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tests/unit/test-iov: Fix timeout problem on NetBSD and OpenBSD

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The test-iov code uses usleep() with small values (<= 30) in some
nested loops with many iterations. This causes a small delay on OSes
like Linux that have a precise sleeping mechanism, but on systems
like NetBSD and OpenBSD, each usleep() call takes multiple microseconds,
which then sum up in a total test time of multiple minutes!

Looking at the code, the usleep() does not really seem to be necessary
here - if not enough data could be send, we should simply always use
select() to wait 'til we can send more. Thus remove the usleep() and
re-arrange the code a little bit to make it more clear what is going
on here.

Suggested-by: "Daniel P. Berrangé" <berrange@redhat.com>
Message-ID: <20240122153347.71654-1-thuth@redhat.com>
Reviewed-by: "Daniel P. Berrangé" <berrange@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Thomas Huth 2024-01-22 16:33:47 +01:00
parent a1f5a47b60
commit e2c41766a9
1 changed files with 11 additions and 9 deletions
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20
tests/unit/test-iov.c
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@ -197,15 +197,17 @@ static void test_io(void)
s = g_test_rand_int_range(0, j - k + 1);
r = iov_send(sv[1], iov, niov, k, s);
g_assert(memcmp(iov, siov, sizeof(*iov)*niov) == 0);
if (r >= 0) {
k += r;
usleep(g_test_rand_int_range(0, 30));
} else if (errno == EAGAIN) {
select(sv[1]+1, NULL, &fds, NULL, NULL);
continue;
} else {
perror("send");
exit(1);
if (r < 0) {
if (errno == EAGAIN) {
r = 0;
} else {
perror("send");
exit(1);
}
}
k += r;
if (k < j) {
select(sv[1] + 1, NULL, &fds, NULL, NULL);
}
} while(k < j);
}