1 /* 2 * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl> 3 * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl> 4 * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com> 5 * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl> 6 * Copyright (c) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation 7 * Linux for s390 port by D.J. Barrow 8 * <barrow_dj@mail.yahoo.com,djbarrow@de.ibm.com> 9 * Copyright (c) 2004 Roland McGrath <roland@redhat.com> 10 * Copyright (c) 2006 Dmitry V. Levin <ldv@altlinux.org> 11 * All rights reserved. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. The name of the author may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 #include "defs.h" 37 38 /* Per-syscall stats structure */ 39 struct call_counts { 40 /* time may be total latency or system time */ 41 struct timeval time; 42 int calls, errors; 43 }; 44 45 static struct call_counts *countv[SUPPORTED_PERSONALITIES]; 46 #define counts (countv[current_personality]) 47 48 static struct timeval shortest = { 1000000, 0 }; 49 50 void count_syscall(struct tcb * tcp,const struct timeval * syscall_exiting_tv)51 count_syscall(struct tcb *tcp, const struct timeval *syscall_exiting_tv) 52 { 53 struct timeval wtv; 54 struct timeval *tv = &wtv; 55 struct call_counts *cc; 56 unsigned long scno = tcp->scno; 57 58 if (!SCNO_IN_RANGE(scno)) 59 return; 60 61 if (!counts) 62 counts = xcalloc(nsyscalls, sizeof(*counts)); 63 cc = &counts[scno]; 64 65 cc->calls++; 66 if (tcp->u_error) 67 cc->errors++; 68 69 /* tv = wall clock time spent while in syscall */ 70 tv_sub(tv, syscall_exiting_tv, &tcp->etime); 71 72 /* Spent more wall clock time than spent system time? (usually yes) */ 73 if (tv_cmp(tv, &tcp->dtime) > 0) { 74 static struct timeval one_tick = { -1, 0 }; 75 76 if (one_tick.tv_sec == -1) { 77 /* Initialize it. */ 78 struct itimerval it; 79 80 memset(&it, 0, sizeof it); 81 it.it_interval.tv_usec = 1; 82 setitimer(ITIMER_REAL, &it, NULL); 83 getitimer(ITIMER_REAL, &it); 84 one_tick = it.it_interval; 85 //FIXME: this hack doesn't work (tested on linux-3.6.11): one_tick = 0.000000 86 //tprintf(" one_tick.tv_usec:%u\n", (unsigned)one_tick.tv_usec); 87 } 88 89 if (tv_nz(&tcp->dtime)) 90 /* tv = system time spent, if it isn't 0 */ 91 tv = &tcp->dtime; 92 else if (tv_cmp(tv, &one_tick) > 0) { 93 /* tv = smallest "sane" time interval */ 94 if (tv_cmp(&shortest, &one_tick) < 0) 95 tv = &shortest; 96 else 97 tv = &one_tick; 98 } 99 } 100 if (tv_cmp(tv, &shortest) < 0) 101 shortest = *tv; 102 tv_add(&cc->time, &cc->time, count_wallclock ? &wtv : tv); 103 } 104 105 static int time_cmp(void * a,void * b)106 time_cmp(void *a, void *b) 107 { 108 return -tv_cmp(&counts[*((int *) a)].time, 109 &counts[*((int *) b)].time); 110 } 111 112 static int syscall_cmp(void * a,void * b)113 syscall_cmp(void *a, void *b) 114 { 115 return strcmp(sysent[*((int *) a)].sys_name, 116 sysent[*((int *) b)].sys_name); 117 } 118 119 static int count_cmp(void * a,void * b)120 count_cmp(void *a, void *b) 121 { 122 int m = counts[*((int *) a)].calls; 123 int n = counts[*((int *) b)].calls; 124 125 return (m < n) ? 