{"id":"https://openalex.org/W4414210424","doi":"https://doi.org/10.1145/3731545.3735121","title":"Flux Emulator: First Insights into Optimizing Scheduling for Exascale HPC","display_name":"Flux Emulator: First Insights into Optimizing Scheduling for Exascale HPC","publication_year":2025,"publication_date":"2025-07-20","ids":{"openalex":"https://openalex.org/W4414210424","doi":"https://doi.org/10.1145/3731545.3735121"},"language":"en","primary_location":{"id":"doi:10.1145/3731545.3735121","is_oa":false,"landing_page_url":"https://doi.org/10.1145/3731545.3735121","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 34th International Symposium on High-Performance Parallel and Distributed Computing","raw_type":"proceedings-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5114849093","display_name":"W. Jay Ashworth","orcid":"https://orcid.org/0009-0006-8395-3529"},"institutions":[{"id":"https://openalex.org/I2802706902","display_name":"Knoxville College","ror":"https://ror.org/02bxrp522","country_code":"US","type":"education","lineage":["https://openalex.org/I2802706902"]},{"id":"https://openalex.org/I75027704","display_name":"University of Tennessee at Knoxville","ror":"https://ror.org/020f3ap87","country_code":"US","type":"education","lineage":["https://openalex.org/I75027704"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"W. Jay Ashworth","raw_affiliation_strings":["University of Tennessee Knoxville, Knoxville, USA"],"raw_orcid":"https://orcid.org/0009-0006-8395-3529","affiliations":[{"raw_affiliation_string":"University of Tennessee Knoxville, Knoxville, USA","institution_ids":["https://openalex.org/I2802706902","https://openalex.org/I75027704"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5088217764","display_name":"Ian Lumsden","orcid":"https://orcid.org/0000-0003-0009-5487"},"institutions":[{"id":"https://openalex.org/I2802706902","display_name":"Knoxville College","ror":"https://ror.org/02bxrp522","country_code":"US","type":"education","lineage":["https://openalex.org/I2802706902"]},{"id":"https://openalex.org/I75027704","display_name":"University of Tennessee at Knoxville","ror":"https://ror.org/020f3ap87","country_code":"US","type":"education","lineage":["https://openalex.org/I75027704"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Ian Lumsden","raw_affiliation_strings":["University of Tennessee, Knoxville, Knoxville, USA"],"raw_orcid":"https://orcid.org/0000-0003-0009-5487","affiliations":[{"raw_affiliation_string":"University of Tennessee, Knoxville, Knoxville, USA","institution_ids":["https://openalex.org/I2802706902","https://openalex.org/I75027704"]}]},{"author_position":"middle","author":{"id":null,"display_name":"Jim Garlick","orcid":"https://orcid.org/0009-0005-2938-9536"},"institutions":[{"id":"https://openalex.org/I1282311441","display_name":"Lawrence Livermore National Laboratory","ror":"https://ror.org/041nk4h53","country_code":"US","type":"facility","lineage":["https://openalex.org/I1282311441","https://openalex.org/I1330989302","https://openalex.org/I198811213","https://openalex.org/I4210138311"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Jim Garlick","raw_affiliation_strings":["Lawrence Livermore National Laboratory, Livermore, USA"],"raw_orcid":"https://orcid.org/0009-0005-2938-9536","affiliations":[{"raw_affiliation_string":"Lawrence Livermore National Laboratory, Livermore, USA","institution_ids":["https://openalex.org/I1282311441"]}]},{"author_position":"middle","author":{"id":null,"display_name":"Mark Grondona","orcid":"https://orcid.org/0009-0003-2334-8675"},"institutions":[{"id":"https://openalex.org/I1282311441","display_name":"Lawrence Livermore National Laboratory","ror":"https://ror.org/041nk4h53","country_code":"US","type":"facility","lineage":["https://openalex.org/I1282311441","https://openalex.org/I1330989302","https://openalex.org/I198811213","https://openalex.org/I4210138311"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Mark Grondona","raw_affiliation_strings":["Lawrence Livermore National Laboratory, Livermore, USA"],"raw_orcid":"https://orcid.org/0009-0003-2334-8675","affiliations":[{"raw_affiliation_string":"Lawrence Livermore National Laboratory, Livermore, USA","institution_ids":["https://openalex.org/I1282311441"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5012779678","display_name":"Olga Pearce","orcid":"https://orcid.org/0000-0002-1904-9627"},"institutions":[{"id":"https://openalex.org/I1282311441","display_name":"Lawrence Livermore National