TSC@vax1.esprit.southampton.ac.uk (12/10/88)
>I wonder if anybody has done research on measuring the level of >utilization of the channel, the link, and the CPUs Yes, various pieces of work have been done at Southampton University, and the Transputer Support Centre, on mesuring processor and link activity. Link and Processor activity can be estimated by using bits of hardware to monitor the links and processor activity. In software, there was a posting on this mailing list some while back of the source of a process which would estimate the utilisation of a processor. We used this for quite a while and also modified it so that it would compile under D700D with the checking on. Recently however, a process was written which would poll the links and low priority processes, to assess the activity of the processor. This provides a more complete picture of what is going on, but it does not deal with high priority processes. It also can only assess the time that a link is waiting for a transfer, not the time spent actually transferring data. The code is written in occam, but I am sure that it could be written in any language where you are allowed to access memory locations. +-----------------------------------------------------------------------------+ | Charlie Askew JANET: CHAS@UK.AC.soton.esp.v1 | | BITNET: CHAS%UK.AC.soton.esp.v1@AC.UK | | Transputer Support Centre ARPA: CHAS%UK.AC.soton.esp.v1@ucl-cs.ARPA| | Unit 2 | | Chilworth Research Centre Other: CHAS@v1.esp.soton.AC.UK | | SOUTHAMPTON | | SO1 7NP Phone: +44 703 760834/5 | | United Kingdom | +-----------------------------------------------------------------------------+