offset + head),
                (void *)(long)(event->header.size),
                event->mmap.pid,
                event->mmap.tid,
                (void *)(long)event->mmap.start,
                (void *)(long)event->mmap.len,
                (void *)(long)event->mmap.pgoff,
                event->mmap.filename);

        if (thread == NULL || map == NULL) {
                dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
                return 0;
        }

        thread__insert_map(thread, map);
        total_mmap++;

        return 0;
}

static int
process_comm_event(event_t *event, unsigned long offset, unsigned long head)
{
        struct thread *thread;

        thread = threads__findnew(event->comm.pid, &threads, &last_match);

        dump_printf("%p [%p]: PERF_RECORD_COMM: %s:%d\n",
                (void *)(offset + head),
                (void *)(long)(event->header.size),
                event->comm.comm, event->comm.pid);

        if (thread == NULL ||
            thread__set_comm_adjust(thread, event->comm.comm)) {
                dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
                return -1;
        }
        total_comm++;

        return 0;
}

static int
process_task_event(event_t *event, unsigned long offset, unsigned long head)
{
        struct thread *thread;
        struct thread *parent;

        thread = threads__findnew(event->fork.pid, &threads, &last_match);
        parent = threads__findnew(event->fork.ppid, &threads, &last_match);

        dump_printf("%p [%p]: PERF_RECORD_%s: (%d:%d):(%d:%d)\n",
                (void *)(offset + head),
                (void *)(long)(event->header.size),
                event->header.type == PERF_RECORD_FORK ? "FORK" : "EXIT",
                event->fork.pid, event->fork.tid,
                event->fork.ppid, event->fork.ptid);

        /*
         * A thread clone will have the same PID for both
         * parent and child.
         */
        if (thread == parent)
                return 0;

        if (event->header.type == PERF_RECORD_EXIT)
                return 0;

        if (!thread || !parent || thread__fork(thread, parent)) {
                dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
                return -1;
        }
        total_fork++;

        return 0;
}

static int
process_lost_event(event_t *event, unsigned long offset, unsigned long head)
{
        dump_printf("%p [%p]: PERF_RECORD_LOST: id:%Ld: lost:%Ld\n",
                (void *)(offset + head),
                (void *)(long)(event->header.size),
                event->lost.id,
                event->lost.lost);

        total_lost += event->lost.lost;

        return 0;
}

static int
process_read_event(event_t *event, unsigned long offset, unsigned long head)
{
        struct perf_event_attr *attr;

        attr = perf_header__find_attr(event->read.id, header);

        if (show_threads) {
                const char *name = attr ? __event_name(attr->type, attr->config)
                                   : "unknown";
                perf_read_values_add_value(&show_threads_values,
                                           event->read.pid, event->read.tid,
                                           event->read.id,
                                           name,
                                           event->read.value);
        }

        dump_printf("%p [%p]: PERF_RECORD_READ: %d %d %s %Lu\n",
                        (void *)(offset + head),
                        (void *)(long)(event->header.size),
                        event->read.pid,
                        event->read.tid,
                        attr ? __event_name(attr->type, attr->config)
                             : "FAIL",
                        event->read.value);

        return 0;
}

static int sample_type_check(u64 type)
{
        sample_type = type;

        if (!(sample_type & PERF_SAMPLE_CALLCHAIN)) {
                if (sort__has_parent) {
                        fprintf(stderr, "selected --sort parent, but no"
                                        " callchain data. Did you call"
                                        " perf record without -g?\n");
                        return -1;
                }
                if (callchain) {
                        fprintf(stderr, "selected -g but no callchain data."
                                        " Did you call perf record without"
                                        " -g?\n");
                        return -1;
                }
        } else if (callchain_param.mode != CHAIN_NONE && !callchain) {
                        callchain = 1;
                        if (register_callchain_param(&callchain_param) < 0) {
                                fprintf(stderr, "Can't register callchain"
                                                " params\n");
                                return -1;
                        }
        }

        return 0;
}

static struct perf_file_handler file_handler = {
        .process_sample_event   = process_sample_event,
        .process_mmap_event     = process_mmap_event,
        .process_comm_event     = process_comm_event,
        .process_exit_event     = process_task_event,
        .process_fork_event     = process_task_event,
        .process_lost_event     = process_lost_event,
        .process_read_event     = process_read_event,
        .sample_type_check      = sample_type_check,
};


static int __cmd_report(void)
{
        struct thread *idle;
        int ret;

        idle = register_idle_thread(&threads, &last_match);
        thread__comm_adjust(idle);

        if (show_threads)
                perf_read_values_init(&show_threads_values);

        register_perf_file_handler(&file_handler);

        ret = mmap_dispatch_perf_file(&header, input_name, force, full_paths,
                                      &cwdlen, &cwd);
        if (ret)
                return ret;

        dump_printf("      IP events: %10ld\n", total);
        dump_printf("    mmap events: %10ld\n", total_mmap);
        dump_printf("    comm events: %10ld\n", total_comm);
        dump_printf("    fork events: %10ld\n", total_fork);
        dump_printf("    lost events: %10ld\n", total_lost);
        dump_printf(" unknown events: %10ld\n", file_handler.total_unknown);

        if (dump_trace)
                return 0;

        if (verbose > 3)
                threads__fprintf(stdout, &threads);

        if (verbose > 2)
                dsos__fprintf(stdout);

        collapse__resort();
        output__resort(total);
        output__fprintf(stdout, total);

        if (show_threads)
                perf_read_values_destroy(&show_threads_values);

        return ret;
}

static int
parse_callchain_opt(const struct option *opt __used, const char *arg,
                    int unset __used)
{
        char *tok;
        char *endptr;

        callchain = 1;

        if (!arg)
                return 0;

        tok = strtok((char *)arg, ",");
        if (!tok)
                return -1;

