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@inikolaev
Last active August 28, 2019 02:57
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Commands used to run profiler:

  • Event cpu

    java -agentpath:libasyncProfiler.so=start,svg,file=flamegraph-cpu.svg,interval=1ms,threads -cp target/classes ProfileIdle

  • Event wall

    java -agentpath:libasyncProfiler.so=start,svg,file=flamegraph-wall.svg,interval=1ms,event=wall,threads -cp target/classes ProfileIdle

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<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg version="1.1" width="1200" height="262" onload="init(evt)" viewBox="0 0 1200 262" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<style type="text/css">
text { font-family:Verdana; font-size:12px; fill:black; }
.func_g:hover { stroke:black; stroke-width:0.5; cursor:pointer; }
</style>
<script type="text/ecmascript">
<![CDATA[
var details, searchbtn, matchedtxt, svg;
function init(evt) {
details = document.getElementById("details").firstChild;
searchbtn = document.getElementById("search");
matchedtxt = document.getElementById("matched");
svg = document.getElementsByTagName("svg")[0];
searching = 0;
}
// mouse-over for info
function s(node) { // show
info = g_to_text(node);
details.nodeValue = "Function: " + info;
}
function c() { // clear
details.nodeValue = ' ';
}
// ctrl-F for search
window.addEventListener("keydown",function (e) {
if (e.keyCode === 114 || (e.ctrlKey && e.keyCode === 70)) {
e.preventDefault();
search_prompt();
}
})
// functions
function find_child(parent, name, attr) {
var children = parent.childNodes;
for (var i=0; i<children.length;i++) {
if (children[i].tagName == name)
return (attr != undefined) ? children[i].attributes[attr].value : children[i];
}
return;
}
function orig_save(e, attr, val) {
if (e.attributes["_orig_"+attr] != undefined) return;
if (e.attributes[attr] == undefined) return;
if (val == undefined) val = e.attributes[attr].value;
e.setAttribute("_orig_"+attr, val);
}
function orig_load(e, attr) {
if (e.attributes["_orig_"+attr] == undefined) return;
e.attributes[attr].value = e.attributes["_orig_"+attr].value;
e.removeAttribute("_orig_"+attr);
}
function g_to_text(e) {
var text = find_child(e, "title").firstChild.nodeValue;
return (text)
}
function g_to_func(e) {
var func = g_to_text(e);
// if there's any manipulation we want to do to the function
// name before it's searched, do it here before returning.
return (func);
}
function update_text(e) {
var r = find_child(e, "rect");
var t = find_child(e, "text");
var w = parseFloat(r.attributes["width"].value) -3;
var txt = find_child(e, "title").textContent.replace(/\([^(]*\)$/,"");
t.attributes["x"].value = parseFloat(r.attributes["x"].value) +3;
// Smaller than this size won't fit anything
if (w < 2*12*0.59) {
t.textContent = "";
return;
}
t.textContent = txt;
// Fit in full text width
if (/^ *$/.test(txt) || t.getSubStringLength(0, txt.length) < w)
return;
for (var x=txt.length-2; x>0; x--) {
if (t.getSubStringLength(0, x+2) <= w) {
t.textContent = txt.substring(0,x) + "..";
return;
}
}
t.textContent = "";
}
// zoom
function zoom_reset(e) {
if (e.attributes != undefined) {
orig_load(e, "x");
orig_load(e, "width");
}
if (e.childNodes == undefined) return;
for(var i=0, c=e.childNodes; i<c.length; i++) {
zoom_reset(c[i]);
}
}
function zoom_child(e, x, ratio) {
if (e.attributes != undefined) {
if (e.attributes["x"] != undefined) {
orig_save(e, "x");
e.attributes["x"].value = (parseFloat(e.attributes["x"].value) - x - 10) * ratio + 10;
if(e.tagName == "text") e.attributes["x"].value = find_child(e.parentNode, "rect", "x") + 3;
}
if (e.attributes["width"] != undefined) {
orig_save(e, "width");
e.attributes["width"].value = parseFloat(e.attributes["width"].value) * ratio;
}
}
if (e.childNodes == undefined) return;
for(var i=0, c=e.childNodes; i<c.length; i++) {
zoom_child(c[i], x-10, ratio);
}
}
function zoom_parent(e) {
if (e.attributes) {
