/* * 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 * Copyright (c) 2006-2018 The strace developers. * 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 { /* time may be total latency or system time */ struct timespec time; unsigned int calls, errors; }; static struct call_counts *countv[SUPPORTED_PERSONALITIES]; #define counts (countv[current_personality]) static struct timespec overhead; void count_syscall(struct tcb *tcp, const struct timespec *syscall_exiting_ts) { if (!scno_in_range(tcp->scno)) return; if (!counts) counts = xcalloc(nsyscalls, sizeof(*counts)); struct call_counts *cc = &counts[tcp->scno]; cc->calls++; if (syserror(tcp)) cc->errors++; if (count_wallclock) { /* wall clock time spent while in syscall */ struct timespec wts; ts_sub(&wts, syscall_exiting_ts, &tcp->etime); ts_add(&cc->time, &cc->time, &wts); } else { /* system CPU time spent while in syscall */ ts_add(&cc->time, &cc->time, &tcp->dtime); } } static int time_cmp(void *a, void *b) { return -ts_cmp(&counts[*((int *) a)].time, &counts[*((int *) b)].time); } static int syscall_cmp(void *a, void *b) { const char *a_name = sysent[*((int *) a)].sys_name; const char *b_name = sysent[*((int *) b)].sys_name; return strcmp(a_name ? a_name : "", b_name ? b_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)(); 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_help("invalid sortby: '%s'", sortby); } } void set_overhead(int n) { overhead.tv_sec = n / 1000000; overhead.tv_nsec = n % 1000000 * 1000; } static void call_summary_pers(FILE *outf) { static const char dashes[] = "----------------"; static const char header[] = "%6.6s %11.11s %11.11s %9.9s %9.9s %s\n"; static const char data[] = "%6.2f %11.6f %11lu %9u %9.u %s\n"; static const char summary[] = "%6.6s %11.6f %11.11s %9u %9.u %s\n"; unsigned int i; unsigned int call_cum, error_cum; struct timespec tv_cum, dtv; double float_tv_cum; double percent; unsigned int *sorted_count; fprintf(outf, header, "% time", "seconds", "usecs/call", "calls", "errors", "syscall"); fprintf(outf, header, dashes, dashes, dashes, dashes, dashes, dashes); sorted_count = xcalloc(sizeof(sorted_count[0]), nsyscalls); call_cum = error_cum = tv_cum.tv_sec = tv_cum.tv_nsec = 0; for (i = 0; i < nsyscalls; i++) { sorted_count[i] = i; if (counts == NULL || counts[i].calls == 0) continue; ts_mul(&dtv, &overhead, counts[i].calls); ts_sub(&counts[i].time, &counts[i].time, &dtv); if (counts[i].time.tv_sec < 0 || counts[i].time.tv_nsec < 0) counts[i].time.tv_sec = counts[i].time.tv_nsec = 0; call_cum += counts[i].calls; error_cum += counts[i].errors; ts_add(&tv_cum, &tv_cum, &counts[i].time); } float_tv_cum = ts_float(&tv_cum); if (counts) { if (sortfun) qsort((void *) sorted_count, nsyscalls, sizeof(sorted_count[0]), sortfun); for (i = 0; i < nsyscalls; i++) { double float_syscall_time; unsigned int idx = sorted_count[i]; struct call_counts *cc = &counts[idx]; if (cc->calls == 0) continue; ts_div(&dtv, &cc->time, cc->calls); float_syscall_time = ts_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, data, percent, float_syscall_time, (long) (1000000 * dtv.tv_sec + dtv.tv_nsec / 1000), cc->calls, cc->errors, sysent[idx].sys_name); } } free(sorted_count); fprintf(outf, header, dashes, dashes, dashes, dashes, dashes, dashes); fprintf(outf, summary, "100.00", float_tv_cum, "", call_cum, error_cum, "total"); } void call_summary(FILE *outf) { unsigned 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 %s mode:\n", personality_names[i]); call_summary_pers(outf); } if (old_pers != current_personality) set_personality(old_pers); }