On 2013-06-07, David Taylor <[email protected]> wrote: > On 07/06/2013 16:17, unruh wrote: >> On 2013-06-07, David Taylor <[email protected]> wrote: >>> On 06/06/2013 20:17, Doug Calvert wrote: >>>> unruh has a nice page about interrupt coalescing: >>>> >>>> http://axion.physics.ubc.ca/scatter/rt.html >>> >>> This is a quite interesting note, unfortunately rendered rather less >>> useful by the graphs, which have no axis names or units marked, and >>> which appear to have inconsistent scales (although this may simply be >>> lack of legibility). For example: >>> >>> http://axion.physics.ubc.ca/scatter/rtdt1.gif >>> >>> The units on the vertical axis appear to be labelled: >>> >>> -0.0001 -5x10-6 0 5x10-6 0.0001 >> >> Yes, supermongo, the plotting program, does tend to make 5 and 6 similar >> at the small sizes used in superscripts. But as you say, it is a linear >> scale, and thus that must be a 5 rather than a 6. >>> >>> which I interpret as -100us, -5 us, 0, +5us +100us, but it appears to >> >> Since that is, as you point out, an interpretation that produces silly >> results, it is probably the interpretation that is at fault. >>> be a linear axis. Is the 5x10-6 supposed to be 5x10-5? The character >>> needs serious improvement as it looks like 5x10-6 to me. But in any >>> case, as microseconds are referred to in the text, would it not be a lot >>> clearer if the graphs were also in microseconds, rather than some small >>> fraction of seconds? >>> >>> Similar problems in: >>> >>> http://axion.physics.ubc.ca/scatter/gps.gif >>> >>> where the -5 and -6 suffices are very difficult to distinguish. I do >>> hope that Bill can re-do these graphs some time as it would enhance the >>> value of this work. >> >> I am not at all sure that I can find the data anymore to redo the >> graphs. >> About all I could do is to use gimp to replace the axes labels and make >> the 5 look a bit more like 5 rather than 6. The problem is at the small >> scale of the superscripts, the little culicue up at the bottom of the 5 >> in the font used becomes a single pixel closing off the the loop, making >> it look a lot like a 6. So I used gimp to open it up again, and also to >> labels on the axes. > > Thanks, Bill. Sounds like an update to "supermongo" is needed! Can it > label the axes? Not critical to regenerate the graphs, but perhaps if > you add a little to the text to clarify scales and axes it may help others.
I did use gimp to label the axes and scales and to make the 5's look like 5's. I think tht the problem is that the font used for 6 pixel high text makes 5 look like 6. Have a look again to see if it is better. > > Cheers, > David _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
