| /* |
| * Copyright (c) International Business Machines Corp., 2005 |
| * Copyright (c) Wipro Technologies Ltd, 2005. All Rights Reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it would be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * AUTHORS: |
| * Prashant P Yendigeri <prashant.yendigeri@wipro.com> |
| * Robbie Williamson <robbiew@us.ibm.com> |
| * |
| * DESCRIPTION |
| * This is a Phase I test for the pselect01(2) system call. |
| * It is intended to provide a limited exposure of the system call. |
| * |
| **********************************************************/ |
| |
| #include <stdio.h> |
| #include <fcntl.h> |
| #include <sys/select.h> |
| #include <sys/time.h> |
| #include <sys/types.h> |
| #include <time.h> |
| #include <unistd.h> |
| #include <errno.h> |
| #include <stdint.h> |
| |
| #include "test.h" |
| #include "safe_macros.h" |
| |
| static void setup(void); |
| static void cleanup(void); |
| |
| TCID_DEFINE(pselect01); |
| int TST_TOTAL = 9; |
| |
| #define FILENAME "pselect01_test" |
| #define LOOP_COUNT 4 |
| |
| static int fd; |
| |
| static void pselect_verify(void) |
| { |
| fd_set readfds; |
| struct timespec tv, tv_start, tv_end; |
| long real_nsec, total_nsec; |
| double real_sec; |
| int total_sec, retval; |
| FD_ZERO(&readfds); |
| FD_SET(fd, &readfds); |
| tv.tv_sec = 0; |
| tv.tv_nsec = 0; |
| |
| retval = pselect(fd, &readfds, 0, 0, &tv, NULL); |
| if (retval >= 0) |
| tst_resm(TPASS, "pselect() succeeded retval=%i", retval); |
| else |
| tst_resm(TFAIL | TERRNO, "pselect() failed unexpectedly"); |
| |
| for (total_sec = 1; total_sec <= LOOP_COUNT; total_sec++) { |
| FD_ZERO(&readfds); |
| FD_SET(0, &readfds); |
| |
| tv.tv_sec = total_sec; |
| tv.tv_nsec = 0; |
| |
| tst_resm(TINFO, |
| "Testing basic pselect sanity,Sleeping for %jd secs", |
| (intmax_t) tv.tv_sec); |
| clock_gettime(CLOCK_REALTIME, &tv_start); |
| pselect(0, &readfds, NULL, NULL, &tv, NULL); |
| clock_gettime(CLOCK_REALTIME, &tv_end); |
| |
| real_sec = (0.5 + (tv_end.tv_sec - tv_start.tv_sec + |
| 1e-9 * (tv_end.tv_nsec - tv_start.tv_nsec))); |
| if (abs(real_sec - total_sec) < 0.2 * total_sec) |
| tst_resm(TPASS, "Sleep time was correct " |
| "(%lf/%d < 20 %%)", real_sec, total_sec); |
| else |
| tst_resm(TFAIL, "Sleep time was incorrect (%d/%lf " |
| ">= 20%%)", total_sec, real_sec); |
| } |
| |
| #ifdef DEBUG |
| tst_resm(TINFO, "Now checking nsec sleep precision"); |
| #endif |
| for (total_nsec = 1e8; total_nsec <= LOOP_COUNT * 1e8; |
| total_nsec += 1e8) { |
| FD_ZERO(&readfds); |
| FD_SET(0, &readfds); |
| |
| tv.tv_sec = 0; |
| tv.tv_nsec = total_nsec; |
| |
| tst_resm(TINFO, |
| "Testing basic pselect sanity,Sleeping for %ld nano secs", |
| tv.tv_nsec); |
| clock_gettime(CLOCK_REALTIME, &tv_start); |
| pselect(0, &readfds, NULL, NULL, &tv, NULL); |
| clock_gettime(CLOCK_REALTIME, &tv_end); |
| |
| real_nsec = (tv_end.tv_sec - tv_start.tv_sec) * 1e9 + |
| tv_end.tv_nsec - tv_start.tv_nsec; |
| |
| /* allow 20% error */ |
| if (abs(real_nsec - tv.tv_nsec) < 0.2 * total_nsec) { |
| tst_resm(TPASS, "Sleep time was correct"); |
| } else { |
| tst_resm(TWARN, |
| "This test could fail if the system was under load"); |
| tst_resm(TWARN, |
| "due to the limitation of the way it calculates the"); |
| tst_resm(TWARN, "system call execution time."); |
| tst_resm(TFAIL, |
| "Sleep time was incorrect:%ld nsec vs expected %ld nsec", |
| real_nsec, total_nsec); |
| } |
| } |
| } |
| |
| int main(int argc, char *argv[]) |
| { |
| const char *msg; |
| int lc; |
| |
| msg = parse_opts(argc, argv, NULL, NULL); |
| if (msg != NULL) |
| tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| |
| setup(); |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| tst_count = 0; |
| pselect_verify(); |
| } |
| |
| cleanup(); |
| tst_exit(); |
| } |
| |
| static void setup(void) |
| { |
| tst_sig(NOFORK, DEF_HANDLER, cleanup); |
| tst_tmpdir(); |
| |
| fd = SAFE_OPEN(cleanup, FILENAME, O_CREAT | O_RDWR, 0777); |
| |
| TEST_PAUSE; |
| } |
| |
| static void cleanup(void) |
| { |
| if (fd && close(fd)) |
| tst_resm(TWARN | TERRNO, "close() failed"); |
| |
| tst_rmdir(); |
| } |