Crossgen2 determinism fix and stress mode - #87302

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davidwrighton merged 4 commits into
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davidwrighton:crossgen2_determinism2
Jun 9, 2023
Merged

Crossgen2 determinism fix and stress mode#87302
davidwrighton merged 4 commits into
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davidwrighton:crossgen2_determinism2

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Fix determinism issue found in JIT

Fixed by always zero-initializing the GenTreeVcon's gtSimdVal field

The exact issue that I debugged to find was at
https://github.com/dotnet/runtime/blob/d88f9a0ed3ac7387d4c16905ff279f4310c03667/src/coreclr/jit/importercalls.cpp#LL3538C1-L3547C18 In particular the issue is that the code constructs a vector constant, but does not zero out the entire constant.

In addition, build a stress mode to make finding this sort of issue a bit easier, and use it in the rolling outerloop determinism tests

@davidwrighton
Build determinism stress mode
e1b16b2
To use this, pass --determinism-stress:<howManyTimesToReRunTheJIT> to the compiler.
Also add use of this new mode to our crossgen2 comparison runs
@davidwrighton
Fix determinism issue found in JIT
0a1fd45
Fixed by always zero-initializing the GenTreeVcon's gtSimdVal field
The exact issue that I debugged to find was at
https://github.com/dotnet/runtime/blob/d88f9a0ed3ac7387d4c16905ff279f4310c03667/src/coreclr/jit/importercalls.cpp#LL3538C1-L3547C18 In particular the issue is that the code constructs a vector constant, but does not zero out the entire constant.
@ghostghost added the area-ReadyToRun label Jun 9, 2023
@build-analysisbuild-analysisBot mentioned this pull request Jun 9, 2023
Closed
@davidwrighton
Update crossgen2_comparison.py
edaeb52
10 was too big a number for the first runs through this.
@davidwrighton
davidwrighton merged commit 89ef7f4 into dotnet:mainJun 9, 2023
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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
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}
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})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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Crossgen2 determinism fix and stress mode - #87302
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davidwrighton merged 4 commits into
dotnet:mainfrom 
davidwrighton:crossgen2_determinism2
Jun 9, 2023
Merged
Crossgen2 determinism fix and stress mode#87302
davidwrighton merged 4 commits into
dotnet:mainfrom 
davidwrighton:crossgen2_determinism2
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Fix determinism issue found in JIT
Fixed by always zero-initializing the GenTreeVcon's gtSimdVal field
The exact issue that I debugged to find was at
https://github.com/dotnet/runtime/blob/d88f9a0ed3ac7387d4c16905ff279f4310c03667/src/coreclr/jit/importercalls.cpp#LL3538C1-L3547C18 In particular the issue is that the code constructs a vector constant, but does not zero out the entire constant.
In addition, build a stress mode to make finding this sort of issue a bit easier, and use it in the rolling outerloop determinism tests
@davidwrighton
Build determinism stress mode
e1b16b2
To use this, pass --determinism-stress:<howManyTimesToReRunTheJIT> to the compiler.
Also add use of this new mode to our crossgen2 comparison runs
@davidwrighton
Fix determinism issue found in JIT
0a1fd45
Fixed by always zero-initializing the GenTreeVcon's gtSimdVal field
The exact issue that I debugged to find was at
https://github.com/dotnet/runtime/blob/d88f9a0ed3ac7387d4c16905ff279f4310c03667/src/coreclr/jit/importercalls.cpp#LL3538C1-L3547C18 In particular the issue is that the code constructs a vector constant, but does not zero out the entire constant.
@ghostghost
added
the 
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Jun 9, 2023
@build-analysisbuild-analysisBot
mentioned this pull request
Jun 9, 2023

