211 lines
6.3 KiB
C
211 lines
6.3 KiB
C
/*
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* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
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* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
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* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
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* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
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* Copyright (c) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
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* Linux for s390 port by D.J. Barrow
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* <barrow_dj@mail.yahoo.com,djbarrow@de.ibm.com>
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* Copyright (c) 2004 Roland McGrath <roland@redhat.com>
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* Copyright (c) 2006 Dmitry V. Levin <ldv@altlinux.org>
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* Copyright (c) 2006-2018 The strace developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "defs.h"
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/* Per-syscall stats structure */
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struct call_counts {
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/* time may be total latency or system time */
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struct timespec time;
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unsigned int calls, errors;
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};
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static struct call_counts *countv[SUPPORTED_PERSONALITIES];
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#define counts (countv[current_personality])
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static struct timespec overhead;
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void
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count_syscall(struct tcb *tcp, const struct timespec *syscall_exiting_ts)
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{
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if (!scno_in_range(tcp->scno))
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return;
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if (!counts)
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counts = xcalloc(nsyscalls, sizeof(*counts));
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struct call_counts *cc = &counts[tcp->scno];
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cc->calls++;
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if (syserror(tcp))
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cc->errors++;
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if (count_wallclock) {
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/* wall clock time spent while in syscall */
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struct timespec wts;
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ts_sub(&wts, syscall_exiting_ts, &tcp->etime);
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ts_add(&cc->time, &cc->time, &wts);
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} else {
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/* system CPU time spent while in syscall */
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ts_add(&cc->time, &cc->time, &tcp->dtime);
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}
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}
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static int
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time_cmp(void *a, void *b)
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{
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return -ts_cmp(&counts[*((int *) a)].time,
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&counts[*((int *) b)].time);
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}
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static int
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syscall_cmp(void *a, void *b)
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{
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const char *a_name = sysent[*((int *) a)].sys_name;
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const char *b_name = sysent[*((int *) b)].sys_name;
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return strcmp(a_name ? a_name : "", b_name ? b_name : "");
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}
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static int
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count_cmp(void *a, void *b)
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{
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int m = counts[*((int *) a)].calls;
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int n = counts[*((int *) b)].calls;
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return (m < n) ? 1 : (m > n) ? -1 : 0;
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}
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static int (*sortfun)();
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void
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set_sortby(const char *sortby)
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{
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if (strcmp(sortby, "time") == 0)
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sortfun = time_cmp;
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else if (strcmp(sortby, "calls") == 0)
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sortfun = count_cmp;
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else if (strcmp(sortby, "name") == 0)
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sortfun = syscall_cmp;
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else if (strcmp(sortby, "nothing") == 0)
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sortfun = NULL;
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else {
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error_msg_and_help("invalid sortby: '%s'", sortby);
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}
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}
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void set_overhead(int n)
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{
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overhead.tv_sec = n / 1000000;
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overhead.tv_nsec = n % 1000000 * 1000;
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}
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static void
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call_summary_pers(FILE *outf)
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{
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static const char dashes[] = "----------------";
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static const char header[] = "%6.6s %11.11s %11.11s %9.9s %9.9s %s\n";
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static const char data[] = "%6.2f %11.6f %11lu %9u %9.u %s\n";
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static const char summary[] = "%6.6s %11.6f %11.11s %9u %9.u %s\n";
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unsigned int i;
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unsigned int call_cum, error_cum;
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struct timespec tv_cum, dtv;
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double float_tv_cum;
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double percent;
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unsigned int *sorted_count;
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fprintf(outf, header,
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"% time", "seconds", "usecs/call",
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"calls", "errors", "syscall");
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fprintf(outf, header, dashes, dashes, dashes, dashes, dashes, dashes);
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sorted_count = xcalloc(sizeof(sorted_count[0]), nsyscalls);
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call_cum = error_cum = tv_cum.tv_sec = tv_cum.tv_nsec = 0;
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for (i = 0; i < nsyscalls; i++) {
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sorted_count[i] = i;
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if (counts == NULL || counts[i].calls == 0)
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continue;
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ts_mul(&dtv, &overhead, counts[i].calls);
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ts_sub(&counts[i].time, &counts[i].time, &dtv);
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if (counts[i].time.tv_sec < 0 || counts[i].time.tv_nsec < 0)
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counts[i].time.tv_sec = counts[i].time.tv_nsec = 0;
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call_cum += counts[i].calls;
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error_cum += counts[i].errors;
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ts_add(&tv_cum, &tv_cum, &counts[i].time);
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}
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float_tv_cum = ts_float(&tv_cum);
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if (counts) {
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if (sortfun)
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qsort((void *) sorted_count, nsyscalls,
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sizeof(sorted_count[0]), sortfun);
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for (i = 0; i < nsyscalls; i++) {
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double float_syscall_time;
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unsigned int idx = sorted_count[i];
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struct call_counts *cc = &counts[idx];
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if (cc->calls == 0)
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continue;
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ts_div(&dtv, &cc->time, cc->calls);
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float_syscall_time = ts_float(&cc->time);
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percent = (100.0 * float_syscall_time);
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if (percent != 0.0)
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percent /= float_tv_cum;
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/* else: float_tv_cum can be 0.0 too and we get 0/0 = NAN */
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fprintf(outf, data,
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percent, float_syscall_time,
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(long) (1000000 * dtv.tv_sec + dtv.tv_nsec / 1000),
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cc->calls, cc->errors, sysent[idx].sys_name);
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}
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}
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free(sorted_count);
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fprintf(outf, header, dashes, dashes, dashes, dashes, dashes, dashes);
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fprintf(outf, summary,
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"100.00", float_tv_cum, "",
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call_cum, error_cum, "total");
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}
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void
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call_summary(FILE *outf)
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{
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unsigned int i, old_pers = current_personality;
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for (i = 0; i < SUPPORTED_PERSONALITIES; ++i) {
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if (!countv[i])
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continue;
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if (current_personality != i)
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set_personality(i);
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if (i)
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fprintf(outf,
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"System call usage summary for %s mode:\n",
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personality_names[i]);
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call_summary_pers(outf);
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}
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if (old_pers != current_personality)
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set_personality(old_pers);
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}
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