if (e.attributes["x"] != undefined) {
orig_save(e, "x");
e.attributes["x"].value = 10;
}
if (e.attributes["width"] != undefined) {
orig_save(e, "width");
e.attributes["width"].value = parseInt(svg.width.baseVal.value) - (10*2);
}
}
if (e.childNodes == undefined) return;
for(var i=0, c=e.childNodes; i<c.length; i++) {
zoom_parent(c[i]);
}
}
function zoom(node) {
var attr = find_child(node, "rect").attributes;
var width = parseFloat(attr["width"].value);
var xmin = parseFloat(attr["x"].value);
var xmax = parseFloat(xmin + width);
var ymin = parseFloat(attr["y"].value);
var ratio = (svg.width.baseVal.value - 2*10) / width;
// XXX: Workaround for JavaScript float issues (fix me)
var fudge = 0.0001;
var unzoombtn = document.getElementById("unzoom");
unzoombtn.style["opacity"] = "1.0";
var el = document.getElementsByTagName("g");
for(var i=0;i<el.length;i++){
var e = el[i];
var a = find_child(e, "rect").attributes;
var ex = parseFloat(a["x"].value);
var ew = parseFloat(a["width"].value);
// Is it an ancestor
if (0 == 0) {
var upstack = parseFloat(a["y"].value) > ymin;
} else {
var upstack = parseFloat(a["y"].value) < ymin;
}
if (upstack) {
// Direct ancestor
if (ex <= xmin && (ex+ew+fudge) >= xmax) {
e.style["opacity"] = "0.5";
zoom_parent(e);
e.onclick = function(e){unzoom(); zoom(this);};
update_text(e);
}
// not in current path
else
e.style["display"] = "none";
}
// Children maybe
else {
// no common path
if (ex < xmin || ex + fudge >= xmax) {
e.style["display"] = "none";
}
else {
zoom_child(e, xmin, ratio);
e.onclick = function(e){zoom(this);};
update_text(e);
}
}
}
}
function unzoom() {
var unzoombtn = document.getElementById("unzoom");
unzoombtn.style["opacity"] = "0.0";
var el = document.getElementsByTagName("g");
for(i=0;i<el.length;i++) {
el[i].style["display"] = "block";
el[i].style["opacity"] = "1";
zoom_reset(el[i]);
update_text(el[i]);
}
}
// search
function reset_search() {
var el = document.getElementsByTagName("rect");
for (var i=0; i < el.length; i++) {
orig_load(el[i], "fill")
}
}
function search_prompt() {
if (!searching) {
var term = prompt("Enter a search term (regexp " +
"allowed, eg: ^ext4_)", "");
if (term != null) {
search(term)
}
} else {
reset_search();
searching = 0;
searchbtn.style["opacity"] = "0.1";
searchbtn.firstChild.nodeValue = "Search"
matchedtxt.style["opacity"] = "0.0";
matchedtxt.firstChild.nodeValue = ""
}
}
function search(term) {
var re = new RegExp(term);
var el = document.getElementsByTagName("g");
var matches = new Object();
var maxwidth = 0;
for (var i = 0; i < el.length; i++) {
var e = el[i];
if (e.attributes["class"].value != "func_g")
continue;
var func = g_to_func(e);
var rect = find_child(e, "rect");
if (rect == null) {
// the rect might be wrapped in an anchor
// if nameattr href is being used
if (rect = find_child(e, "a")) {
rect = find_child(r, "rect");
}
}
if (func == null || rect == null)
continue;
// Save max width. Only works as we have a root frame
var w = parseFloat(rect.attributes["width"].value);
if (w > maxwidth)
maxwidth = w;
if (func.match(re)) {
// highlight
var x = parseFloat(rect.attributes["x"].value);
orig_save(rect, "fill");
rect.attributes["fill"].value =
"rgb(230,0,230)";
// remember matches
if (matches[x] == undefined) {
matches[x] = w;
} else {
if (w > matches[x]) {
// overwrite with parent
matches[x] = w;
}
}
searching = 1;
}
}
if (!searching)
return;
searchbtn.style["opacity"] = "1.0";
searchbtn.firstChild.nodeValue = "Reset Search"
// calculate percent matched, excluding vertical overlap
var count = 0;
var lastx = -1;
var lastw = 0;
var keys = Array();
for (k in matches) {
if (matches.hasOwnProperty(k))
keys.push(k);
}
// sort the matched frames by their x location
// ascending, then width descending
keys.sort(function(a, b){
return a - b;
});
// Step through frames saving only the biggest bottom-up frames
// thanks to the sort order. This relies on the tree property
// where children are always smaller than their parents.