        /* get the output mode */
        if (!strncmp(tok, "graph", strlen(arg)))
                callchain_param.mode = CHAIN_GRAPH_ABS;

        else if (!strncmp(tok, "flat", strlen(arg)))
                callchain_param.mode = CHAIN_FLAT;

        else if (!strncmp(tok, "fractal", strlen(arg)))
                callchain_param.mode = CHAIN_GRAPH_REL;

        else if (!strncmp(tok, "none", strlen(arg))) {
                callchain_param.mode = CHAIN_NONE;
                callchain = 0;

                return 0;
        }

        else
                return -1;

        /* get the min percentage */
        tok = strtok(NULL, ",");
        if (!tok)
                goto setup;

        callchain_param.min_percent = strtod(tok, &endptr);
        if (tok == endptr)
                return -1;

setup:
        if (register_callchain_param(&callchain_param) < 0) {
                fprintf(stderr, "Can't register callchain params\n");
                return -1;
        }
        return 0;
}

//static const char * const report_usage[] = {
const char * const report_usage[] = {
        "perf report [<options>] <command>",
        NULL
};

static const struct option options[] = {
        OPT_STRING('i', "input", &input_name, "file",
                    "input file name"),
        OPT_BOOLEAN('v', "verbose", &verbose,
                    "be more verbose (show symbol address, etc)"),
        OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
                    "dump raw trace in ASCII"),
        OPT_STRING('k', "vmlinux", &vmlinux_name, "file", "vmlinux pathname"),
        OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
        OPT_BOOLEAN('m', "modules", &modules,
                    "load module symbols - WARNING: use only with -k and LIVE kernel"),
        OPT_BOOLEAN('n', "show-nr-samples", &show_nr_samples,
                    "Show a column with the number of samples"),
        OPT_BOOLEAN('T', "threads", &show_threads,
                    "Show per-thread event counters"),
        OPT_STRING(0, "pretty", &pretty_printing_style, "key",
                   "pretty printing style key: normal raw"),
        OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
                   "sort by key(s): pid, comm, dso, symbol, parent"),
        OPT_BOOLEAN('P', "full-paths", &full_paths,
                    "Don't shorten the pathnames taking into account the cwd"),
        OPT_STRING('p', "parent", &parent_pattern, "regex",
                   "regex filter to identify parent, see: '--sort parent'"),
        OPT_BOOLEAN('x', "exclude-other", &exclude_other,
                    "Only display entries with parent-match"),
        OPT_CALLBACK_DEFAULT('g', "call-graph", NULL, "output_type,min_percent",
                     "Display callchains using output_type and min percent threshold. "
                     "Default: fractal,0.5", &parse_callchain_opt, callchain_default_opt),
        OPT_STRING('d', "dsos", &dso_list_str, "dso[,dso...]",
                   "only consider symbols in these dsos"),
        OPT_STRING('C', "comms", &comm_list_str, "comm[,comm...]",
                   "only consider symbols in these comms"),
        OPT_STRING('S', "symbols", &sym_list_str, "symbol[,symbol...]",
                   "only consider these symbols"),
        OPT_STRING('w', "column-widths", &col_width_list_str,
                   "width[,width...]",
                   "don't try to adjust column width, use these fixed values"),
        OPT_STRING('t', "field-separator", &field_sep, "separator",
                   "separator for columns, no spaces will be added between "
                   "columns '.' is reserved."),
        OPT_END()
};

static void setup_sorting(void)
{
        char *tmp, *tok, *str = strdup(sort_order);

        for (tok = strtok_r(str, ", ", &tmp);
                        tok; tok = strtok_r(NULL, ", ", &tmp)) {
                if (sort_dimension__add(tok) < 0) {
                        error("Unknown --sort key: `%s'", tok);
                        usage_with_options(report_usage, options);
                }
        }

        free(str);
}

static void setup_list(struct strlist **list, const char *list_str,
                       struct sort_entry *se, const char *list_name,
                       FILE *fp)
{
        if (list_str) {
                *list = strlist__new(true, list_str);
                if (!*list) {
                        fprintf(stderr, "problems parsing %s list\n",
                                list_name);
                        exit(129);
                }
                if (strlist__nr_entries(*list) == 1) {
                        fprintf(fp, "# %s: %s\n", list_name,
                                strlist__entry(*list, 0)->s);
                        se->elide = true;
                }
        }
}

int cmd_report(int argc, const char **argv, const char *prefix __used)
{
        symbol__init();

        argc = parse_options(argc, argv, options, report_usage, 0);

        setup_sorting();

        if (parent_pattern != default_parent_pattern) {
                sort_dimension__add("parent");
                sort_parent.elide = 1;
        } else
                exclude_other = 0;

        /*
         * Any (unrecognized) arguments left?
         */
        if (argc)
                usage_with_options(report_usage, options);

        setup_pager();

        setup_list(&dso_list, dso_list_str, &sort_dso, "dso", stdout);
        setup_list(&comm_list, comm_list_str, &sort_comm, "comm", stdout);
        setup_list(&sym_list, sym_list_str, &sort_sym, "symbol", stdout);

        if (field_sep && *field_sep == '.') {
                fputs("'.' is the only non valid --field-separator argument\n",
                      stderr);
                exit(129);
        }

        return __cmd_report();
}