1 : (m > n) ? -1 : 0; 126 } 127 128 static int (*sortfun)(); 129 static struct timeval overhead = { -1, -1 }; 130 131 void set_sortby(const char * sortby)132 set_sortby(const char *sortby) 133 { 134 if (strcmp(sortby, "time") == 0) 135 sortfun = time_cmp; 136 else if (strcmp(sortby, "calls") == 0) 137 sortfun = count_cmp; 138 else if (strcmp(sortby, "name") == 0) 139 sortfun = syscall_cmp; 140 else if (strcmp(sortby, "nothing") == 0) 141 sortfun = NULL; 142 else { 143 error_msg_and_help("invalid sortby: '%s'", sortby); 144 } 145 } 146 set_overhead(int n)147 void set_overhead(int n) 148 { 149 overhead.tv_sec = n / 1000000; 150 overhead.tv_usec = n % 1000000; 151 } 152 153 static void call_summary_pers(FILE * outf)154 call_summary_pers(FILE *outf) 155 { 156 unsigned int i; 157 int call_cum, error_cum; 158 struct timeval tv_cum, dtv; 159 double float_tv_cum; 160 double percent; 161 const char *dashes = "----------------"; 162 char error_str[sizeof(int)*3]; 163 int *sorted_count; 164 165 fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %s\n", 166 "% time", "seconds", "usecs/call", 167 "calls", "errors", "syscall"); 168 fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %s\n", 169 dashes, dashes, dashes, dashes, dashes, dashes); 170 171 sorted_count = xcalloc(sizeof(int), nsyscalls); 172 call_cum = error_cum = tv_cum.tv_sec = tv_cum.tv_usec = 0; 173 if (overhead.tv_sec == -1) { 174 tv_mul(&overhead, &shortest, 8); 175 tv_div(&overhead, &overhead, 10); 176 } 177 for (i = 0; i < nsyscalls; i++) { 178 sorted_count[i] = i; 179 if (counts == NULL || counts[i].calls == 0) 180 continue; 181 tv_mul(&dtv, &overhead, counts[i].calls); 182 tv_sub(&counts[i].time, &counts[i].time, &dtv); 183 call_cum += counts[i].calls; 184 error_cum += counts[i].errors; 185 tv_add(&tv_cum, &tv_cum, &counts[i].time); 186 } 187 float_tv_cum = tv_float(&tv_cum); 188 if (counts) { 189 if (sortfun) 190 qsort((void *) sorted_count, nsyscalls, sizeof(int), sortfun); 191 for (i = 0; i < nsyscalls; i++) { 192 double float_syscall_time; 193 int idx = sorted_count[i]; 194 struct call_counts *cc = &counts[idx]; 195 if (cc->calls == 0) 196 continue; 197 tv_div(&dtv, &cc->time, cc->calls); 198 error_str[0] = '\0'; 199 if (cc->errors) 200 sprintf(error_str, "%u", cc->errors); 201 float_syscall_time = tv_float(&cc->time); 202 percent = (100.0 * float_syscall_time); 203 if (percent != 0.0) 204 percent /= float_tv_cum; 205 /* else: float_tv_cum can be 0.0 too and we get 0/0 = NAN */ 206 fprintf(outf, "%6.2f %11.6f %11lu %9u %9.9s %s\n", 207 percent, float_syscall_time, 208 (long) (1000000 * dtv.tv_sec + dtv.tv_usec), 209 cc->calls, 210 error_str, sysent[idx].sys_name); 211 } 212 } 213 free(sorted_count); 214 215 fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %s\n", 216 dashes, dashes, dashes, dashes, dashes, dashes); 217 error_str[0] = '\0'; 218 if (error_cum) 219 sprintf(error_str, "%u", error_cum); 220 fprintf(outf, "%6.6s %11.6f %11.11s %9u %9.9s %s\n", 221 "100.00", float_tv_cum, "", 222 call_cum, error_str, "total"); 223 } 224 225 void call_summary(FILE * outf)226 call_summary(FILE *outf) 227 { 228 unsigned int i, old_pers = current_personality; 229 230 for (i = 0; i < SUPPORTED_PERSONALITIES; ++i) { 231 if (!countv[i]) 232 continue; 233 234 if (current_personality != i) 235 set_personality(i); 236 if (i) 237 fprintf(outf, 238 "System call usage summary for %d bit mode:\n", 239 current_wordsize * 8); 240 call_summary_pers(outf); 241 } 242 243 if (old_pers != current_personality) 244 set_personality(old_pers); 245 } 246