Closed

@davidwrighton
Update crossgen2_comparison.py
edaeb52
10 was too big a number for the first runs through this.
@davidwrighton
davidwrighton
merged commit 89ef7f4
into
dotnet:mainJun 9, 2023
@ghostghost
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Jul 9, 2023
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, 'i');
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})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Crossgen2 determinism fix and stress mode - #87302
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davidwrighton merged 4 commits into
dotnet:mainfrom 
davidwrighton:crossgen2_determinism2
Jun 9, 2023
Merged
Crossgen2 determinism fix and stress mode#87302
davidwrighton merged 4 commits into
dotnet:mainfrom 
davidwrighton:crossgen2_determinism2
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Fix determinism issue found in JIT
Fixed by always zero-initializing the GenTreeVcon's gtSimdVal field
The exact issue that I debugged to find was at
https://github.com/dotnet/runtime/blob/d88f9a0ed3ac7387d4c16905ff279f4310c03667/src/coreclr/jit/importercalls.cpp#LL3538C1-L3547C18 In particular the issue is that the code constructs a vector constant, but does not zero out the entire constant.
In addition, build a stress mode to make finding this sort of issue a bit easier, and use it in the rolling outerloop determinism tests
@davidwrighton
Build determinism stress mode
e1b16b2
To use this, pass --determinism-stress:<howManyTimesToReRunTheJIT> to the compiler.
Also add use of this new mode to our crossgen2 comparison runs
@davidwrighton
Fix determinism issue found in JIT
0a1fd45
Fixed by always zero-initializing the GenTreeVcon's gtSimdVal field
The exact issue that I debugged to find was at
https://github.com/dotnet/runtime/blob/d88f9a0ed3ac7387d4c16905ff279f4310c03667/src/coreclr/jit/importercalls.cpp#LL3538C1-L3547C18 In particular the issue is that the code constructs a vector constant, but does not zero out the entire constant.
@ghostghost
added
the 
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Jun 9, 2023
@build-analysisbuild-analysisBot
mentioned this pull request
Jun 9, 2023

Closed

@davidwrighton
Update crossgen2_comparison.py
edaeb52
10 was too big a number for the first runs through this.
@davidwrighton
davidwrighton
merged commit 89ef7f4
into
dotnet:mainJun 9, 2023
@ghostghost
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Jul 9, 2023
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, 'i');
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}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Crossgen2 determinism fix and stress mode - #87302
Merged
davidwrighton merged 4 commits into
dotnet:mainfrom 
davidwrighton:crossgen2_determinism2
Jun 9, 2023
Merged
Crossgen2 determinism fix and stress mode#87302
davidwrighton merged 4 commits into
dotnet:mainfrom 
davidwrighton:crossgen2_determinism2
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Fix determinism issue found in JIT
Fixed by always zero-initializing the GenTreeVcon's gtSimdVal field
The exact issue that I debugged to find was at
https://github.com/dotnet/runtime/blob/d88f9a0ed3ac7387d4c16905ff279f4310c03667/src/coreclr/jit/importercalls.cpp#LL3538C1-L3547C18 In particular the issue is that the code constructs a vector constant, but does not zero out the entire constant.
In addition, build a stress mode to make finding this sort of issue a bit easier, and use it in the rolling outerloop determinism tests
@davidwrighton
Build determinism stress mode
e1b16b2
To use this, pass --determinism-stress:<howManyTimesToReRunTheJIT> to the compiler.
Also add use of this new mode to our crossgen2 comparison runs
@davidwrighton
Fix determinism issue found in JIT
0a1fd45
Fixed by always zero-initializing the GenTreeVcon's gtSimdVal field
The exact issue that I debugged to find was at
https://github.com/dotnet/runtime/blob/d88f9a0ed3ac7387d4c16905ff279f4310c03667/src/coreclr/jit/importercalls.cpp#LL3538C1-L3547C18 In particular the issue is that the code constructs a vector constant, but does not zero out the entire constant.
@ghostghost
added
the 
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Jun 9, 2023
@build-analysisbuild-analysisBot
mentioned this pull request
Jun 9, 2023