var fudge = 0.0001; // JavaScript floating point
for (var k in keys) {
var x = parseFloat(keys[k]);
var w = matches[keys[k]];
if (x >= lastx + lastw - fudge) {
count += w;
lastx = x;
lastw = w;
}
}
// display matched percent
matchedtxt.style["opacity"] = "1.0";
pct = 100 * count / maxwidth;
if (pct == 100)
pct = "100"
else
pct = pct.toFixed(1)
matchedtxt.firstChild.nodeValue = "Matched: " + pct + "%";
}
function searchover(e) {
searchbtn.style["opacity"] = "1.0";
}
function searchout(e) {
if (searching) {
searchbtn.style["opacity"] = "1.0";
} else {
searchbtn.style["opacity"] = "0.1";
}
}
]]>
</script>
<rect x="0" y="0" width="100%" height="100%" fill="rgb(240,240,220)"/>
<text x="600" y="24" text-anchor="middle" style="font-size:17px">Flame Graph</text>
<text x="10" y="245" id="details"> </text>
<text x="10" y="24" id="unzoom" onclick="unzoom()" style="opacity:0.0;cursor:pointer">Reset Zoom</text>
<text x="1090" y="24" id="search" onmouseover="searchover()" onmouseout="searchout()" onclick="search_prompt()" style="opacity:0.1;cursor:pointer">Search</text>
<text x="1090" y="245" id="matched"> </text>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>all (10,225 samples, 100.00%)</title><rect x="10.0" y="211.0" width="1180.0" height="15" fill="#c83232" rx="2" ry="2"/>
<text x="13.0" y="222.0">all</text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>[DestroyJavaVM tid=6403] (10,158 samples, 99.34%)</title><rect x="10.0" y="195.0" width="1172.3" height="15" fill="#cf3c3c" rx="2" ry="2"/>
<text x="13.0" y="206.0">[DestroyJavaVM tid=6403]</text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>ProfileIdle.main (10,138 samples, 99.15%)</title><rect x="10.7" y="179.0" width="1170.0" height="15" fill="#5ff15f" rx="2" ry="2"/>
<text x="13.7" y="190.0">ProfileIdle.main</text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>ProfileIdle.work (10,138 samples, 99.15%)</title><rect x="10.7" y="163.0" width="1170.0" height="15" fill="#4de14d" rx="2" ry="2"/>
<text x="13.7" y="174.0">ProfileIdle.work</text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>java/lang/Math.atan (9,837 samples, 96.21%)</title><rect x="26.6" y="147.0" width="1135.2" height="15" fill="#51e551" rx="2" ry="2"/>
<text x="29.6" y="158.0">java/lang/Math.atan</text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>java/lang/StrictMath.atan (9,793 samples, 95.78%)</title><rect x="31.7" y="131.0" width="1130.1" height="15" fill="#3fd43f" rx="2" ry="2"/>
<text x="34.7" y="142.0">java/lang/StrictMath.atan</text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>Java_java_lang_StrictMath_atan (63 samples, 0.62%)</title><rect x="233.0" y="115.0" width="7.2" height="15" fill="#ca3535" rx="2" ry="2"/>
<text x="236.0" y="126.0"></text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>jatan (7,923 samples, 77.49%)</title><rect x="240.2" y="115.0" width="914.4" height="15" fill="#ed6868" rx="2" ry="2"/>
<text x="243.2" y="126.0">jatan</text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>jfabs (1,792 samples, 17.53%)</title><rect x="947.8" y="99.0" width="206.8" height="15" fill="#ed6868" rx="2" ry="2"/>
<text x="950.8" y="110.0">jfabs</text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>jfabs (63 samples, 0.62%)</title><rect x="1154.6" y="115.0" width="7.2" height="15" fill="#fb7c7c" rx="2" ry="2"/>
<text x="1157.6" y="126.0"></text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>java/lang/StrictMath.atan (163 samples, 1.59%)</title><rect x="1161.8" y="147.0" width="18.9" height="15" fill="#49dd49" rx="2" ry="2"/>
