t_sleep.c revision 1.5.2.2
1 1.5.2.2 pgoyette /* $NetBSD: t_sleep.c,v 1.5.2.2 2012/11/09 20:13:25 pgoyette Exp $ */ 2 1.5.2.2 pgoyette 3 1.5.2.2 pgoyette /*- 4 1.5.2.2 pgoyette * Copyright (c) 2006 Frank Kardel 5 1.5.2.2 pgoyette * All rights reserved. 6 1.5.2.2 pgoyette * 7 1.5.2.2 pgoyette * Redistribution and use in source and binary forms, with or without 8 1.5.2.2 pgoyette * modification, are permitted provided that the following conditions 9 1.5.2.2 pgoyette * are met: 10 1.5.2.2 pgoyette * 1. Redistributions of source code must retain the above copyright 11 1.5.2.2 pgoyette * notice, this list of conditions and the following disclaimer. 12 1.5.2.2 pgoyette * 2. Redistributions in binary form must reproduce the above copyright 13 1.5.2.2 pgoyette * notice, this list of conditions and the following disclaimer in the 14 1.5.2.2 pgoyette * documentation and/or other materials provided with the distribution. 15 1.5.2.2 pgoyette * 16 1.5.2.2 pgoyette * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 1.5.2.2 pgoyette * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 1.5.2.2 pgoyette * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 1.5.2.2 pgoyette * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 1.5.2.2 pgoyette * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 1.5.2.2 pgoyette * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 1.5.2.2 pgoyette * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 1.5.2.2 pgoyette * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 1.5.2.2 pgoyette * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 1.5.2.2 pgoyette * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 1.5.2.2 pgoyette * POSSIBILITY OF SUCH DAMAGE. 27 1.5.2.2 pgoyette */ 28 1.5.2.2 pgoyette 29 1.5.2.2 pgoyette #include <atf-c.h> 30 1.5.2.2 pgoyette #include <errno.h> 31 1.5.2.2 pgoyette #include <poll.h> 32 1.5.2.2 pgoyette #include <stdio.h> 33 1.5.2.2 pgoyette #include <stdlib.h> 34 1.5.2.2 pgoyette #include <string.h> 35 1.5.2.2 pgoyette #include <time.h> 36 1.5.2.2 pgoyette #include <unistd.h> 37 1.5.2.2 pgoyette 38 1.5.2.2 pgoyette #include <sys/cdefs.h> 39 1.5.2.2 pgoyette #include <sys/event.h> 40 1.5.2.2 pgoyette #include <sys/signal.h> 41 1.5.2.2 pgoyette 42 1.5.2.2 pgoyette #define BILLION 1000000000LL /* nano-seconds per second */ 43 1.5.2.2 pgoyette #define MILLION 1000000LL /* nano-seconds per milli-second */ 44 1.5.2.2 pgoyette 45 1.5.2.2 pgoyette #define ALARM 6 /* SIGALRM after this many seconds */ 46 1.5.2.2 pgoyette #define MAXSLEEP 22 /* Maximum delay in seconds */ 47 1.5.2.2 pgoyette #define KEVNT_TIMEOUT 10300 /* measured in milli-seconds */ 48 1.5.2.2 pgoyette #define FUZZ (40 * MILLION) /* scheduling fuzz accepted - 40 ms */ 49 1.5.2.2 pgoyette 50 1.5.2.2 pgoyette /* 51 1.5.2.2 pgoyette * Timer notes 52 1.5.2.2 pgoyette * 53 1.5.2.2 pgoyette * Most tests use FUZZ as their initial delay value, but 'sleep' 54 1.5.2.2 pgoyette * starts at 1sec (since it cannot handle sub-second intervals). 