Closed

@davidwrighton
Update crossgen2_comparison.py
edaeb52
10 was too big a number for the first runs through this.
@davidwrighton
davidwrighton
merged commit 89ef7f4
into
dotnet:mainJun 9, 2023
@ghostghost
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Jul 9, 2023
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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Crossgen2 determinism fix and stress mode - #87302
Merged
davidwrighton merged 4 commits into
dotnet:mainfrom 
davidwrighton:crossgen2_determinism2
Jun 9, 2023
Merged
Crossgen2 determinism fix and stress mode#87302
davidwrighton merged 4 commits into
dotnet:mainfrom 
davidwrighton:crossgen2_determinism2
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Fix determinism issue found in JIT
Fixed by always zero-initializing the GenTreeVcon's gtSimdVal field
The exact issue that I debugged to find was at
https://github.com/dotnet/runtime/blob/d88f9a0ed3ac7387d4c16905ff279f4310c03667/src/coreclr/jit/importercalls.cpp#LL3538C1-L3547C18 In particular the issue is that the code constructs a vector constant, but does not zero out the entire constant.
In addition, build a stress mode to make finding this sort of issue a bit easier, and use it in the rolling outerloop determinism tests
@davidwrighton
Build determinism stress mode
e1b16b2
To use this, pass --determinism-stress:<howManyTimesToReRunTheJIT> to the compiler.
Also add use of this new mode to our crossgen2 comparison runs
@davidwrighton
Fix determinism issue found in JIT
0a1fd45
Fixed by always zero-initializing the GenTreeVcon's gtSimdVal field
The exact issue that I debugged to find was at
https://github.com/dotnet/runtime/blob/d88f9a0ed3ac7387d4c16905ff279f4310c03667/src/coreclr/jit/importercalls.cpp#LL3538C1-L3547C18 In particular the issue is that the code constructs a vector constant, but does not zero out the entire constant.
@ghostghost
added
the 
area-ReadyToRun

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Jun 9, 2023
@build-analysisbuild-analysisBot
mentioned this pull request
Jun 9, 2023

Closed

@davidwrighton
Update crossgen2_comparison.py
edaeb52
10 was too big a number for the first runs through this.
@davidwrighton
davidwrighton
merged commit 89ef7f4
into
dotnet:mainJun 9, 2023
@ghostghost
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Jul 9, 2023
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Crossgen2 determinism fix and stress mode - #87302
Merged
davidwrighton merged 4 commits into
dotnet:mainfrom 
davidwrighton:crossgen2_determinism2
Jun 9, 2023
Merged
Crossgen2 determinism fix and stress mode#87302
davidwrighton merged 4 commits into
dotnet:mainfrom 
davidwrighton:crossgen2_determinism2
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Fix determinism issue found in JIT
Fixed by always zero-initializing the GenTreeVcon's gtSimdVal field
The exact issue that I debugged to find was at
https://github.com/dotnet/runtime/blob/d88f9a0ed3ac7387d4c16905ff279f4310c03667/src/coreclr/jit/importercalls.cpp#LL3538C1-L3547C18 In particular the issue is that the code constructs a vector constant, but does not zero out the entire constant.
In addition, build a stress mode to make finding this sort of issue a bit easier, and use it in the rolling outerloop determinism tests
@davidwrighton
Build determinism stress mode
e1b16b2
To use this, pass --determinism-stress:<howManyTimesToReRunTheJIT> to the compiler.
Also add use of this new mode to our crossgen2 comparison runs
@davidwrighton
Fix determinism issue found in JIT
0a1fd45
Fixed by always zero-initializing the GenTreeVcon's gtSimdVal field
The exact issue that I debugged to find was at
https://github.com/dotnet/runtime/blob/d88f9a0ed3ac7387d4c16905ff279f4310c03667/src/coreclr/jit/importercalls.cpp#LL3538C1-L3547C18 In particular the issue is that the code constructs a vector constant, but does not zero out the entire constant.
@ghostghost
added
the 
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Jun 9, 2023
@build-analysisbuild-analysisBot
mentioned this pull request
Jun 9, 2023

