<div dir="ltr"><div><p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">Hello,</p><p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><br>
I have some generic  questions about virtual threads after reading the <a href="https://openjdk.org/jeps/444"> JEP 444</a>, <a href="https://openjdk.org/jeps/491">JEP 491</a><span style="text-decoration:underline"> .</span> I did  not find those answers by googling or in some Devoxx/JVMLS talks that I have watched. That’s why I am reaching out here. Please redirect me if it’s not the appropriate place.</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal;min-height:15px"><br></p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">What is the reason behind making a virtual thread daemon thread?  </p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">Does it mean we should use virtual thread only if we do not care about its completion  before shutdown of JVM?</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal;min-height:15px"><br></p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">IN JEP 444, I could see `The scheduler does not compensate for pinning by expanding its parallelism.` Is it based on the assumption that other tasks may wait for the same lock or is it  because of some other technical reasons around pinning?</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal;min-height:15px"><br></p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">In <a href="https://openjdk.org/jeps/491">JEP 491</a>, I could see the in-depth detail of the reason behind pinning for synchronized cases. Could someone share what would be the reason behind pinning in case of the JNI method invocation? I could see the JEP mentions `presence of native frame on stack` . Therefore, I am guessing it’s something around that but if someone could give a bit more detail about it that would  be helpful.</p></div><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div>Thanks and Regards,<br>Nadeesh TV<br></div><br></div><br></div></div></div>