<text x="1164.8" y="158.0"></text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>sun/launcher/LauncherHelper.checkAndLoadMain (10 samples, 0.10%)</title><rect x="1180.9" y="179.0" width="1.1" height="15" fill="#51e451" rx="2" ry="2"/>
<text x="1183.9" y="190.0"></text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>java/lang/ClassLoader.loadClass (10 samples, 0.10%)</title><rect x="1180.9" y="163.0" width="1.1" height="15" fill="#63f563" rx="2" ry="2"/>
<text x="1183.9" y="174.0"></text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>sun/misc/Launcher$AppClassLoader.loadClass (10 samples, 0.10%)</title><rect x="1180.9" y="147.0" width="1.1" height="15" fill="#34c934" rx="2" ry="2"/>
<text x="1183.9" y="158.0"></text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>java/lang/ClassLoader.loadClass (10 samples, 0.10%)</title><rect x="1180.9" y="131.0" width="1.1" height="15" fill="#35ca35" rx="2" ry="2"/>
<text x="1183.9" y="142.0"></text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>[tid=15875] (46 samples, 0.45%)</title><rect x="1183.4" y="195.0" width="5.3" height="15" fill="#e55c5c" rx="2" ry="2"/>
<text x="1186.4" y="206.0"></text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>thread_start (46 samples, 0.45%)</title><rect x="1183.4" y="179.0" width="5.3" height="15" fill="#ec6767" rx="2" ry="2"/>
<text x="1186.4" y="190.0"></text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>_pthread_start (46 samples, 0.45%)</title><rect x="1183.4" y="163.0" width="5.3" height="15" fill="#c83232" rx="2" ry="2"/>
<text x="1186.4" y="174.0"></text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>_pthread_body (46 samples, 0.45%)</title><rect x="1183.4" y="147.0" width="5.3" height="15" fill="#dd5050" rx="2" ry="2"/>
<text x="1186.4" y="158.0"></text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>java_start(Thread*) (46 samples, 0.45%)</title><rect x="1183.4" y="131.0" width="5.3" height="15" fill="#cb3737" rx="2" ry="2"/>
<text x="1186.4" y="142.0"></text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>WatcherThread::run() (46 samples, 0.45%)</title><rect x="1183.4" y="115.0" width="5.3" height="15" fill="#c5c53a" rx="2" ry="2"/>
<text x="1186.4" y="126.0"></text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>WatcherThread::sleep() const (44 samples, 0.43%)</title><rect x="1183.7" y="99.0" width="5.0" height="15" fill="#d4d43f" rx="2" ry="2"/>
<text x="1186.7" y="110.0"></text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>Monitor::wait(bool, long, bool) (43 samples, 0.42%)</title><rect x="1183.7" y="83.0" width="4.9" height="15" fill="#cfcf3d" rx="2" ry="2"/>
<text x="1186.7" y="94.0"></text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>Monitor::IWait(Thread*, long) (40 samples, 0.39%)</title><rect x="1183.7" y="67.0" width="4.6" height="15" fill="#e2e244" rx="2" ry="2"/>
<text x="1186.7" y="78.0"></text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>os::PlatformEvent::park(long) (37 samples, 0.36%)</title><rect x="1183.9" y="51.0" width="4.3" height="15" fill="#dddd42" rx="2" ry="2"/>
<text x="1186.9" y="62.0"></text>
</g>
<g class="func_g" onmouseover="s(this)" onmouseout="c()" onclick="zoom(this)">
<title>__psynch_cvwait (34 samples, 0.33%)</title><rect x="1184.1" y="35.0" width="3.9" height="15" fill="#e45c5c" rx="2" ry="2"/>
<text x="1187.1" y="46.0"></text>
</g>
</svg>
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public class ProfileIdle {
static void work() {
double sum = 0;
for (int i = 0; i < 200000000; i++) {
sum += Math.atan(i);
}
System.out.println(sum);
}
public static void main(String[] args) throws InterruptedException {
work();
Thread.sleep(10000);
}
}
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