{"id":363731,"date":"2024-04-23T13:30:35","date_gmt":"2024-04-23T13:30:35","guid":{"rendered":"\/forum\/forums\/topic\/chemkin-parallel-hangs-on-2024r1\/"},"modified":"2024-04-23T13:30:35","modified_gmt":"2024-04-23T13:30:35","slug":"chemkin-parallel-hangs-on-2024r1","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/chemkin-parallel-hangs-on-2024r1\/","title":{"rendered":"Chemkin Parallel hangs on 2024R1"},"content":{"rendered":"<p>Hello,<\/p>\n<p>Sorry for the lack of specific information, but I just wanted to ask about the following issue:<\/p>\n<p><strong>Issue:<\/strong> Chemkin Uncertainty analysis using multiple cores hangs on the first round of runs (107 total runs). This is in 2024R1 using eight cores.&nbsp;<\/p>\n<p><strong>Computer:<\/strong> AMD Epyc Rome, two processor workstation, 24 cores total, 64 GB RAM, Windows 10 pro.<\/p>\n<p><strong>Troubleshooting:<\/strong> The exact same analysis runs fine in 2023R2 (same case file too).<\/p>\n<p><strong>Questions:<\/strong> were there any significant changes to Chemkin 2024R1 that would causes this behavior? Did the default MPI change? Also, can I change the MPI that Chemkin uses? I find that in Fluent I have to change the default MPI to get good parallel performance with AMD processors.<\/p>\n<p>Thanks!<\/p>\n<p>-Mike<\/p>\n","protected":false},"template":"","class_list":["post-363731","topic","type-topic","status-closed","hentry","topic-tag-amd-1","topic-tag-chemkin","topic-tag-epyc-2","topic-tag-parallel"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["198499","23673"],"_bbp_author_ip":["23.52.43.10"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["411"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["363731"],"_bbp_forum_id":["27792"],"_bbp_engagement":["23673","198499"],"_bbp_voice_count":["2"],"_bbp_reply_count":["6"],"_bbp_last_reply_id":["364408"],"_bbp_last_active_id":["364408"],"_bbp_last_active_time":["2024-04-26 13:00:59"]},"test":"81822989103acf04149ecc1e8ee93667329b3f17"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/363731","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/363731\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=363731"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}