<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"></head><body><div>Is your speed problem limited to disk access, or is it also CPU related? Running in a browser might mean that the disk access is going through the network, which can slow it down excessively, There are several bottlenecks on a system, like slow disks, that don't effect other aspects, like instruction speed, it's important to determine exactly where the speed limits exists.</div><div>CPU instruction speed, excessive swapping, disk bandwidth, terminal baud water, . .. They can all be a problem, and it can be more than one at a time.</div><div><br></div><div><br></div><div><br></div><div id="composer_signature"><div style="font-size:85%;color:#575757" dir="auto">Sent from my Galaxy Tab® A</div></div><div><br></div><div style="font-size:100%;color:#000000"><!-- originalMessage --><div>-------- Original message --------</div><div>From: Jacob Goense <dugo@xs4all.nl> </div><div>Date: 12/12/16 12:13 PM (GMT-07:00) </div><div>To: simh@trailing-edge.com </div><div>Subject: [Simh] Reference performance benchmarks </div><div><br></div></div>I'm running simh in rather tight corners. Mostly VAX/780 and PDP-11/70<br>with V6 or BSD. Simh runs in a browser, or, I have (too) many of them<br>on underpowered Asus Eee PC's. Any tips on how I can check if I have<br>taken things too far? Like minimum values to look for in SHOW CLOCK,<br>or any tools I can run that can be referenced against same on real kit.<br><br>I run into the same question on the I/O end. During the installation<br>of v6 I can do dd if=/dev/mt0 of=/dev/rk1 bs=2048 count=1000 skip=1025<br>and it is done in a second on machine that is doing nothing else. With<br>simh running in a browser on a small busy machine it can take up to an<br>hour. I have no idea how to gauge how far this is off from real kit.<br>_______________________________________________<br>Simh mailing list<br>Simh@trailing-edge.com<br>http://mailman.trailing-edge.com/mailman/listinfo/simh</body></html>