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Annotation of 43BSDTahoe/new/X/doc/Usenix/summary.t, revision 1.1

1.1     ! root        1: .SH
        !             2: Summary
        !             3: .PP
        !             4: The current 
        !             5: .UX
        !             6: kernel implementation is quite inflexible,
        !             7: closing off what might be interesting design choices.
        !             8: Lightweight processes both in the kernel and in user processes could
        !             9: be used to good advantage.
        !            10: The kernel is not properly structured to allow easy use of different
        !            11: facilities together.
        !            12: Streams may be a decent first step in this direction.
        !            13: .PP
        !            14: Stub generators, message passing and
        !            15: RPC transport protocols all
        !            16: need substantial work as 
        !            17: .UX
        !            18: moves into the distributed world.
        !            19: Using these protocols without stub generators is like a day without sunshine.
        !            20: .PP
        !            21: Resource location, authentication and naming are issues
        !            22: .UX
        !            23: has not faced in the distributed
        !            24: environment.
        !            25: Cascaded services present another level of issues which need to be faced
        !            26: in their design.
        !            27: .PP
        !            28: .UX
        !            29: has ascii terminals ingrained into its very nature.
        !            30: It will take much more work to smooth the rough edges emerging from
        !            31: the forced marriage of workstation displays with 
        !            32: .UX .
        !            33: .PP
        !            34: If a system resource is in short supply (as file descriptors are),
        !            35: the correct solution is to lift the limit entirely.
        !            36: Doubling or tripling a limit on a resource only delays the day of
        !            37: reckoning,
        !            38: while still preventing those design strategies that found them in
        !            39: short supply originally.
        !            40: .PP
        !            41: Shared memory should allow sharing of memory between processes,
        !            42: between the kernel and a process, and between a process and hardware.
        !            43: Shared libraries would open up design opportunities.
        !            44: .PP
        !            45: More work needs to be done on performance of some of the new kernel
        !            46: facilities.
        !            47: The X server uses select more heavily than any other system call,
        !            48: accounting for the largest single component of CPU time used,
        !            49: though select is not the limit in absolute performance.
        !            50: 

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