This test would have made the bug fixed in the previous commit obvious. It
would have printed the following:
average=
0007c220
bit 0 1
0 5012 4988
1 5019 4981
2 5154 4846
3 4909 5091
4 5011 4989
5 5021 4979
6 4911 5089
7 4910 5090
8 5011 4989
9 5020 4980
10 5154 4846
11 5021 4979
12 5155 4845
13 5019 4981
14 5153 4847
15 5153 4847
16 5153 4847
17 5153 4847
18 5153 4847
19 5152 4848
20 10000 0
21 10000 0
22 10000 0
23 10000 0
24 10000 0
25 10000 0
26 10000 0
27 10000 0
28 10000 0
29 10000 0
30 10000 0
31 10000 0
(expected values are 5000)
nibble 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
0 696 646 564 693 542 545 612 611 687 663 645 560 674 566 592 704
1 625 589 597 571 638 623 604 663 670 652 650 557 541 683 686 651
2 628 644 659 672 648 569 585 616 623 647 681 600 586 675 601 566
3 683 665 717 549 633 613 701 592 663 531 545 800 623 608 590 487
4 622 657 777 557 720 608 613 598 657 678 551 654 615 596 598 499
5 10000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
6 10000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
7 10000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
(expected values are 625)
#include <config.h>
#include "random.h"
+#include <assert.h>
#include <errno.h>
#include <stdlib.h>
#include <sys/time.h>
}
}
+void
+random_set_seed(uint32_t seed_)
+{
+ assert(seed_);
+ seed = seed_;
+}
+
void
random_bytes(void *p_, size_t n)
{
/*
- * Copyright (c) 2008, 2009 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010 Nicira Networks.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include <stdint.h>
void random_init(void);
+void random_set_seed(uint32_t);
+
void random_bytes(void *, size_t);
uint8_t random_uint8(void);
uint16_t random_uint16(void);
tests/lcov/test-list \
tests/lcov/test-lockfile \
tests/lcov/test-ovsdb \
+ tests/lcov/test-random \
tests/lcov/test-reconnect \
tests/lcov/test-sha1 \
tests/lcov/test-timeval \
tests/valgrind/test-list \
tests/valgrind/test-lockfile \
tests/valgrind/test-ovsdb \
+ tests/valgrind/test-random \
tests/valgrind/test-reconnect \
tests/valgrind/test-sha1 \
tests/valgrind/test-timeval \
tests_test_lockfile_SOURCES = tests/test-lockfile.c
tests_test_lockfile_LDADD = lib/libopenvswitch.a
+noinst_PROGRAMS += tests/test-random
+tests_test_random_SOURCES = tests/test-random.c
+tests_test_random_LDADD = lib/libopenvswitch.a
+
noinst_PROGRAMS += tests/test-unix-socket
tests_test_unix_socket_SOURCES = tests/test-unix-socket.c
tests_test_unix_socket_LDADD = lib/libopenvswitch.a
AT_CHECK([test-byte-order], [0], [ignore])
AT_CLEANUP
+AT_SETUP([test random number generator])
+AT_CHECK([test-random], [0], [dnl
+average=7fa2014f
+
+bit 0 1
+ 0 4946 5054
+ 1 4939 5061
+ 2 4947 5053
+ 3 4935 5065
+ 4 5004 4996
+ 5 4998 5002
+ 6 5062 4938
+ 7 5009 4991
+ 8 5001 4999
+ 9 5022 4978
+ 10 5006 4994
+ 11 5039 4961
+ 12 4940 5060
+ 13 5048 4952
+ 14 4930 5070
+ 15 4973 5027
+ 16 4954 5046
+ 17 5043 4957
+ 18 5020 4980
+ 19 5104 4896
+ 20 5051 4949
+ 21 5003 4997
+ 22 5110 4890
+ 23 4950 5050
+ 24 5016 4984
+ 25 5019 4981
+ 26 4948 5052
+ 27 4995 5005
+ 28 4995 5005
+ 29 4969 5031
+ 30 5109 4891
+ 31 4984 5016
+(expected values are 5000)
+
+nibble 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
+ 0 640 589 610 613 588 632 650 613 582 646 627 640 612 650 637 671
+ 1 626 642 663 620 630 609 617 602 615 638 614 644 641 597 598 644
+ 2 667 611 617 613 609 629 642 651 604 641 594 659 651 610 617 585
+ 3 621 662 594 605 618 644 616 613 613 616 611 608 614 660 653 652
+ 4 641 668 621 664 619 624 625 642 624 629 607 566 599 639 618 614
+ 5 666 629 620 621 581 615 598 620 630 651 671 622 628 603 657 588
+ 6 620 640 621 606 603 644 628 633 620 597 653 591 637 658 634 615
+ 7 636 645 679 593 598 609 612 612 623 626 638 669 603 629 606 622
+(expected values are 625)
+])
+AT_CLEANUP
+
AT_SETUP([test unix socket -- short pathname])
AT_CHECK([test-unix-socket x])
AT_CLEANUP
--- /dev/null
+/*
+ * Copyright (c) 2008, 2009, 2010 Nicira Networks.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <config.h>
+
+#include "random.h"
+
+#include <stdio.h>
+#include <string.h>
+
+int
+main(void)
+{
+ enum { N_ROUNDS = 10000 };
+ unsigned long long int total;
+ int hist16[8][16];
+ int hist2[32];
+ int i;
+
+ random_set_seed(1);
+
+ total = 0;
+ memset(hist2, 0, sizeof hist2);
+ memset(hist16, 0, sizeof hist16);
+ for (i = 0; i < N_ROUNDS; i++) {
+ uint32_t x;
+ int j;
+
+ x = random_uint32();
+
+ total += x;
+
+ for (j = 0; j < 32; j++) {
+ if (x & (1u << j)) {
+ hist2[j]++;
+ }
+ }
+
+ for (j = 0; j < 8; j++) {
+ hist16[j][(x >> (j * 4)) & 15]++;
+ }
+ }
+
+ printf("average=%08llx\n", total / N_ROUNDS);
+
+ printf("\nbit 0 1\n");
+ for (i = 0; i < 32; i++) {
+ printf("%3d %5d %5d\n", i, N_ROUNDS - hist2[i], hist2[i]);
+ }
+ printf("(expected values are %d)\n", N_ROUNDS / 2);
+
+ printf("\nnibble 0 1 2 3 4 5 6 7 8 9 10 11 12 "
+ "13 14 15\n");
+ for (i = 0; i < 8; i++) {
+ int j;
+
+ printf("%6d", i);
+ for (j = 0; j < 16; j++) {
+ printf(" %3d", hist16[i][j]);
+ }
+ printf("\n");
+ }
+ printf("(expected values are %d)\n", N_ROUNDS / 16);
+
+ return 0;
+}
projects / openvswitch / commitdiff