Laboratory","ror":"https://ror.org/041nk4h53","country_code":"US","type":"facility","lineage":["https://openalex.org/I1282311441","https://openalex.org/I1330989302","https://openalex.org/I198811213","https://openalex.org/I4210138311"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Olga Pearce","raw_affiliation_strings":["Lawrence Livermore National Laboratory, Livermore, USA"],"raw_orcid":"https://orcid.org/0000-0002-1904-9627","affiliations":[{"raw_affiliation_string":"Lawrence Livermore National Laboratory, Livermore, USA","institution_ids":["https://openalex.org/I1282311441"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5010860138","display_name":"Stephanie Brink","orcid":"https://orcid.org/0000-0002-1458-8453"},"institutions":[{"id":"https://openalex.org/I1282311441","display_name":"Lawrence Livermore National Laboratory","ror":"https://ror.org/041nk4h53","country_code":"US","type":"facility","lineage":["https://openalex.org/I1282311441","https://openalex.org/I1330989302","https://openalex.org/I198811213","https://openalex.org/I4210138311"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Stephanie Brink","raw_affiliation_strings":["Lawrence Livermore National Laboratory, Livermore, USA"],"raw_orcid":"https://orcid.org/0000-0002-1458-8453","affiliations":[{"raw_affiliation_string":"Lawrence Livermore National Laboratory, Livermore, USA","institution_ids":["https://openalex.org/I1282311441"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5009000154","display_name":"Dewi Yokelson","orcid":"https://orcid.org/0000-0003-1453-5906"},"institutions":[{"id":"https://openalex.org/I1282311441","display_name":"Lawrence Livermore National Laboratory","ror":"https://ror.org/041nk4h53","country_code":"US","type":"facility","lineage":["https://openalex.org/I1282311441","https://openalex.org/I1330989302","https://openalex.org/I198811213","https://openalex.org/I4210138311"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Dewi Yokelson","raw_affiliation_strings":["Lawrence Livermore National Laboratory, Livermore, USA"],"raw_orcid":"https://orcid.org/0000-0003-1453-5906","affiliations":[{"raw_affiliation_string":"Lawrence Livermore National Laboratory, Livermore, USA","institution_ids":["https://openalex.org/I1282311441"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5039245401","display_name":"Daniel Milroy","orcid":"https://orcid.org/0000-0001-6500-3227"},"institutions":[{"id":"https://openalex.org/I1282311441","display_name":"Lawrence Livermore National Laboratory","ror":"https://ror.org/041nk4h53","country_code":"US","type":"facility","lineage":["https://openalex.org/I1282311441","https://openalex.org/I1330989302","https://openalex.org/I198811213","https://openalex.org/I4210138311"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Daniel Milroy","raw_affiliation_strings":["Lawrence Livermore National Laboratory, Livermore, USA"],"raw_orcid":"https://orcid.org/0000-0001-6500-3227","affiliations":[{"raw_affiliation_string":"Lawrence Livermore National Laboratory, Livermore, USA","institution_ids":["https://openalex.org/I1282311441"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5082396646","display_name":"Tapasya Patki","orcid":"https://orcid.org/0000-0003-2543-9688"},"institutions":[{"id":"https://openalex.org/I1282311441","display_name":"Lawrence Livermore National Laboratory","ror":"https://ror.org/041nk4h53","country_code":"US","type":"facility","lineage":["https://openalex.org/I1282311441","https://openalex.org/I1330989302","https://openalex.org/I198811213","https://openalex.org/I4210138311"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Tapasya Patki","raw_affiliation_strings":["Lawrence Livermore National Laboratory, Livermore, USA"],"raw_orcid":"https://orcid.org/0000-0003-2543-9688","affiliations":[{"raw_affiliation_string":"Lawrence Livermore National Laboratory, Livermore, USA","institution_ids":["https://openalex.org/I1282311441"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5083906258","display_name":"Tom Scogland","orcid":"https://orcid.org/0000-0001-7234-5743"},"institutions":[{"id":"https://openalex.org/I1282311441","display_name":"Lawrence Livermore National Laboratory","ror":"https://ror.org/041nk4h53","country_code":"US","type":"facility","lineage":["https://openalex.org/I1282311441","https://openalex.org/I1330989302","https://openalex.org/I198811213","https://openalex.org/I4210138311"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Thomas Scogland","raw_affiliation_strings":["Lawrence Livermore National