55 1.5.2.2 pgoyette * Subsequent passes double the previous interval, up to MAXSLEEP. 56 1.5.2.2 pgoyette * 57 1.5.2.2 pgoyette * The current values result in 5 passes for the 'sleep' test (at 1, 58 1.5.2.2 pgoyette * 2, 4, 8, and 16 seconds) and 10 passes for the other tests (at 59 1.5.2.2 pgoyette * 0.04, 0.08, 0.16, 0.32, 0.64, 1.28, 2.56, 5.12, 10.24, and 20.48 60 1.5.2.2 pgoyette * seconds). 61 1.5.2.2 pgoyette * 62 1.5.2.2 pgoyette * The ALARM is only set if the current pass's delay is longer, and 63 1.5.2.2 pgoyette * only if the ALARM has not already been triggered. 64 1.5.2.2 pgoyette * 65 1.5.2.2 pgoyette * The 'kevent' test needs the ALARM to be set on a different pass 66 1.5.2.2 pgoyette * from when the KEVNT_TIMEOUT fires. So set ALARM to fire on the 67 1.5.2.2 pgoyette * penultimate pass, and the KEVNT_TIMEOUT on the final pass. We 68 1.5.2.2 pgoyette * set KEVNT_TIMEOUT just barely long enough to put it into the 69 1.5.2.2 pgoyette * last test pass, and set MAXSLEEP a couple seconds longer than 70 1.5.2.2 pgoyette * necessary,in order to avoid a QEMU bug which nearly doubles 71 1.5.2.2 pgoyette * some timers. 72 1.5.2.2 pgoyette */ 73 1.5.2.2 pgoyette 74 1.5.2.2 pgoyette static volatile int sig; 75 1.5.2.2 pgoyette 76 1.5.2.2 pgoyette int sleeptest(int (*)(struct timespec *, struct timespec *), bool, bool); 77 1.5.2.2 pgoyette int do_nanosleep(struct timespec *, struct timespec *); 78 1.5.2.2 pgoyette int do_select(struct timespec *, struct timespec *); 79 1.5.2.2 pgoyette int do_poll(struct timespec *, struct timespec *); 80 1.5.2.2 pgoyette int do_sleep(struct timespec *, struct timespec *); 81 1.5.2.2 pgoyette int do_kevent(struct timespec *, struct timespec *); 82 1.5.2.2 pgoyette void sigalrm(int); 83 1.5.2.2 pgoyette 84 1.5.2.2 pgoyette void 85 1.5.2.2 pgoyette sigalrm(int s) 86 1.5.2.2 pgoyette { 87 1.5.2.2 pgoyette 88 1.5.2.2 pgoyette sig++; 89 1.5.2.2 pgoyette } 90 1.5.2.2 pgoyette 91 1.5.2.2 pgoyette int 92 1.5.2.2 pgoyette do_nanosleep(struct timespec *delay, struct timespec *remain) 93 1.5.2.2 pgoyette { 94 1.5.2.2 pgoyette int ret; 95 1.5.2.2 pgoyette 96 1.5.2.2 pgoyette if (nanosleep(delay, remain) == -1) 97 1.5.2.2 pgoyette ret = (errno == EINTR ? 0 : errno); 98 1.5.2.2 pgoyette else 99 1.5.2.2 pgoyette ret = 0; 100 1.5.2.2 pgoyette return ret; 101 1.5.2.2 pgoyette } 102 1.5.2.2 pgoyette 103 1.5.2.2 pgoyette int 104 1.5.2.2 pgoyette do_select(struct timespec *delay, struct timespec *remain) 105 1.5.2.2 pgoyette { 106 1.5.2.2 pgoyette int ret; 107 1.5.2.2 pgoyette struct timeval tv; 108 1.5.2.2 pgoyette 109 1.5.2.2 pgoyette TIMESPEC_TO_TIMEVAL(&tv, delay); 110 1.5.2.2 pgoyette if (select(0, NULL, NULL, NULL, &tv) == -1) 111 1.5.2.2 pgoyette ret = (errno == EINTR ? 