Re: Performance degradation over time on VAX...

[Ken Wellsch <kcwellsch%outlook.com@localhost>]

... I also wanted to try testing on some real hardware.

In this case, a vaxstation 4000/60 and a zuluscsi card.

The simH testing I did was MSCP disk path, while this hardware is SCSI based.

The 6.x releases and to a lesser extent, the 5.x releases, I had to give
up booting them.  The boot loader was just too slow to load. (I left one
of the 6.x run while I got lunch - it was still loading on my return)

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dd if=/dev/rsd0c of=/dev/null bs=1024 count=30000

-----------------------------------------------------

2.0.0.txt:30720000 bytes transferred in  88.543 secs (346950 bytes/sec)
2.0.2.txt:30720000 bytes transferred in  87.060 secs (352860 bytes/sec)
2.1.0.txt:30720000 bytes transferred in  86.328 secs (355852 bytes/sec)
3.1.1.txt:30720000 bytes transferred in  91.861 secs (334418 bytes/sec)
4.0.0.txt:30720000 bytes transferred in 101.231 secs (303464 bytes/sec)
4.0.1.txt:30720000 bytes transferred in  97.718 secs (314374 bytes/sec)
5.0.0.txt:30720000 bytes transferred in 123.021 secs (249713 bytes/sec)
5.0.2.txt:30720000 bytes transferred in 123.868 secs (248005 bytes/sec)
5.2.3.txt:30720000 bytes transferred in 108.190 secs (283944 bytes/sec)
7.0.0.txt:30720000 bytes transferred in 115.664 secs (265596 bytes/sec)
7.1.2.txt:30720000 bytes transferred in 120.925 secs (254041 bytes/sec)
7.2.0.txt:30720000 bytes transferred in 122.215 secs (251360 bytes/sec)
8.0.0.txt:30720000 bytes transferred in 130.340 secs (235691 bytes/sec)
8.1.0.txt:30720000 bytes transferred in 127.649 secs (240659 bytes/sec)
8.2.0.txt:30720000 bytes transferred in 132.457 secs (231924 bytes/sec)
9.0.0.txt:30720000 bytes transferred in 131.649 secs (233347 bytes/sec)
9.1.0.txt:30720000 bytes transferred in 128.421 secs (239213 bytes/sec)
9.2.0.txt:30720000 bytes transferred in 127.992 secs (240015 bytes/sec)
10.0..txt:30720000 bytes transferred in 152.665 secs (201224 bytes/sec)
10.1..txt:30720000 bytes transferred in 151.804 secs (202366 bytes/sec)
11rc5.txt:30720000 bytes transferred in 152.562 secs (201360 bytes/sec)

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I was curious about the disk handling part of the process too, so I
also ran this to make the timing focus mostly on disk speed itself.

dd if=/dev/rsd0c of=/dev/null bs=1m count=200

-----------------------------------------------------

2.0.0.txt:209715200 bytes transferred in  83.763 secs (2503673 bytes/sec)
2.0.2.txt:209715200 bytes transferred in  83.571 secs (2509425 bytes/sec)
2.1.0.txt:209715200 bytes transferred in  83.510 secs (2511258 bytes/sec)
3.1.1.txt:209715200 bytes transferred in  83.510 secs (2511258 bytes/sec)
4.0.0.txt:209715200 bytes transferred in 100.025 secs (2096627 bytes/sec)
4.0.1.txt:209715200 bytes transferred in  77.242 secs (2715041 bytes/sec)
5.0.0.txt:209715200 bytes transferred in  75.902 secs (2762973 bytes/sec)
5.0.2.txt:209715200 bytes transferred in  76.592 secs (2738082 bytes/sec)
5.2.3.txt:209715200 bytes transferred in  74.408 secs (2818449 bytes/sec)
7.0.0.txt:209715200 bytes transferred in  74.437 secs (2817351 bytes/sec)
7.1.2.txt:209715200 bytes transferred in  74.843 secs (2802068 bytes/sec)
7.2.0.txt:209715200 bytes transferred in  74.844 secs (2802030 bytes/sec)
8.0.0.txt:209715200 bytes transferred in  74.992 secs (2796500 bytes/sec)
8.1.0.txt:209715200 bytes transferred in  75.797 secs (2766800 bytes/sec)
8.2.0.txt:209715200 bytes transferred in  76.538 secs (2740014 bytes/sec)
9.0.0.txt:209715200 bytes transferred in  75.572 secs (2775038 bytes/sec)
9.1.0.txt:209715200 bytes transferred in  75.404 secs (2781221 bytes/sec)
9.2.0.txt:209715200 bytes transferred in  74.940 secs (2798441 bytes/sec)
10.0..txt:209715200 bytes transferred in  76.782 secs (2731306 bytes/sec)
10.1..txt:209715200 bytes transferred in  76.181 secs (2752854 bytes/sec)
11rc5.txt:209715200 bytes transferred in  77.336 secs (2711740 bytes/sec)