Using the mach communication primitives in X11

Authors:
Michael Ginsberg;Robert V. Baron;Brain N. Bershad
Affiliations:
School of Computer Science, Carnegie Mellon University, Pittsburgh, PA;School of Computer Science, Carnegie Mellon University, Pittsburgh, PA;School of Computer Science, Carnegie Mellon University, Pittsburgh, PA
Venue:
MSYM'93 Proceedings of the 3rd conference on USENIX MACH III Symposium - Volume 1
Year:
1993

Citing 3
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Machine-independent virtual memory management for paged uniprocessor and multiprocessor architectures

ASPLOS II Proceedings of the second international conference on Architectual support for programming languages and operating systems
The X Window System, version 11

Software—Practice & Experience - The X Window system
User-level interprocess communication for shared memory multiprocessors

ACM Transactions on Computer Systems (TOCS)

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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%.