0 : errno); 112 1.5.2.2 pgoyette else 113 1.5.2.2 pgoyette ret = 0; 114 1.5.2.2 pgoyette return ret; 115 1.5.2.2 pgoyette } 116 1.5.2.2 pgoyette 117 1.5.2.2 pgoyette int 118 1.5.2.2 pgoyette do_poll(struct timespec *delay, struct timespec *remain) 119 1.5.2.2 pgoyette { 120 1.5.2.2 pgoyette int ret; 121 1.5.2.2 pgoyette struct timeval tv; 122 1.5.2.2 pgoyette 123 1.5.2.2 pgoyette TIMESPEC_TO_TIMEVAL(&tv, delay); 124 1.5.2.2 pgoyette if (pollts(NULL, 0, delay, NULL) == -1) 125 1.5.2.2 pgoyette ret = (errno == EINTR ? 0 : errno); 126 1.5.2.2 pgoyette else 127 1.5.2.2 pgoyette ret = 0; 128 1.5.2.2 pgoyette return ret; 129 1.5.2.2 pgoyette } 130 1.5.2.2 pgoyette 131 1.5.2.2 pgoyette int 132 1.5.2.2 pgoyette do_sleep(struct timespec *delay, struct timespec *remain) 133 1.5.2.2 pgoyette { 134 1.5.2.2 pgoyette struct timeval tv; 135 1.5.2.2 pgoyette 136 1.5.2.2 pgoyette TIMESPEC_TO_TIMEVAL(&tv, delay); 137 1.5.2.2 pgoyette remain->tv_sec = sleep(delay->tv_sec); 138 1.5.2.2 pgoyette remain->tv_nsec = 0; 139 1.5.2.2 pgoyette 140 1.5.2.2 pgoyette return 0; 141 1.5.2.2 pgoyette } 142 1.5.2.2 pgoyette 143 1.5.2.2 pgoyette int 144 1.5.2.2 pgoyette do_kevent(struct timespec *delay, struct timespec *remain) 145 1.5.2.2 pgoyette { 146 1.5.2.2 pgoyette struct kevent ktimer; 147 1.5.2.2 pgoyette struct kevent kresult; 148 1.5.2.2 pgoyette int rtc, kq, kerrno; 149 1.5.2.2 pgoyette int tmo; 150 1.5.2.2 pgoyette 151 1.5.2.2 pgoyette ATF_REQUIRE_MSG((kq = kqueue()) != -1, "kqueue: %s", strerror(errno)); 152 1.5.2.2 pgoyette 153 1.5.2.2 pgoyette tmo = KEVNT_TIMEOUT; 154 1.5.2.2 pgoyette 155 1.5.2.2 pgoyette /* 156 1.5.2.2 pgoyette * If we expect the KEVNT_TIMEOUT to fire, and we're running 157 1.5.2.2 pgoyette * under QEMU, make sure the delay is long enough to account 158 1.5.2.2 pgoyette * for the effects of PR kern/43997 ! 159 1.5.2.2 pgoyette */ 160 1.5.2.2 pgoyette if (system("cpuctl identify 0 | grep -q QEMU") == 0 && 161 1.5.2.2 pgoyette tmo/1000 < delay->tv_sec && tmo/500 > delay->tv_sec) 162 1.5.2.2 pgoyette delay->tv_sec = MAXSLEEP; 163 1.5.2.2 pgoyette 164 1.5.2.2 pgoyette EV_SET(&ktimer, 1, EVFILT_TIMER, EV_ADD, 0, tmo, 0); 165 1.5.2.2 pgoyette 166 1.5.2.2 pgoyette rtc = kevent(kq, &ktimer, 1, &kresult, 1, delay); 167 1.5.2.2 pgoyette kerrno = errno; 168 1.5.2.2 pgoyette 169 1.5.2.2 pgoyette (void)close(kq); 170 1.5.2.2 pgoyette 171 1.5.2.2 pgoyette if (rtc == -1) { 172 1.5.2.2 pgoyette ATF_REQUIRE_MSG(kerrno == EINTR, "kevent: %s", strerror(errno)); 173 1.5.2.2 pgoyette return 0; 174 1.5.2.2 pgoyette } 175 1.5.2.2 pgoyette 176 1.5.2.2 pgoyette if (delay->tv_sec * BILLION + delay->tv_nsec > tmo * MILLION) 177 1.5.2.2 pgoyette ATF_REQUIRE_MSG(rtc > 0, 178 1.5.2.2 pgoyette "kevent: KEVNT_TIMEOUT did not cause EVFILT_TIMER event"); 179 1.5.2.2 pgoyette 180 1.5.2.2 pgoyette return 0; 181 1.5.2.2 pgoyette } 182 1.5.2.2 pgoyette 183 1.5.2.2 pgoyette ATF_TC(nanosleep); 184 1.5.2.2 pgoyette ATF_TC_HEAD(nanosleep, tc) 185 1.5.2.2 pgoyette { 186 1.5.2.2 pgoyette 187 1.5.2.2 pgoyette atf_tc_set_md_var(tc, "descr", "Test