hist.c

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#include <math.h>

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


/* hist period print (hpp) functions */
static int hpp__header_overhead(struct perf_hpp *hpp)
{
    return scnprintf(hpp->buf, hpp->size, "Overhead");
}

static int hpp__width_overhead(struct perf_hpp *hpp __maybe_unused)
{
    return 8;
}

static int hpp__color_overhead(struct perf_hpp *hpp, struct hist_entry *he)
{
    struct hists *hists = he->hists;
    double percent = 100.0 * he->stat.period / hists->stats.total_period;

    return percent_color_snprintf(hpp->buf, hpp->size, " %6.2f%%", percent);
}

static int hpp__entry_overhead(struct perf_hpp *hpp, struct hist_entry *he)
{
    struct hists *hists = he->hists;
    double percent = 100.0 * he->stat.period / hists->stats.total_period;
    const char *fmt = symbol_conf.field_sep ? "%.2f" : " %6.2f%%";

    return scnprintf(hpp->buf, hpp->size, fmt, percent);
}

static int hpp__header_overhead_sys(struct perf_hpp *hpp)
{
    const char *fmt = symbol_conf.field_sep ? "%s" : "%7s";

    return scnprintf(hpp->buf, hpp->size, fmt, "sys");
}

static int hpp__width_overhead_sys(struct perf_hpp *hpp __maybe_unused)
{
    return 7;
}

static int hpp__color_overhead_sys(struct perf_hpp *hpp, struct hist_entry *he)
{
    struct hists *hists = he->hists;
    double percent = 100.0 * he->stat.period_sys / hists->stats.total_period;

    return percent_color_snprintf(hpp->buf, hpp->size, "%6.2f%%", percent);
}

static int hpp__entry_overhead_sys(struct perf_hpp *hpp, struct hist_entry *he)
{
    struct hists *hists = he->hists;
    double percent = 100.0 * he->stat.period_sys / hists->stats.total_period;
    const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%";

    return scnprintf(hpp->buf, hpp->size, fmt, percent);
}

static int hpp__header_overhead_us(struct perf_hpp *hpp)
{
    const char *fmt = symbol_conf.field_sep ? "%s" : "%7s";

    return scnprintf(hpp->buf, hpp->size, fmt, "user");
}

static int hpp__width_overhead_us(struct perf_hpp *hpp __maybe_unused)
{
    return 7;
}

static int hpp__color_overhead_us(struct perf_hpp *hpp, struct hist_entry *he)
{
    struct hists *hists = he->hists;
    double percent = 100.0 * he->stat.period_us / hists->stats.total_period;

    return percent_color_snprintf(hpp->buf, hpp->size, "%6.2f%%", percent);
}

static int hpp__entry_overhead_us(struct perf_hpp *hpp, struct hist_entry *he)
{
    struct hists *hists = he->hists;
    double percent = 100.0 * he->stat.period_us / hists->stats.total_period;
    const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%";

    return scnprintf(hpp->buf, hpp->size, fmt, percent);
}

static int hpp__header_overhead_guest_sys(struct perf_hpp *hpp)
{
    return scnprintf(hpp->buf, hpp->size, "guest sys");
}

static int hpp__width_overhead_guest_sys(struct perf_hpp *hpp __maybe_unused)
{
    return 9;
}

static int hpp__color_overhead_guest_sys(struct perf_hpp *hpp,
                     struct hist_entry *he)
{
    struct hists *hists = he->hists;
    double percent = 100.0 * he->stat.period_guest_sys / hists->stats.total_period;

    return percent_color_snprintf(hpp->buf, hpp->size, " %6.2f%% ", percent);
}

static int hpp__entry_overhead_guest_sys(struct perf_hpp *hpp,
                     struct hist_entry *he)
{
    struct hists *hists = he->hists;
    double percent = 100.0 * he->stat.period_guest_sys / hists->stats.total_period;
    const char *fmt = symbol_conf.field_sep ? "%.2f" : " %6.2f%% ";

    return scnprintf(hpp->buf, hpp->size, fmt, percent);
}

static int hpp__header_overhead_guest_us(struct perf_hpp *hpp)
{
    return scnprintf(hpp->buf, hpp->size, "guest usr");
}

static int hpp__width_overhead_guest_us(struct perf_hpp *hpp __maybe_unused)
{
    return 9;
}

static int hpp__color_overhead_guest_us(struct perf_hpp *hpp,
                    struct hist_entry *he)
{
    struct hists *hists = he->hists;
    double percent = 100.0 * he->stat.period_guest_us / hists->stats.total_period;