Laboratory, Livermore, USA"],"raw_orcid":"https://orcid.org/0000-0001-7234-5743","affiliations":[{"raw_affiliation_string":"Lawrence Livermore National Laboratory, Livermore, USA","institution_ids":["https://openalex.org/I1282311441"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5078387820","display_name":"Michela Taufer","orcid":"https://orcid.org/0000-0002-0031-6377"},"institutions":[{"id":"https://openalex.org/I2802706902","display_name":"Knoxville College","ror":"https://ror.org/02bxrp522","country_code":"US","type":"education","lineage":["https://openalex.org/I2802706902"]},{"id":"https://openalex.org/I75027704","display_name":"University of Tennessee at Knoxville","ror":"https://ror.org/020f3ap87","country_code":"US","type":"education","lineage":["https://openalex.org/I75027704"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Michela Taufer","raw_affiliation_strings":["University of Tennessee, Knoxville, Knoxville, USA"],"raw_orcid":"https://orcid.org/0000-0002-0031-6377","affiliations":[{"raw_affiliation_string":"University of Tennessee, Knoxville, Knoxville, USA","institution_ids":["https://openalex.org/I2802706902","https://openalex.org/I75027704"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":11,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.24857553,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"1","last_page":"2"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10715","display_name":"Distributed and Parallel Computing Systems","score":0.9998000264167786,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10715","display_name":"Distributed and Parallel Computing Systems","score":0.9998000264167786,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11181","display_name":"Advanced Data Storage Technologies","score":0.9990000128746033,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10054","display_name":"Parallel Computing and Optimization Techniques","score":0.9988999962806702,"subfield":{"id":"https://openalex.org/subfields/1708","display_name":"Hardware and Architecture"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/scheduling","display_name":"Scheduling (production processes)","score":0.7039999961853027},{"id":"https://openalex.org/keywords/job-scheduler","display_name":"Job scheduler","score":0.5921000242233276},{"id":"https://openalex.org/keywords/supercomputer","display_name":"Supercomputer","score":0.5785999894142151},{"id":"https://openalex.org/keywords/overhead","display_name":"Overhead (engineering)","score":0.43389999866485596},{"id":"https://openalex.org/keywords/dynamic-priority-scheduling","display_name":"Dynamic priority scheduling","score":0.366100013256073},{"id":"https://openalex.org/keywords/processor-scheduling","display_name":"Processor scheduling","score":0.3580999970436096},{"id":"https://openalex.org/keywords/exascale-computing","display_name":"Exascale computing","score":0.30820000171661377}],"concepts":[{"id":"https://openalex.org/C206729178","wikidata":"https://www.wikidata.org/wiki/Q2271896","display_name":"Scheduling (production processes)","level":2,"score":0.7039999961853027},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7013999819755554},{"id":"https://openalex.org/C111873713","wikidata":"https://www.wikidata.org/wiki/Q1641413","display_name":"Job scheduler","level":3,"score":0.5921000242233276},{"id":"https://openalex.org/C83283714","wikidata":"https://www.wikidata.org/wiki/Q121117","display_name":"Supercomputer","level":2,"score":0.5785999894142151},{"id":"https://openalex.org/C120314980","wikidata":"https://www.wikidata.org/wiki/Q180634","display_name":"Distributed computing","level":1,"score":0.48559999465942383},{"id":"https://openalex.org/C2779960059","wikidata":"https://www.wikidata.org/wiki/Q7113681","display_name":"Overhead (engineering)","level":2,"score":0.43389999866485596},{"id":"https://openalex.org/C107568181","wikidata":"https://www.wikidata.org/wiki/Q5319000","display_name":"Dynamic priority scheduling","level":3,"score":0.366100013256073},{"id":"https://openalex.org/C2984822820","wikidata":"https://www.wikidata.org/wiki/Q1123036","display_name":"Processor scheduling","level":3,"score":0.3580999970436096},{"id":"https://openalex.org/C2778837361","wikidata":"https://www.wikidata.org/wiki/Q2450880","display_name":"Exascale computing","level":3,"score":0.30820000171661377},{"id":"https://openalex.org/C2780609101","wikidata":"https://www.wikidata.org/wiki/Q17156588","display_name":"Resource management (computing)","level":2,"score":0.298799991607666},{"id":"https://openalex.org/C206345919","wikidata":"https://www.wikidata.org/wiki/Q20380951","display_name":"Resource (disambiguation)","level":2,"score":0.28610000014305115},{"id":"https://openalex.org/C122141398","wikidata":"https://www.wikidata.org/wiki/Q5456330","display_name":"Fixed-priority pre-emptive scheduling","level":5,"score":0.28299999237060547},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.2824000120162964},{"id":"https://openalex.org/C149635348","wikidata":"https://www.wikidata.org/wiki/Q193040","display_name":"Embedded system","level":1,"score":0.28220000863075256},{"id":"https://openalex.org/C55416958","wikidata":"https://www.wikidata.org/wiki/Q6206757","display_name":"Job shop scheduling","level":3,"score":0.26669999957084656},{"id":"https://openalex.org/C18762648","wikidata":"https://www.wikidata.org/wiki/Q42213","display_name":"Work (physics)","level":2,"score":0.2624000012874603},{"id":"https://openalex.org/C2989134064","wikidata":"https://www.wikidata.org/wiki/Q288510","display_name":"Execution time","level":2,"score":0.25429999828338623},{"id":"https://openalex.org/C2778915421","wikidata":"https://www.wikidata.org/wiki/Q3643177","display_name":"Performance improvement","level":2,"score":0.25119999051094055}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1145/3731545.3735121","is_oa":false,"landing_page_url":"https://doi.org/10.1145/3731545.3735121","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 34th International Symposium on High-Performance Parallel and Distributed Computing","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[{"id":"https://openalex.org/G1884459643","display_name":null,"funder_award_id":"LLNL-ABS-2003483","funder_id":"https://openalex.org/F4320338286","funder_display_name":"Lawrence Livermore National Laboratory"},{"id":"https://openalex.org/G2919610627","display_name":null,"funder_award_id":"2331152","funder_id":"https://openalex.org/F4320306076","funder_display_name":"National Science Foundation"},{"id":"https://openalex.org/G4167750608","display_name":null,"funder_award_id":"2138811","funder_id":"https://openalex.org/F4320306076","funder_display_name":"National Science Foundation"},{"id":"https://openalex.org/G5816449448","display_name":null,"funder_award_id":"DE-AC52-07NA27344","funder_id":"https://openalex.org/F4320306084","funder_display_name":"U.S. Department of Energy"}],"funders":[{"id":"https://openalex.org/F4320306076","display_name":"National Science Foundation","ror":"https://ror.org/021nxhr62"},{"id":"https://openalex.org/F4320306084","display_name":"U.S. Department of Energy","ror":"https://ror.org/01bj3aw27"},{"id":"https://openalex.org/F4320338286","display_name":"Lawrence Livermore National Laboratory","ror":"https://ror.org/041nk4h53"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":2,"referenced_works":["https://openalex.org/W1545469897","https://openalex.org/W4388581131"],"related_works":[],"abstract_inverted_index":{"El":[0],"Capitan,":[1],"currently":[2],"the":[3,51,71,90,100,118],"world's":[4],"largest":[5],"supercomputer":[6],"at":[7],"1.742":[8],"Ex-aflop/s,":[9],"introduces":[10,50],"challenges":[11],"in":[12,61,106,114],"scheduling":[13,59],"due":[14],"to":[15,57,78],"its":[16,44,104],"scale":[17],"and":[18,31,76,85,102],"innovative":[19],"rabbit":[20],"nodes,":[21],"which":[22],"traditional":[23],"schedulers":[24],"cannot":[25],"efficiently":[26],"handle.":[27],"Flux,":[28],"a":[29,54,115,122],"resource":[30,37,83],"job":[32,80,91],"management":[33],"system,":[34],"handles":[35],"dynamic":[36],"allocation":[38],"tailored":[39],"for":[40],"exascale":[41],"systems":[42],"through":[43],"graph-based":[45],"scheduler,":[46],"Fluxion.":[47],"This":[48],"work":[49],"Flux":[52,75],"Emulator,":[53],"tool":[55],"designed":[56],"test":[58],"policies":[60],"Fluxion":[62,77],"without":[63],"impacting":[64],"production":[65],"systems.":[66],"The":[67],"emulator":[68,101],"plugs":[69],"into":[70],"real":[72,123],"components":[73],"of":[74,117],"mimic":[79],"execution,":[81],"emulate":[82],"usage,":[84],"collect":[86],"information":[87],"on":[88],"how":[89],"behaves.":[92],"Preliminary":[93],"tests":[94],"show":[95],"negligible":[96],"overhead":[97],"introduced":[98],"by":[99],"demonstrate":[103],"effectiveness":[105],"evaluating":[107],"scheduli":[108],"ng":[109],"policies,":[110],"like":[111],"conservative":[112],"backfilling,":[113],"fraction":[116],"time":[119],"required":[120],"with":[121],"system.":[124]},"counts_by_year":[],"updated_date":"2026-06-21T07:57:09.225873","created_date":"2025-10-10T00:00:00"}
