From: mark@taylor.uucp (Mark A. Davis) Subject: Re: X terminals: Suggestion for projects like SLS, MCC, etc. Date: Thu, 17 Jun 1993 18:02:47 GMT
evansmp@uhura.aston.ac.uk (Mark Evans) writes:
>Mark A. Davis (mark@taylor.uucp) wrote:
>:
>: That is not true. In a multi-user multi-tasking environment not everyone is
>: using the power of the host as the same split second. So when load is normal,
>: or light, each user has access to most of the power of a fast host. During
>: heavy loads the multiple CPU's kick in. During very heavy loads is the
>: only time things start to degrade some. But this is rare if the host is
>: carefully configured. (At least here it is)
>This is not necessarily a processor problem.
>Contentions for BUS, Memory, disks, etc can also cause slowdowns.
>These can put a limit of things such as shared memory multi-processor
>machines. In which case each process cannot easily get more power than
>that of an equivalent single processor machine of the same type
>anyway.
Extremely true. CPU is just part of the puzzle. Careful attention must be
paid to all I/O (here we do... like balancing disk loads over multiple drives
on multiple fast SCSI/2 channels, etc).
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