    return percent_color_snprintf(hpp->buf, hpp->size, " %6.2f%% ", percent);
}

static int hpp__entry_overhead_guest_us(struct perf_hpp *hpp,
                    struct hist_entry *he)
{
    struct hists *hists = he->hists;
    double percent = 100.0 * he->stat.period_guest_us / hists->stats.total_period;
    const char *fmt = symbol_conf.field_sep ? "%.2f" : " %6.2f%% ";

    return scnprintf(hpp->buf, hpp->size, fmt, percent);
}

static int hpp__header_baseline(struct perf_hpp *hpp)
{
    return scnprintf(hpp->buf, hpp->size, "Baseline");
}

static int hpp__width_baseline(struct perf_hpp *hpp __maybe_unused)
{
    return 8;
}

static double baseline_percent(struct hist_entry *he)
{
    struct hist_entry *pair = he->pair;
    struct hists *pair_hists = pair ? pair->hists : NULL;
    double percent = 0.0;

    if (pair) {
        u64 total_period = pair_hists->stats.total_period;
        u64 base_period  = pair->stat.period;

        percent = 100.0 * base_period / total_period;
    }

    return percent;
}

static int hpp__color_baseline(struct perf_hpp *hpp, struct hist_entry *he)
{
    double percent = baseline_percent(he);

    return percent_color_snprintf(hpp->buf, hpp->size, " %6.2f%%", percent);
}

static int hpp__entry_baseline(struct perf_hpp *hpp, struct hist_entry *he)
{
    double percent = baseline_percent(he);
    const char *fmt = symbol_conf.field_sep ? "%.2f" : " %6.2f%%";

    return scnprintf(hpp->buf, hpp->size, fmt, percent);
}

static int hpp__header_samples(struct perf_hpp *hpp)
{
    const char *fmt = symbol_conf.field_sep ? "%s" : "%11s";

    return scnprintf(hpp->buf, hpp->size, fmt, "Samples");
}

static int hpp__width_samples(struct perf_hpp *hpp __maybe_unused)
{
    return 11;
}

static int hpp__entry_samples(struct perf_hpp *hpp, struct hist_entry *he)
{
    const char *fmt = symbol_conf.field_sep ? "%" PRIu64 : "%11" PRIu64;

    return scnprintf(hpp->buf, hpp->size, fmt, he->stat.nr_events);
}

static int hpp__header_period(struct perf_hpp *hpp)
{
    const char *fmt = symbol_conf.field_sep ? "%s" : "%12s";

    return scnprintf(hpp->buf, hpp->size, fmt, "Period");
}

static int hpp__width_period(struct perf_hpp *hpp __maybe_unused)
{
    return 12;
}

static int hpp__entry_period(struct perf_hpp *hpp, struct hist_entry *he)
{
    const char *fmt = symbol_conf.field_sep ? "%" PRIu64 : "%12" PRIu64;

    return scnprintf(hpp->buf, hpp->size, fmt, he->stat.period);
}

static int hpp__header_delta(struct perf_hpp *hpp)
{
    const char *fmt = symbol_conf.field_sep ? "%s" : "%7s";

    return scnprintf(hpp->buf, hpp->size, fmt, "Delta");
}

static int hpp__width_delta(struct perf_hpp *hpp __maybe_unused)
{
    return 7;
}

static int hpp__entry_delta(struct perf_hpp *hpp, struct hist_entry *he)
{
    struct hist_entry *pair = he->pair;
    struct hists *pair_hists = pair ? pair->hists : NULL;
    struct hists *hists = he->hists;
    u64 old_total, new_total;
    double old_percent = 0, new_percent = 0;
    double diff;
    const char *fmt = symbol_conf.field_sep ? "%s" : "%7.7s";
    char buf[32] = " ";

    old_total = pair_hists ? pair_hists->stats.total_period : 0;
    if (old_total > 0 && pair)
        old_percent = 100.0 * pair->stat.period / old_total;

    new_total = hists->stats.total_period;
    if (new_total > 0)
        new_percent = 100.0 * he->stat.period / new_total;

    diff = new_percent - old_percent;
    if (fabs(diff) >= 0.01)
        scnprintf(buf, sizeof(buf), "%+4.2F%%", diff);

    return scnprintf(hpp->buf, hpp->size, fmt, buf);
}

static int hpp__header_displ(struct perf_hpp *hpp)
{
    return scnprintf(hpp->buf, hpp->size, "Displ.");
}

static int hpp__width_displ(struct perf_hpp *hpp __maybe_unused)
{
    return 6;
}

static int hpp__entry_displ(struct perf_hpp *hpp,
                struct hist_entry *he)
{
    struct hist_entry *pair = he->pair;
    long displacement = pair ? pair->position - he->position : 0;
    const char *fmt = symbol_conf.field_sep ? "%s" : "%6.6s";
    char buf[32] = " ";

    if (displacement)
        scnprintf(buf, sizeof(buf), "%+4ld", displacement);

    return scnprintf(hpp->buf, hpp->size, fmt, buf);
}

#define HPP__COLOR_PRINT_FNS(_name)     \
    .header = hpp__header_ ## _name,        \
    .width  = hpp__width_ ## _name,     \
    .color  = hpp__color_ ## _name,     \
    .entry  = hpp__entry_ ## _name

