/* * Copyright (c) 1991, 1992 Paul Kranenburg * Copyright (c) 1993 Branko Lankester * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey * Copyright (c) 1996-1999 Wichert Akkerman * Copyright (c) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation * Linux for s390 port by D.J. Barrow * * Copyright (c) 2004 Roland McGrath * Copyright (c) 2006 Dmitry V. Levin * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "defs.h" /* Per-syscall stats structure */ struct call_counts { /* system time spent in syscall (not wall clock time) */ struct timeval time; int calls, errors; }; static struct call_counts *countv[SUPPORTED_PERSONALITIES]; #define counts (countv[current_personality]) static struct timeval shortest = { 1000000, 0 }; /* On entry, tv is syscall exit timestamp */ void count_syscall(struct tcb *tcp, struct timeval *tv) { struct call_counts *cc; unsigned long scno = tcp->scno; if (!SCNO_IN_RANGE(scno)) return; if (!counts) { counts = calloc(nsyscalls, sizeof(*counts)); if (!counts) die_out_of_memory(); } cc = &counts[scno]; cc->calls++; if (tcp->u_error) cc->errors++; /* tv = wall clock time spent while in syscall */ tv_sub(tv, tv, &tcp->etime); /* Spent more wall clock time than spent system time? (usually yes) */ if (tv_cmp(tv, &tcp->dtime) > 0) { static struct timeval one_tick = { -1, 0 }; if (one_tick.tv_sec == -1) { /* Initialize it. */ struct itimerval it; memset(&it, 0, sizeof it); it.it_interval.tv_usec = 1; setitimer(ITIMER_REAL, &it, NULL); getitimer(ITIMER_REAL, &it); one_tick = it.it_interval; //FIXME: this hack doesn't work (tested on linux-3.6.11): one_tick = 0.000000 //tprintf(" one_tick.tv_usec:%u\n", (unsigned)one_tick.tv_usec); } if (tv_nz(&tcp->dtime)) /* tv = system time spent, if it isn't 0 */ *tv = tcp->dtime; else if (tv_cmp(tv, &one_tick) > 0) { /* tv = smallest "sane" time interval */ if (tv_cmp(&shortest, &one_tick) < 0) *tv = shortest; else *tv = one_tick; } } if (tv_cmp(tv, &shortest) < 0) shortest = *tv; tv_add(&cc->time, &cc->time, tv); } static int time_cmp(void *a, void *b) { return -tv_cmp(&counts[*((int *) a)].time, &counts[*((int *) b)].time); } static int syscall_cmp(void *a, void *b) { return strcmp(sysent[*((int *) a)].sys_name, sysent[*((int *) b)].sys_name); } static int count_cmp(void *a, void *b) { int m = counts[*((int *) a)].calls; int n = counts[*((int *) b)].calls; return (m < n) ? 1 : (m > n) ? -1 : 0; } static int (*sortfun)(); static struct timeval overhead = { -1, -1 }; void set_sortby(const char *sortby) { if (strcmp(sortby, "time") == 0) sortfun = time_cmp; else if (strcmp(sortby, "calls") == 0) sortfun = count_cmp; else if (strcmp(sortby, "name") == 0) sortfun = syscall_cmp; else if (strcmp(sortby, "nothing") == 0) sortfun = NULL; else { error_msg_and_die("invalid sortby: '%s'", sortby); } } void set_overhead(int n) { overhead.tv_sec = n / 1000000; overhead.tv_usec = n % 1000000; } static void call_summary_pers(FILE *outf) { int i; int call_cum, error_cum; struct timeval tv_cum, dtv; double float_tv_cum; double percent; const char *dashes = "----------------"; char error_str[sizeof(int)*3]; int *sorted_count; fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %s\n", "% time", "seconds", "usecs/call", "calls", "errors", "syscall"); fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %s\n", dashes, dashes, dashes, dashes, dashes, dashes); sorted_count = calloc(sizeof(int), nsyscalls); if (!sorted_count) die_out_of_memory(); call_cum = error_cum = tv_cum.tv_sec = tv_cum.tv_usec = 0; if (overhead.tv_sec == -1) { tv_mul(&overhead, &shortest, 8); tv_div(&overhead, &overhead, 10); } for (i = 0; i < nsyscalls; i++) { sorted_count[i] = i; if (counts == NULL || counts[i].calls == 0) continue; tv_mul(&dtv, &overhead, counts[i].calls); tv_sub(&counts[i].time, &counts[i].time, &dtv); call_cum += counts[i].calls; error_cum += counts[i].errors; tv_add(&tv_cum, &tv_cum, &counts[i].time); } float_tv_cum = tv_float(&tv_cum); if (counts) { if (sortfun) qsort((void *) sorted_count, nsyscalls, sizeof(int), sortfun); for (i = 0; i < nsyscalls; i++) { double float_syscall_time; int idx = sorted_count[i]; struct call_counts *cc = &counts[idx]; if (cc->calls == 0) continue; tv_div(&dtv, &cc->time, cc->calls); error_str[0] = '\0'; if (cc->errors) sprintf(error_str, "%u", cc->errors); float_syscall_time = tv_float(&cc->time); percent = (100.0 * float_syscall_time); if (percent != 0.0) percent /= float_tv_cum; /* else: float_tv_cum can be 0.0 too and we get 0/0 = NAN */ fprintf(outf, "%6.2f %11.6f %11lu %9u %9.9s %s\n", percent, float_syscall_time, (long) (1000000 * dtv.tv_sec + dtv.tv_usec), cc->calls, error_str, sysent[idx].sys_name); } } free(sorted_count); fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %s\n", dashes, dashes, dashes, dashes, dashes, dashes); error_str[0] = '\0'; if (error_cum) sprintf(error_str, "%u", error_cum); fprintf(outf, "%6.6s %11.6f %11.11s %9u %9.9s %s\n", "100.00", float_tv_cum, "", call_cum, error_str, "total"); } void call_summary(FILE *outf) { int i, old_pers = current_personality; for (i = 0; i < SUPPORTED_PERSONALITIES; ++i) { if (!countv[i]) continue; if (current_personality != i) set_personality(i); if (i) fprintf(outf, "System call usage summary for %d bit mode:\n", current_wordsize * 8); call_summary_pers(outf); } if (old_pers != current_personality) set_personality(old_pers); }