diff options
Diffstat (limited to 'btt/q2d.c')
| -rw-r--r-- | btt/q2d.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/btt/q2d.c b/btt/q2d.c new file mode 100644 index 0000000..faeb712 --- /dev/null +++ b/btt/q2d.c @@ -0,0 +1,121 @@ +/* + * blktrace output analysis: generate a timeline & gather statistics + * + * (C) Copyright 2007 Hewlett-Packard Development Company, L.P. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "globals.h" + +#define Q2D_MAX_HISTO 9 +struct q2d_info { + unsigned long nhistos; + unsigned long histos[Q2D_MAX_HISTO + 1]; +}; + +void q2d_histo_add(void *priv, __u64 q2d_in) +{ + int index; + struct q2d_info *q2dp = priv; + double q2d = BIT_TIME(q2d_in); + long msec = (long)(q2d / 0.001); + + switch (msec) { + default: index = 9; break; + case 500 ... 999: index = 8; break; + case 250 ... 499: index = 7; break; + case 100 ... 249: index = 6; break; + case 75 ... 99: index = 5; break; + case 50 ... 74: index = 4; break; + case 25 ... 49: index = 3; break; + case 10 ... 24: index = 2; break; + case 5 ... 9: index = 1; break; + case 0 ... 4: index = 0; break; + } + + q2dp->histos[index]++; + q2dp->nhistos++; +} + +void *q2d_alloc(void) +{ + struct q2d_info *q2dp = malloc(sizeof(*q2dp)); + + return memset(q2dp, 0, sizeof(*q2dp)); +} + +void q2d_free(void *priv) +{ + free(priv); +} + +void q2d_display_header(FILE *fp) +{ + fprintf(fp, "%5s ", "<.005"); + fprintf(fp, "%5s ", "<.010"); + fprintf(fp, "%5s ", "<.025"); + fprintf(fp, "%5s ", "<.050"); + fprintf(fp, "%5s ", "<.075"); + fprintf(fp, "%5s ", "<.100"); + fprintf(fp, "%5s ", "<.250"); + fprintf(fp, "%5s ", "<.500"); + fprintf(fp, "%5s ", "< 1.0"); + fprintf(fp, "%5s ", ">=1.0\n"); +} + +void q2d_display_dashes(FILE *fp) +{ + int i; + + for (i = 0; i <= Q2D_MAX_HISTO; i++) + fprintf(fp, "===== "); + fprintf(fp, "\n"); +} + +void q2d_display(FILE *fp, void *priv) +{ + int i; + struct q2d_info *q2dp = priv; + double nh = (double)q2dp->nhistos; + + for (i = 0; i <= Q2D_MAX_HISTO; i++) { + double p = 100.0 * (double)q2dp->histos[i] / nh; + fprintf(fp, "%5.1lf ", p); + } + fprintf(fp, "\n"); +} + +int q2d_ok(void *priv) +{ + struct q2d_info *q2dp = priv; + + return q2dp && q2dp->nhistos > 0; +} + +void q2d_acc(void *a1, void *a2) +{ + int i; + struct q2d_info *ap = a1; + struct q2d_info *tp = a2; + + for (i = 0; i <= Q2D_MAX_HISTO; i++) + ap->histos[i] += tp->histos[i]; + ap->nhistos += tp->nhistos; +} |