#define HPP__PRINT_FNS(_name)           \
    .header = hpp__header_ ## _name,        \
    .width  = hpp__width_ ## _name,     \
    .entry  = hpp__entry_ ## _name

struct perf_hpp_fmt perf_hpp__format[] = {
    { .cond = false, HPP__COLOR_PRINT_FNS(baseline) },
    { .cond = true,  HPP__COLOR_PRINT_FNS(overhead) },
    { .cond = false, HPP__COLOR_PRINT_FNS(overhead_sys) },
    { .cond = false, HPP__COLOR_PRINT_FNS(overhead_us) },
    { .cond = false, HPP__COLOR_PRINT_FNS(overhead_guest_sys) },
    { .cond = false, HPP__COLOR_PRINT_FNS(overhead_guest_us) },
    { .cond = false, HPP__PRINT_FNS(samples) },
    { .cond = false, HPP__PRINT_FNS(period) },
    { .cond = false, HPP__PRINT_FNS(delta) },
    { .cond = false, HPP__PRINT_FNS(displ) }
};

#undef HPP__COLOR_PRINT_FNS
#undef HPP__PRINT_FNS

void perf_hpp__init(void)
{
    if (symbol_conf.show_cpu_utilization) {
        perf_hpp__format[PERF_HPP__OVERHEAD_SYS].cond = true;
        perf_hpp__format[PERF_HPP__OVERHEAD_US].cond = true;

        if (perf_guest) {
            perf_hpp__format[PERF_HPP__OVERHEAD_GUEST_SYS].cond = true;
            perf_hpp__format[PERF_HPP__OVERHEAD_GUEST_US].cond = true;
        }
    }

    if (symbol_conf.show_nr_samples)
        perf_hpp__format[PERF_HPP__SAMPLES].cond = true;

    if (symbol_conf.show_total_period)
        perf_hpp__format[PERF_HPP__PERIOD].cond = true;
}

void perf_hpp__column_enable(unsigned col, bool enable)
{
    BUG_ON(col >= PERF_HPP__MAX_INDEX);
    perf_hpp__format[col].cond = enable;
}

static inline void advance_hpp(struct perf_hpp *hpp, int inc)
{
    hpp->buf  += inc;
    hpp->size -= inc;
}

int hist_entry__period_snprintf(struct perf_hpp *hpp, struct hist_entry *he,
                bool color)
{
    const char *sep = symbol_conf.field_sep;
    char *start = hpp->buf;
    int i, ret;
    bool first = true;

    if (symbol_conf.exclude_other && !he->parent)
        return 0;

    for (i = 0; i < PERF_HPP__MAX_INDEX; i++) {
        if (!perf_hpp__format[i].cond)
            continue;

        if (!sep || !first) {
            ret = scnprintf(hpp->buf, hpp->size, "%s", sep ?: "  ");
            advance_hpp(hpp, ret);
            first = false;
        }

        if (color && perf_hpp__format[i].color)
            ret = perf_hpp__format[i].color(hpp, he);
        else
            ret = perf_hpp__format[i].entry(hpp, he);

        advance_hpp(hpp, ret);
    }

    return hpp->buf - start;
}

int hist_entry__sort_snprintf(struct hist_entry *he, char *s, size_t size,
                  struct hists *hists)
{
    const char *sep = symbol_conf.field_sep;
    struct sort_entry *se;
    int ret = 0;

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

        ret += scnprintf(s + ret, size - ret, "%s", sep ?: "  ");
        ret += se->se_snprintf(he, s + ret, size - ret,
                       hists__col_len(hists, se->se_width_idx));
    }

    return ret;
}

/*
 * See hists__fprintf to match the column widths
 */
unsigned int hists__sort_list_width(struct hists *hists)
{
    struct sort_entry *se;
    int i, ret = 0;

    for (i = 0; i < PERF_HPP__MAX_INDEX; i++) {
        if (!perf_hpp__format[i].cond)
            continue;
        if (i)
            ret += 2;

        ret += perf_hpp__format[i].width(NULL);
    }

    list_for_each_entry(se, &hist_entry__sort_list, list)
        if (!se->elide)
            ret += 2 + hists__col_len(hists, se->se_width_idx);

    if (verbose) /* Addr + origin */
        ret += 3 + BITS_PER_LONG / 4;

    return ret;
}