nanosleep(2) timing"); 188 1.5.2.2 pgoyette atf_tc_set_md_var(tc, "timeout", "65"); 189 1.5.2.2 pgoyette } 190 1.5.2.2 pgoyette 191 1.5.2.2 pgoyette ATF_TC_BODY(nanosleep, tc) 192 1.5.2.2 pgoyette { 193 1.5.2.2 pgoyette 194 1.5.2.2 pgoyette sleeptest(do_nanosleep, true, false); 195 1.5.2.2 pgoyette } 196 1.5.2.2 pgoyette 197 1.5.2.2 pgoyette ATF_TC(select); 198 1.5.2.2 pgoyette ATF_TC_HEAD(select, tc) 199 1.5.2.2 pgoyette { 200 1.5.2.2 pgoyette 201 1.5.2.2 pgoyette atf_tc_set_md_var(tc, "descr", "Test select(2) timing"); 202 1.5.2.2 pgoyette atf_tc_set_md_var(tc, "timeout", "65"); 203 1.5.2.2 pgoyette } 204 1.5.2.2 pgoyette 205 1.5.2.2 pgoyette ATF_TC_BODY(select, tc) 206 1.5.2.2 pgoyette { 207 1.5.2.2 pgoyette 208 1.5.2.2 pgoyette sleeptest(do_select, true, true); 209 1.5.2.2 pgoyette } 210 1.5.2.2 pgoyette 211 1.5.2.2 pgoyette ATF_TC(poll); 212 1.5.2.2 pgoyette ATF_TC_HEAD(poll, tc) 213 1.5.2.2 pgoyette { 214 1.5.2.2 pgoyette 215 1.5.2.2 pgoyette atf_tc_set_md_var(tc, "descr", "Test poll(2) timing"); 216 1.5.2.2 pgoyette atf_tc_set_md_var(tc, "timeout", "65"); 217 1.5.2.2 pgoyette } 218 1.5.2.2 pgoyette 219 1.5.2.2 pgoyette ATF_TC_BODY(poll, tc) 220 1.5.2.2 pgoyette { 221 1.5.2.2 pgoyette 222 1.5.2.2 pgoyette sleeptest(do_poll, true, true); 223 1.5.2.2 pgoyette } 224 1.5.2.2 pgoyette 225 1.5.2.2 pgoyette ATF_TC(sleep); 226 1.5.2.2 pgoyette ATF_TC_HEAD(sleep, tc) 227 1.5.2.2 pgoyette { 228 1.5.2.2 pgoyette 229 1.5.2.2 pgoyette atf_tc_set_md_var(tc, "descr", "Test sleep(3) timing"); 230 1.5.2.2 pgoyette atf_tc_set_md_var(tc, "timeout", "65"); 231 1.5.2.2 pgoyette } 232 1.5.2.2 pgoyette 233 1.5.2.2 pgoyette ATF_TC_BODY(sleep, tc) 234 1.5.2.2 pgoyette { 235 1.5.2.2 pgoyette 236 1.5.2.2 pgoyette sleeptest(do_sleep, false, false); 237 1.5.2.2 pgoyette } 238 1.5.2.2 pgoyette 239 1.5.2.2 pgoyette ATF_TC(kevent); 240 1.5.2.2 pgoyette ATF_TC_HEAD(kevent, tc) 241 1.5.2.2 pgoyette { 242 1.5.2.2 pgoyette 243 1.5.2.2 pgoyette atf_tc_set_md_var(tc, "descr", "Test kevent(2) timing"); 244 1.5.2.2 pgoyette atf_tc_set_md_var(tc, "timeout", "65"); 245 1.5.2.2 pgoyette } 246 1.5.2.2 pgoyette 247 1.5.2.2 pgoyette ATF_TC_BODY(kevent, tc) 248 1.5.2.2 pgoyette { 249 1.5.2.2 pgoyette 250 1.5.2.2 pgoyette sleeptest(do_kevent, true, true); 251 1.5.2.2 pgoyette } 252 1.5.2.2 pgoyette 253 1.5.2.2 pgoyette int 254 1.5.2.2 pgoyette sleeptest(int (*test)(struct timespec *, struct timespec *), 255 1.5.2.2 pgoyette bool subsec, bool sim_remain) 256 1.5.2.2 pgoyette { 257 1.5.2.2 pgoyette struct timespec tsa, tsb, tslp, tremain; 258 1.5.2.2 pgoyette int64_t delta1, delta2, delta3, round; 259 1.5.2.2 pgoyette 260 1.5.2.2 pgoyette sig = 0; 261 1.5.2.2 pgoyette signal(SIGALRM, sigalrm); 262 1.5.2.2 pgoyette 263 1.5.2.2 pgoyette if (subsec) { 264 1.5.2.2 pgoyette round = 1; 265 1.5.2.2 pgoyette delta3 = FUZZ; 266 1.5.2.2 pgoyette } else { 267 1.5.2.2 pgoyette round = 1000000000; 268 1.5.2.2 pgoyette delta3 = round; 