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Groups > comp.lang.forth > #132024
| From | mhx@iae.nl (mhx) |
|---|---|
| Newsgroups | comp.lang.forth |
| Subject | Parallel Forth on a 44 core machine |
| Date | 2024-08-17 15:34 +0000 |
| Organization | novaBBS |
| Message-ID | <a46cb8e455c12e2c81cd2ff60c095528@www.novabbs.com> (permalink) |
My refurbished HP Z840 (from 2016) is finally running iForth. Initially, the HP had a problem with its fan control and was unbearably loud. I fixed that by replacing a failed transistor that was being used as a temperature sensor. It's incredible how large, knowledgeable, and helpful the HP community is, and how well engineered and documented the Z series workstation are. The Z840 is prepared for Linux and Windows 10. Because it came with Windows pre-installed, I tried that first. Installing iForth was the easy part, some of the other tools (WSL2, Octave, MATLAB, VS) took quite a bit longer. Although the Z840 is equipped with modern 1TB Samsung SSDs, these are connected to the SATA interface and run at a maximum speed of only 500MB/sec (instead of the 12GB/s we are now used to). I was afraid that would become a bottleneck, but for now it will do. Below the results for the first experiments with iSPICE (a SPICE compatible circuit simulator that is written in iForth and supports explicit parallel processing). I gave it a circuit of an SMPS with 44 component variations. Depending on the number of allotted cores, iSPICE distributes the 44 jobs over the available processors and stores the results in text and graphical formats. As can be seen below, with 44 processors the tasks finish 22x faster than with a single core. The CPU temperatures stay below 62 deg C. The maximum RAM use is 64GB (this machine has 128GB). Disk I/O is clearly a problem to be worked on, for now I fake it by spacing the benchmark runs 30 seconds apart. Scaling with the number of processors appears to be linear and quite a bit better than it is on my AMD Ryzen 5800X, although well below the theoretical factor of 44x. iSPICE> .TICKER-INFO Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz TICKS-GET uses os time & PROCESSOR-CLOCK 3000MHz Do: < n TO PROCESSOR-CLOCK RECALIBRATE > ok iSPICE> BENCHTEST Starting 1 process to run 44 jobs. Master task (0) ready, waiting for the workers, performing FIX-UP ... Job `2input-boost/2input-boost.cir` finished in 52.627 seconds. waiting 30 seconds for flush to disk . . . Starting 11 processes to run 44 jobs. Master task (0) ready, waiting for the workers, performing FIX-UP ... Job `2input-boost/2input-boost.cir` finished in 6.130 seconds. waiting 30 seconds for flush to disk . . . Starting 22 processes to run 44 jobs. Master task (0) ready, waiting for the workers, performing FIX-UP ... Job `2input-boost/2input-boost.cir` finished in 3.255 seconds. waiting 30 seconds for flush to disk . . . Starting 44 processes to run 44 jobs. Master task (0) ready, waiting for the workers, performing FIX-UP ... Job `2input-boost/2input-boost.cir` finished in 2.30 seconds. waiting 30 seconds for flush to disk . . . % cpus time [s] performance ratio 1 52.921 1 11 6.521 8.115473 22 3.668 14.427753 44 2.431 21.76923 ok -marcel
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Parallel Forth on a 44 core machine mhx@iae.nl (mhx) - 2024-08-17 15:34 +0000
Re: Parallel Forth on a 44 core machine minforth@gmx.net (minforth) - 2024-08-18 09:28 +0000
Re: Parallel Forth on a 44 core machine mhx@iae.nl (mhx) - 2024-08-18 11:31 +0000
Re: Parallel Forth on a 44 core machine albert@spenarnc.xs4all.nl - 2024-08-18 14:47 +0200
Re: Parallel Forth on a 44 core machine mhx@iae.nl (mhx) - 2024-08-18 13:33 +0000
Re: Parallel Forth on a 44 core machine anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2024-08-18 13:42 +0000
Re: Parallel Forth on a 44 core machine mhx@iae.nl (mhx) - 2024-08-18 14:32 +0000
Re: Parallel Forth on a 44 core machine anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2024-08-18 15:14 +0000
Re: Parallel Forth on a 44 core machine minforth@gmx.net (minforth) - 2024-08-18 14:01 +0000
Re: Parallel Forth on a 44 core machine mhx@iae.nl (mhx) - 2024-08-28 09:29 +0000
Re: Parallel Forth on a 44 core machine Paul Rubin <no.email@nospam.invalid> - 2024-08-28 09:35 -0700
Re: Parallel Forth on a 44 core machine mhx@iae.nl (mhx) - 2024-08-18 18:37 +0000
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