| | <<<Back 1 day (to 2019/06/15) | Fwd 1 day (to 2019/06/17) >>> | 20190616 |
| voices | Robin_Watts & kens: i figured it out/ | 01:10.35 |
| | can ghostscript help to embed LaTeX fonts in a pdf or svg file? | 15:49.57 |
| | so that i can open it with inkscape/illustrator/etc | 15:50.34 |
| ray_laptop | voices: Ghostscript doesn't produce SVG, but it does embed fonts. The somewhat tricky part is that Ghostscript has to have the fonts available to it. kens is the expert on pdfwrite, and he and chrisl are our font experts | 17:28.06 |
| | voices: in doc/Use.htm check the "How Ghostscript finds fonts" section. | 17:29.13 |
| | voices: also, if you don't use -q or -dQUIET Ghostscript will spew debug messages as it loads fonts, and also about any fonts it can't find. In general, the PDF will contain font subsets for the fonts it uses (there are advanced options to prevent this, but it doesn't sound like what you want anyway) | 17:31.56 |
| voices | ray_laptop: i'm not sure.. i'll paste my session, it'll make more sense than if i explain it | 18:17.46 |
| ray_laptop | voices: make sure it has the gs conversion log (to -sDEVICE=pdfwrite) | 19:20.03 |
| | Robin_Watts: I put the system on the (supposedly) fast 256Gb chip, and it is about 1/2 the speed of the 32Gb chip (same OS, just dd'ed and resized) :-( I ran USB flash drives (tried several) and I saw write speeds from 4Mb/s up to 18Mb/s, and read speeds from 7Mb/s up to 38Mb/s | 20:07.03 |
| | the fastest was a Toshiba 64Gb (I don't have any larger). I tried that same chip on my laptop and on a USB 3 slot it writes at 28Mb/s and reads at 138Mb/s, but on a USB 2 slot, it drops to 18Mb/s write, 67Mb/s read. | 20:10.59 |
| | I was surprised to see that much of a drop due to interface mode. Makes the pi USB look like it's reasonable. | 20:12.35 |
| | Robin_Watts: what speeds do you see to the SD card and to the USB flash drive: dd if=/dev/zero bs=512k count=2000 of=___ (for write timing), echo 3 | tee /proc/sys/vm/drop_caches ; dd of=/dev/null bs=512k if=___ | 21:11.12 |
| | ___ on the sd card could just be /test.dat and on the USB /media/pi/---/test.dat where --- is the name shown with 'df' | 21:12.38 |
| Robin_Watts | For /test.dat (SD) I get: 14.4MB/s write, 23MB/s read | 22:37.47 |
| | For /mnt/usb256/test.dat (USB) I get: 25.9 and 31.2 read. | 22:40.26 |
| | So USB looks like the winner to me. | 22:42.00 |
| | I'm using a samsung 32GB microSD and a SanDisk Ultra Fit USB 3.1 Flash Drive | 22:42.55 |
| | I wonder if we should get some more pis. | 22:43.09 |
| | A couple for the office, and one for henrys, so we have 5 split across the sites. | 22:43.43 |
| | I guess it depends how much testing we expect to do on them. | 22:44.10 |
| | 1 pi would take 30 hrs to run the normal set of gs tests, I guess. 5 would get that down to 6, so we could probably run nightly mupdf/gs/gs_cal tests on the pi. | 22:45.50 |
| | Supposedly thermal throttling is a bit thing on the pi's. We might do well to get something like: | 22:52.23 |
| | https://www.amazon.co.uk/GeeekPi-Raspberry-Aluminum-Cooling-Heatsink/dp/B07GBV3D31/ref=sr_1_3?keywords=Raspberry%2BPI3b%2B%2Bheatsinks&qid=1560723597&s=gateway&sr=8-3&th=1 | 22:52.46 |
| ray_laptop | Robin_Watts: all my Pi's have little Al heatsinks | 23:07.42 |
| | I wonder if there is a way to tell if thermal throttling is happening, or even what the CPU core temp is | 23:08.51 |
| ray_laptop | googles... | 23:09.01 |
| | Robin_Watts: apparently the pi3 (not pi3+), or at least the OS I have doesn't have 'vcgencmd get_throttled', but 'vcgencmd measure_temp' reports 46.2 C (plenty cool) on pi3 | 23:18.41 |
| | so we could collect the temps every 5 or 10 minutes while running a test. One site said default thermal throttling doesn't happen until > 80 C (but another said that it showed a lower clock at 70C) | 23:21.12 |
| | on pi3 'vcgencmd measure_clock arm' reports a rather bogus: frequency(45)=600000000 | 23:22.18 |
| | (600 MHz seems SLOW) | 23:22.56 |
| | particularly since pi.ghostscript.com reports frequency(45)=700072000 | 23:24.34 |
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