Closed

@davidwrighton
Update crossgen2_comparison.py
edaeb52
10 was too big a number for the first runs through this.
@davidwrighton
davidwrighton
merged commit 89ef7f4
into
dotnet:mainJun 9, 2023
@ghostghost
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Jul 9, 2023
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Crossgen2 determinism fix and stress mode - #87302
Merged
davidwrighton merged 4 commits into
dotnet:mainfrom 
davidwrighton:crossgen2_determinism2
Jun 9, 2023
Merged
Crossgen2 determinism fix and stress mode#87302
davidwrighton merged 4 commits into
dotnet:mainfrom 
davidwrighton:crossgen2_determinism2
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Fix determinism issue found in JIT
Fixed by always zero-initializing the GenTreeVcon's gtSimdVal field
The exact issue that I debugged to find was at
https://github.com/dotnet/runtime/blob/d88f9a0ed3ac7387d4c16905ff279f4310c03667/src/coreclr/jit/importercalls.cpp#LL3538C1-L3547C18 In particular the issue is that the code constructs a vector constant, but does not zero out the entire constant.
In addition, build a stress mode to make finding this sort of issue a bit easier, and use it in the rolling outerloop determinism tests
@davidwrighton
Build determinism stress mode
e1b16b2
To use this, pass --determinism-stress:<howManyTimesToReRunTheJIT> to the compiler.
Also add use of this new mode to our crossgen2 comparison runs
@davidwrighton
Fix determinism issue found in JIT
0a1fd45
Fixed by always zero-initializing the GenTreeVcon's gtSimdVal field
The exact issue that I debugged to find was at
https://github.com/dotnet/runtime/blob/d88f9a0ed3ac7387d4c16905ff279f4310c03667/src/coreclr/jit/importercalls.cpp#LL3538C1-L3547C18 In particular the issue is that the code constructs a vector constant, but does not zero out the entire constant.
@ghostghost
added
the 
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Update crossgen2_comparison.py
edaeb52
10 was too big a number for the first runs through this.
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Crossgen2 determinism fix and stress mode - #87302
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davidwrighton merged 4 commits into
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davidwrighton:crossgen2_determinism2
Jun 9, 2023
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Crossgen2 determinism fix and stress mode#87302
davidwrighton merged 4 commits into
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davidwrighton:crossgen2_determinism2
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Fix determinism issue found in JIT
Fixed by always zero-initializing the GenTreeVcon's gtSimdVal field
The exact issue that I debugged to find was at
https://github.com/dotnet/runtime/blob/d88f9a0ed3ac7387d4c16905ff279f4310c03667/src/coreclr/jit/importercalls.cpp#LL3538C1-L3547C18 In particular the issue is that the code constructs a vector constant, but does not zero out the entire constant.
In addition, build a stress mode to make finding this sort of issue a bit easier, and use it in the rolling outerloop determinism tests
@davidwrighton
Build determinism stress mode
e1b16b2
To use this, pass --determinism-stress:<howManyTimesToReRunTheJIT> to the compiler.
Also add use of this new mode to our crossgen2 comparison runs
@davidwrighton
Fix determinism issue found in JIT
0a1fd45
Fixed by always zero-initializing the GenTreeVcon's gtSimdVal field
The exact issue that I debugged to find was at
https://github.com/dotnet/runtime/blob/d88f9a0ed3ac7387d4c16905ff279f4310c03667/src/coreclr/jit/importercalls.cpp#LL3538C1-L3547C18 In particular the issue is that the code constructs a vector constant, but does not zero out the entire constant.
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@davidwrighton
Update crossgen2_comparison.py
edaeb52
10 was too big a number for the first runs through this.
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merged commit 89ef7f4
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dotnet:mainJun 9, 2023
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