mirror of
https://github.com/retspen/webvirtcloud
synced 2026-11-08 11:16:47 +00:00
24231813d7
Each stats answer carries a signed sample of the counters, bound to the VM, its compute and UUID. The next poll sends it back and the rates are the averages since then; a sample from another run of the VM (domain ID), another host CPU count or device list, or older than 30 s falls back to one second as before. Windows are measured on the monotonic clock. Now that a poll is cheap, the Stats tab polls every 5 s like the host graph, the first time as soon as it opens (pollWhileVisible takes the delay of the first request). A counter the host reports as unsupported (-1) or that went back gives no value instead of 0 or a jump; a NIC without a target keeps its chart, a pool volume disk is measured, and a disk or NIC attached after the page loaded no longer stops the other charts. Disk rates are MB/s (they were MiB/s labelled Mb/s), network Mbit/s; the CPU tooltip names the window.
51 lines
1.7 KiB
JavaScript
51 lines
1.7 KiB
JavaScript
// Repeats request() while the page is visible and passes each answer to
|
|
// onData. request() returns a jQuery promise (e.g. $.getJSON(url)); onData is
|
|
// called after the poller's own bookkeeping, so an error in it does not stop
|
|
// the polling. One request at a time: the next one starts
|
|
// interval ms after the previous one has finished, so a slow host does not
|
|
// pile up requests, each holding a web worker. A hidden page asks nothing;
|
|
// when it is shown again it asks at once. stop() pauses, start() resumes
|
|
// at once (for example while a tab of the page is shown). The first request
|
|
// goes out after firstDelay ms, the interval if it is not given.
|
|
function pollWhileVisible(interval, request, onData, firstDelay) {
|
|
var timer = null;
|
|
var running = false;
|
|
var stopped = false;
|
|
|
|
function run() {
|
|
timer = null;
|
|
if (stopped || document.hidden) {
|
|
return;
|
|
}
|
|
running = true;
|
|
request()
|
|
.always(function () {
|
|
running = false;
|
|
if (!stopped && !document.hidden) {
|
|
timer = setTimeout(run, interval);
|
|
}
|
|
})
|
|
.done(onData);
|
|
}
|
|
|
|
function resume() {
|
|
if (!stopped && !document.hidden && !running && timer === null) {
|
|
run();
|
|
}
|
|
}
|
|
|
|
document.addEventListener("visibilitychange", resume);
|
|
timer = setTimeout(run, firstDelay === undefined ? interval : firstDelay);
|
|
|
|
return {
|
|
stop: function () {
|
|
stopped = true;
|
|
clearTimeout(timer);
|
|
timer = null;
|
|
},
|
|
start: function () {
|
|
stopped = false;
|
|
resume();
|
|
},
|
|
};
|
|
}
|