269 1.5.2.2 pgoyette } 270 1.5.2.2 pgoyette 271 1.5.2.2 pgoyette tslp.tv_sec = delta3 / 1000000000; 272 1.5.2.2 pgoyette tslp.tv_nsec = delta3 % 1000000000; 273 1.5.2.2 pgoyette 274 1.5.2.2 pgoyette while (tslp.tv_sec <= MAXSLEEP) { 275 1.5.2.2 pgoyette /* 276 1.5.2.2 pgoyette * disturb sleep by signal on purpose 277 1.5.2.2 pgoyette */ 278 1.5.2.2 pgoyette if (tslp.tv_sec > ALARM && sig == 0) 279 1.5.2.2 pgoyette alarm(ALARM); 280 1.5.2.2 pgoyette 281 1.5.2.2 pgoyette clock_gettime(CLOCK_REALTIME, &tsa); 282 1.5.2.2 pgoyette (*test)(&tslp, &tremain); 283 1.5.2.2 pgoyette clock_gettime(CLOCK_REALTIME, &tsb); 284 1.5.2.2 pgoyette 285 1.5.2.2 pgoyette if (sim_remain) { 286 1.5.2.2 pgoyette timespecsub(&tsb, &tsa, &tremain); 287 1.5.2.2 pgoyette timespecsub(&tslp, &tremain, &tremain); 288 1.5.2.2 pgoyette } 289 1.5.2.2 pgoyette 290 1.5.2.2 pgoyette delta1 = (int64_t)tsb.tv_sec - (int64_t)tsa.tv_sec; 291 1.5.2.2 pgoyette delta1 *= BILLION; 292 1.5.2.2 pgoyette delta1 += (int64_t)tsb.tv_nsec - (int64_t)tsa.tv_nsec; 293 1.5.2.2 pgoyette 294 1.5.2.2 pgoyette delta2 = (int64_t)tremain.tv_sec * BILLION; 295 1.5.2.2 pgoyette delta2 += (int64_t)tremain.tv_nsec; 296 1.5.2.2 pgoyette 297 1.5.2.2 pgoyette delta3 = (int64_t)tslp.tv_sec * BILLION; 298 1.5.2.2 pgoyette delta3 += (int64_t)tslp.tv_nsec - delta1 - delta2; 299 1.5.2.2 pgoyette 300 1.5.2.2 pgoyette delta3 /= round; 301 1.5.2.2 pgoyette delta3 *= round; 302 1.5.2.2 pgoyette 303 1.5.2.2 pgoyette if (delta3 > FUZZ || delta3 < -FUZZ) { 304 1.5.2.2 pgoyette if (!sim_remain && 305 1.5.2.2 pgoyette system("cpuctl identify 0 | grep -q QEMU") == 0) 306 1.5.2.2 pgoyette atf_tc_expect_fail("Long reschedule latency " 307 1.5.2.2 pgoyette "due to PR kern/43997"); 308 1.5.2.2 pgoyette 309 1.5.2.2 pgoyette atf_tc_fail("Reschedule latency %"PRId64" exceeds " 310 1.5.2.2 pgoyette "allowable fuzz %lld", delta3, FUZZ); 311 1.5.2.2 pgoyette } 312 1.5.2.2 pgoyette delta3 = (int64_t)tslp.tv_sec * 2 * BILLION; 313 1.5.2.2 pgoyette delta3 += (int64_t)tslp.tv_nsec * 2; 314 1.5.2.2 pgoyette 315 1.5.2.2 pgoyette delta3 /= round; 316 1.5.2.2 pgoyette delta3 *= round; 317 1.5.2.2 pgoyette if (delta3 < FUZZ) 318 1.5.2.2 pgoyette break; 319 1.5.2.2 pgoyette tslp.tv_sec = delta3 / BILLION; 320 1.5.2.2 pgoyette tslp.tv_nsec = delta3 % BILLION; 321 1.5.2.2 pgoyette } 322 1.5.2.2 pgoyette ATF_REQUIRE_MSG(sig == 1, "Alarm did not fire!"); 323 1.5.2.2 pgoyette 324 1.5.2.2 pgoyette atf_tc_pass(); 325 1.5.2.2 pgoyette } 326 1.5.2.2 pgoyette 327 1.5.2.2 pgoyette ATF_TP_ADD_TCS(tp) 328 1.5.2.2 pgoyette { 329 1.5.2.2 pgoyette ATF_TP_ADD_TC(tp, nanosleep); 330 1.5.2.2 pgoyette ATF_TP_ADD_TC(tp, select); 331 1.5.2.2 pgoyette ATF_TP_ADD_TC(tp, poll); 332 1.5.2.2 pgoyette ATF_TP_ADD_TC(tp, sleep); 333 1.5.2.2 pgoyette ATF_TP_ADD_TC(tp, kevent); 334 1.5.2.2 pgoyette 335 1.5.2.2 pgoyette return atf_no_error(); 336 1.5.2.2 pgoyette } 337
Indexes created Tue Sep 30 20:09:53 GMT 2025