{"title":"Using the Mach Communication Primitives in X11","authors":"Michael Ginsberg, R. Baron, B. Bershad","doi":"10.21236/ada264049","DOIUrl":"https://doi.org/10.21236/ada264049","url":null,"abstract":"We have modified the X11 windowing system to use the native communication facilities of the ach 3.0 microkernel. Our new implementation can rely on ach's low-overhead IPC facility as a direct replacement for sockets, or it can use shared memory as a transport between X11 clients and the server. On conventional BSD Unix systems. X11 communication is done through sockets. Because a user-level process implements Unix functionality on top of ach 3.0, a socket-based version of X11 performs substantially worse than when running on a monolithic Unix kernel. Using ach IPC as the transport between X11 clients and the server. X11 performance is slightly better than that of a monolithic system in which sockets are implemented inside the kernel as opposed to within a user level process. Using ach's shared memory facilities as the transport, we have measured performance improvements of over 40%.","PeriodicalId":301916,"journal":{"name":"USENIX MACH Symposium","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132401841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}