Hi Stefan and ZGC team, I see crashes as well with early access build. The command line is "java -XX:+UseZGC -Xmx8g -Xms8g -Xlog:gc* -XX:ParallelGCThreads=8 -XX:ConcGCThreads=2 -jar specjbb2015.jar -m COMPOSITE". It works well in Intel sky-lake machines but consistently crashes in an Ice-lake architecture "Intel(R) Xeon(R) Platinum 8369B CPU @ 2.90GHz" machine in 3 minutes. Hope this can help. Thanks, Liang ------------------------------------------------------------------ From:Stefan Karlsson <stefan.karlsson@oracle.com> Send Time:2022 Oct. 19 (Wed.) 19:44 To:"Kemper, William" <kemperw@amazon.com>; zgc-dev@openjdk.org <zgc-dev@openjdk.org> Subject:Re: Generational ZGC crashes on specbjbb Thanks a lot! I'll see if I can figure out a way to reproduce this in-house. StefanK On 2022-10-18 23:39, Kemper, William wrote: Filed: https://bugs.openjdk.org/browse/JDK-8295532 <https://bugs.openjdk.org/browse/JDK-8295532 > - Please let me know if you need anymore data. We're excited about Generational ZGC! William From: Stefan Karlsson <stefan.karlsson@oracle.com> <mailto:stefan.karlsson@oracle.com > Sent: Tuesday, October 18, 2022 11:57:47 AM To: Kemper, William; zgc-dev@openjdk.org <mailto:zgc-dev@openjdk.org > Subject: RE: [EXTERNAL]Generational ZGC crashes on specbjbb CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you can confirm the sender and know the content is safe. Thanks for reporting. If you file a JBS entry I'll figure out the best way to tag issues around Generational ZGC. Thanks, StefanK On 2022-10-18 20:20, Kemper, William wrote: How do you want to handle error reports? I didn't see how to open an issue on GitHub. Should I open a ticket on JBS? Is there a label to distinguish ZGC generational from non-generational? Thank you, William