2020, the year of the Rat
Have a good new Year everyone!
Janne and Ritsuko
Naha airport has square windows toward the runway that make for a neat natural frame if you manage to catch a moment without people sitting or standing in front of them. This is Ritsukos idea by the way; I just copied her.
The conference is held at the Colorado Convention Center. It's right in the middle of the city, a couple of blocks from the main walking street.
Immersion water cooling displays are always fun. You can see the liquid boiling away from the CPU in this image. It's clear that water cooling in some form is going to be mandatory for most high-performance clusters in the near future; Racks are getting denser and CPUs and GPUs more power hungry. Air is just not enough any longer.
Yes, AMD had juggling presenters in their booth this year. AMD is one of the big winners in HPC nowadays; they certainly deserve a bit of silliness.
Denver in the morning.
Dell rented the Denver Hard Rock Cafe for their event. Like most events you can get a ticket by just asking for one at the booth. We picked the Dell and HP events over the others this year simply because the weather was cold (it started snowing this night) and these events were close by.
Lots of cool-looking airplanes here.
The conference has a total of 15000 attendees; even though far from everyone attends the party you still need a large venue to hold so many people. Such as a large aircraft hangar for instance.
The last days it started snowing. I haven't experienced winter weather for years so I really enjoyed it.
I went running, of course. It's a great antidote for jetlag, and a quick way for some sightseeing. Here an amusement park closed for the season.
Snowed-in scooters. The winter weather really got going the day we left. And we were lucky — just a couple days later Denver got completely snowed in with all flights cancelled. Two days earlier and 15000 attendees would have been unable to leave.
It's a short flight, and along the way you get a good view of the Kerama islands.
Small island. Small airplane. I will say this though: These Bombardiers are really comfortable. Quiet, smooth and with plenty of legroom. Nothing like turboprops of old.
The "tatami rock" is one of the few real tourist spots. It's vertical columns of volcanic rock that solidified in a hexagonal pattern. It's pretty, and during low tide there's plenty of small animals in the rock pools that form.
Sugar cane fields. Very Okinawa.
The village is very quiet at night. Peaceful or unsettling depends on your mood, I guess.
There are only a few places to eat lunch. One of them does have pretty good shaved ice for dessert. Ice cream and brown sugar topping.
The south-eastern end of the island is strikingly beautiful.
A bit of coast close to the new Parco City shopping mall. Easy to get to with a bicycle. Hopeless with a car since there's no place to park around here.
A typical station by a Yamaha bike shop. Not coincidentally, the bicycles seem to all be Yamaha as well.
They're extending the increasingly popular monorail. This is the future Ishimine station.
A Yamaha PAS With bicycle. You can see the small motor control by the left handle and the larger rental terminal (with GPS and cellular connection) in the center.
This is actually quite a nice bicycle and well suited for its intended use. But it is quite small for me; the saddle is as high as it will go. The curved handlebars are good for manoeuvring it around a parking lot but get a bit too close to be comfortable when bicycling.
The bicycles also come in a very nice powder blue.
A walking path near Shuri castle.
The entrance to Urasoe Yodore, an old royal burial tomb.
LED lights is another revolutionary change we don't even think about. But it's almost as big a change as going to electric bulbs from gas and oil was a century ago.
Apparently the future still includes propeller aircraft and disembarking right onto the runway. This makes me irrationally happy.
2019 Prius. It's blue. It's also very comfortable. And blue.
Nagai station, Midosuji line, Osaka.
Sleepy. Amemura, Osaka.
Connecting. Shinsaibashi, Osaka.
Crepe L'Oriant. Minamisenba, Osaka.
HEP5, Umeda. Osaka.
Neat architecture. Nagai, Osaka.
Complicated! Nagahori, Osaka.
"snap install nextcloud", then edit the Nginx config so "https://cloud.bonsamatic.com" points at the nextcloud app.
Very retro. Kobe.
Midosuji line, Osaka.
Work is over. Relax. Nagai park, Osaka.
Distance I run per week (green bars) and the average Polar "running index" (red line).
You see a lot of stuff when you run. Here a tiny "dekotora" ("decoration truck") near the airport in Naha.
My weight over the past three years. The line is a two-week average.
Sunset in Osaka. Drawback of running is, you can't bring a good camera.
Do people still use desktops? Yes, many do. Do people bring their desktops — and monitor, and keyboard, and mouse — with them when they travel? No, normal people don't. Somebody must have forgotten to tell this guy. Supercomputing 17, Denver.
I didn't think to take a picture of the card until I had already installed it. Besides, for all that I like computers in principle, seeing modern hardware if often as exciting as watching paint dry. Instead, here's a Cray 1 supercomputer on display at the Supercomputing conference in Dallas last year.
$ sudo apt purge nvidia*
$ sudo apt autoremove
$ sudo apt install mesa-vulkan-drivers vulkan-utils mesa-vulkan-drivers:i386 libvulkan-dev dkms
Dotted lines are OpenGL, solid lines are Vulkan. The blue pair is my old card, the red pair is the new one. The red, horizontal line marks 60 frames/s; you ideally want the graphics to be faster than this at all times.
sudo apt install clinfo mesa-opencl-icd opencl-headers
$ cd /usr/lib/x86_64-linux-gnu/
$ sudo ln libOpenCL.so.1 libOpenCL.so
$ gcc vec_add.c -o vec_add -lOpenCL -lm
final result: 1.000000
As it happened, the Naha Marathon was right on the morning of the JLPT. Spent half an hour watching the endless stream of runners passing by as they ran through the city center.
The Convention Center is a really pleasant facility. Most of it — the park, especially — is open to anybody when there's no event happening here.
Part of the test hall. Bad shot; sorry about that.
Just a house. It's not notable, it doesn't appear in any guidebook or anything. But it is pretty neat, and I would never have seen it if I hadn't sat the JLPT nearby and walked back.