diff options
Diffstat (limited to 'runtime/stat-common.c')
| -rw-r--r-- | runtime/stat-common.c | 74 |
1 files changed, 42 insertions, 32 deletions
diff --git a/runtime/stat-common.c b/runtime/stat-common.c index 7dabe708..db85c35b 100644 --- a/runtime/stat-common.c +++ b/runtime/stat-common.c @@ -53,12 +53,15 @@ static int needed_space(int64_t v) return space; } -static void reprint (int num, char *s) +static int reprint_buf(char *buf, size_t size, int num, char *s) { + char *cur_buf = buf, *fake = buf; + char **ptr = (buf == NULL ? &fake : &cur_buf); while (num > 0) { - _stp_print(s); + *ptr += _stp_snprintf(cur_buf, buf + size - cur_buf, s); num--; } + return *ptr - buf; } /* Given a bucket number for a log histogram, return the value. */ @@ -138,12 +141,14 @@ static int _stp_val_to_bucket(int64_t val) #endif -static void _stp_stat_print_histogram (Hist st, stat *sd) +static void _stp_stat_print_histogram_buf(char *buf, size_t size, Hist st, stat *sd) { int scale, i, j, val_space, cnt_space; int low_bucket = -1, high_bucket = 0, over = 0, under = 0; int64_t val, v, max = 0; - int eliding = 0; + int eliding = 0; + char *cur_buf = buf, *fake = buf; + char **ptr = (buf == NULL ? &fake : &cur_buf); if (st->type != HIST_LOG && st->type != HIST_LINEAR) return; @@ -185,23 +190,23 @@ static void _stp_stat_print_histogram (Hist st, stat *sd) if (high_bucket == st->buckets-1) over = 1; } - + if (max <= HIST_WIDTH) scale = 1; else { int64_t tmp = max; - int rem = do_div (tmp, HIST_WIDTH); + int rem = do_div(tmp, HIST_WIDTH); scale = tmp; if (rem) scale++; } /* count space */ - cnt_space = needed_space (max); + cnt_space = needed_space(max); /* Compute value space */ if (st->type == HIST_LINEAR) { - i = needed_space (st->start) + under; - val_space = needed_space (st->start + st->interval * high_bucket) + over; + i = needed_space(st->start) + under; + val_space = needed_space(st->start + st->interval * high_bucket) + over; } else { i = needed_space(_stp_bucket_to_val(high_bucket)); val_space = needed_space(_stp_bucket_to_val(low_bucket)); @@ -217,13 +222,13 @@ static void _stp_stat_print_histogram (Hist st, stat *sd) else val_space = 5; for ( i = 0; i < j; i++) - _stp_print(" "); - _stp_print("value |"); - reprint (HIST_WIDTH, "-"); - _stp_print(" count\n"); + *ptr += _stp_snprintf(cur_buf, buf + size - cur_buf, " "); + *ptr += _stp_snprintf(cur_buf, buf + size - cur_buf, "value |"); + *ptr += reprint_buf(cur_buf, buf + size - cur_buf, HIST_WIDTH, "-"); + *ptr += _stp_snprintf(cur_buf, buf + size - cur_buf, " count\n"); - eliding=0; - for (i = low_bucket; i <= high_bucket; i++) { + eliding = 0; + for (i = low_bucket; i <= high_bucket; i++) { int over_under = 0; /* Elide consecutive zero buckets. Specifically, skip @@ -231,7 +236,7 @@ static void _stp_stat_print_histogram (Hist st, stat *sd) neighbours are also zero. Don't elide zero buckets if HIST_ELISION is negative */ if ((long)HIST_ELISION >= 0) { - int k, elide=1; + int k, elide = 1; /* Can't elide more than the total # of buckets */ int max_elide = min_t(long, HIST_ELISION, st->buckets); int min_bucket = low_bucket; @@ -254,8 +259,8 @@ static void _stp_stat_print_histogram (Hist st, stat *sd) about to print a new one. So let's print a mark on the vertical axis to represent the missing rows. */ if (eliding) { - reprint (val_space, " "); - _stp_print(" ~\n"); + *ptr += reprint_buf(cur_buf, buf + size - cur_buf, val_space, " "); + *ptr += _stp_snprintf(cur_buf, buf + size - cur_buf, " ~\n"); eliding = 0; } } @@ -269,33 +274,38 @@ static void _stp_stat_print_histogram (Hist st, stat *sd) /* overflow */ val = st->start + (i - 2) * st->interval; over_under = 1; - } else + } else val = st->start + (i - 1) * st->interval; } else val = _stp_bucket_to_val(i); - reprint (val_space - needed_space(val) - over_under, " "); + *ptr += reprint_buf(cur_buf, buf + size - cur_buf, val_space - needed_space(val) - over_under, " "); if (over_under) { if (i == 0) - _stp_printf("<%lld", val); + *ptr += _stp_snprintf(cur_buf, buf + size - cur_buf, "<%lld", val); else if (i == st->buckets-1) - _stp_printf(">%lld", val); + *ptr += _stp_snprintf(cur_buf, buf + size - cur_buf, ">%lld", val); else - _stp_printf("%lld", val); + *ptr += _stp_snprintf(cur_buf, buf + size - cur_buf, "%lld", val); } else - _stp_printf("%lld", val); - _stp_print(" |"); - + *ptr += _stp_snprintf(cur_buf, buf + size - cur_buf, "%lld", val); + *ptr += _stp_snprintf(cur_buf, buf + size - cur_buf, " |"); + /* v = s->histogram[i] / scale; */ v = sd->histogram[i]; - do_div (v, scale); - - reprint (v, "@"); - reprint (HIST_WIDTH - v + 1 + cnt_space - needed_space(sd->histogram[i]), " "); - _stp_printf ("%lld\n", sd->histogram[i]); + do_div(v, scale); + + *ptr += reprint_buf(cur_buf, buf + size - cur_buf, v, "@"); + *ptr += reprint_buf(cur_buf, buf + size - cur_buf, HIST_WIDTH - v + 1 + cnt_space - needed_space(sd->histogram[i]), " "); + *ptr += _stp_snprintf(cur_buf, buf + size - cur_buf, "%lld\n", sd->histogram[i]); } - _stp_print_char('\n'); + *ptr += _stp_snprintf(cur_buf, buf + size - cur_buf, "\n"); +} + +static void _stp_stat_print_histogram(Hist st, stat *sd) +{ + _stp_stat_print_histogram_buf(NULL, 0, st, sd); _stp_print_flush(); } |