Longest compiling

Buffoon · Veteran Joined: 17 Jun 2015 Posts: 1369 Location: EU or US

Louisiana historic flood of 2016 surprised me at 3 AM in the morning. I grabbed my laptop, two little dogs and one other thing and headed for highway thru 2.5 feet deep water. All my equipment was submerged, as everything else in the house.
Sitting in the hotel now I decided to upgrade chromium. As I do not want to kill my laptop I'm building with -j1 and the i5 CPU is tuned down to 1.2 GHz.

eccerr0r · Posted: Tue Sep 20, 2016 1:42 am Post subject:

Surprised it's taking that long, then again, not really - chromium is one of the nasties which includes openoffice, firefox, llvm, and webkit-gtk.

I let my i5 laptop go full bore, using both threads of both cores when building (-j4). Turboboost speed is circa 2.6GHz. I have never tried building chromium but suspect it's pretty bad. I am just too lazy to hook up ethernet, and chances are, the i/o latency of shuffling files back and forth won't be much of a speedup if the local CPU isn't used as well.

Do you have distcc enabled with no hosts and no localhost distcc? It might be slower than it should be because it's timing out contacting servers.

My worst compile was about 3 days build time, probably 4 days overall because it died a few times and I had to go fix it. This was centericq on a 16.7 MHz, 24MB MIPS R2000 (NetBSD). Since it was C++, it was swapping very badly and its disk is slow.

Sorry for your flood losses, but yeah, not sure it's allowed per rules as it's still an advertisement. At best it goes in OTW.
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Intel Core i7 2700K/Radeon R7 250/24GB DDR3/256GB SSD
What am I supposed watching?

Buffoon · Veteran Joined: 17 Jun 2015 Posts: 1369 Location: EU or US

It finished!

Now I got this ...

Buffoon · Veteran Joined: 17 Jun 2015 Posts: 1369 Location: EU or US

Fascinating. It so happened I had ccache enabled, chromium rebuild took 1 hour 20 minutes.

arnvidr · l33t Joined: 19 Aug 2004 Posts: 629 Location: Oslo, Norway

Not long in itself, but I recently had a couple of packages that have ballooned something insane in compile time. I have no idea why these two packages have decided to go crazy on me, when something normally huge, like libreoffice, has remained stable when it comes to compile times. Anyone else seen this?

Hu · Moderator Joined: 06 Mar 2007 Posts: 21635

Swap devices are normally much slower than main memory. If your system requires extensive swapping to build the package, the wall time required will increase significantly, even though the CPU time will stay about the same.

eccerr0r · Posted: Wed Sep 21, 2016 7:38 am Post subject:

Fun with the R2000 machine I was compiling on - the machine does not support DMA, so there's plenty for the CPU to do when it's swapping :D
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Intel Core i7 2700K/Radeon R7 250/24GB DDR3/256GB SSD
What am I supposed watching?