Messages in this thread | | | From | "Etienne Lorrain" <> | Date | Thu, 19 Mar 1998 15:55:08 +0001 | Subject | Idle time reported by top / 386 compiling kernel |
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Hi,
I know that I need to upgrade my system, but I now have a 386DX33 (AMD & copro) and 20 Mbytes of RAM.
I was compilling 2.1.90 yesterday, and I noticed (using top with a "nice" priority of 19) that even without swapping or accessing the disk (no disk light or noise!) I have sometime idle times of 50-70% - "cc1" and other "make" do not take most of the CPU time available.
I do not know why the processor can be idle (average ready tasks around 1.3 as displayed by top) and really few access to disk (sometine no disk light within 2 sec.)
Is that in relation with "cc1" deacreasing its priority to 20 while building the kernel ? Is that a well known problem in the sckeduler ? Is that a measurement problem (Kernel profiler Define not set) ?
If this appear on a 386, it is probably slowing down any processor (I have seen that on 2.0.33 or 2.1.*).
Another completely unrelated thing : using 2.0.33 working mostly every days since few months, I experienced recently a complete hard reset while making a compilation. No trace in any log file - nothing anywhere. Just couriousity, is that a microcontroller triple fault in memory management ?
Thanks for reading, Etienne Lorrain.
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