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Good example of livelock?
... if (spoon.owner != this) {
try { Thread.sleep(1); }
catch(InterruptedException e) { continue; }
continue;
}
// If spouse is hungry, insist upon passing the spoon.
...
How to debug Lock wait timeout exceeded on MySQL?
...ws open inside InnoDB
Main thread process no. 29956, id 1185823040, state: sleeping
Number of rows inserted 6453767, updated 4602534, deleted 3638793, read 388349505551
0.25 inserts/s, 1.25 updates/s, 0.00 deletes/s, 2.75 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============...
Google Espresso or Robotium [closed]
...mly because of timing issues. Most test authors ignore this fact, some add sleeps/retry mechanisms and even fewer implement more sophisticated thread safety code. None of these are ideal. Espresso takes care of thread safety by seamlessly synchronizing test actions and assertions with the UI of the ...
How to run functions in parallel?
... using Process.join like @aix's answer mentions.
This is better than time.sleep(10) because you can't guarantee exact timings. With explicitly waiting, you're saying that the functions must be done executing that step before moving to the next, instead of assuming it will be done within 10ms which...
Wait 5 seconds before executing next line
...s (specifically testing) this is woefully inadequate. What if you need to sleep for 500ms before returning from the function, for instance to simulate a slow async http request?
– A.Grandt
Sep 22 '16 at 9:17
...
What does flushing the buffer mean?
...de like:
for (int i = 0; i < 5; i++) {
std::cout << ".";
sleep(1); // or something similar
}
std::cout << "\n";
will output ..... at once (for exact sleep implementation, see this question). In such cases, you will want an additional << std::flush to ensure that the ...
How to multiply duration by integer?
...rent types. You need to convert the int32 to a time.Duration, such as time.Sleep(time.Duration(rand.Int31n(1000)) * time.Millisecond).
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Get exit code of a background process
...cript:
# simulate a long process that will have an identifiable exit code
(sleep 15 ; /bin/false) &
my_pid=$!
while ps | grep " $my_pid " # might also need | grep -v grep here
do
echo $my_pid is still in the ps output. Must still be running.
sleep 3
done
echo Oh, it looks like ...
How to mock an import
...ulate a side-effect that took some time. So I needed an object's method to sleep for a second. That would work like this:
sys.modules['foo'] = MagicMock()
sys.modules['foo.bar'] = MagicMock()
sys.modules['foo.baz'] = MagicMock()
# setup the side-effect:
from time import sleep
def sleep_one(*args): ...
Keyboard Interrupts with python's multiprocessing Pool
...g as my, yes unfortunately complicated, solution. It hides behind the time.sleep(10) in the main process. If you were to remove that sleep, or if you wait until the process attempts to join on the pool, which you have to do in order to guarantee the jobs are complete, then you still suffer from the ...