On Wed, Jan 20, 2016 at 09:26:06AM +0900, Mike Hommey wrote: > Having recently looked into this, the relevant travis-ci documentation > is: > https://docs.travis-ci.com/user/ci-environment/ > > which says all environments have 2 cores, so you won't get much from > anything higher than -j3. FWIW, I settled on "-j16" on my 8-core (well, hyperthreaded quad-core) machine after experimenting. That's running the tests on a RAM-disk, though. On a slower filesystem where fsync() actually does something, you're going to get a lot more I/O stalls, and want a bigger CPU to process multiplier. Here are actual numbers from my machine: -j | time (user+sys) ---+------------------ 1 | 5m18s (41s+17s) 2 | 2m24s (41s+14s) 4 | 1m15s (46s+13s) 8 | 0m56s (65s+18s) 16 | 0m53s (76s+24s) 32 | 0m57s (78s+25s) Note that the CPU-second times will go up with more threads because of the frequency scaling. So yeah, -j3 might not be that unreasonable, depending on the filesystem response times. > The https://docs.travis-ci.com/user/ci-environment/ document says the > default is "sudo: false" for repositories enabled in 2015 or later, which > I assume is the case for the git repository. "sudo: required" is the > default for repositories enabled before 2015. Thanks. The document I saw used the word "recognized", and I didn't quite know what they meant. We just enabled this a month or two ago, so we should be running on the new format. -Peff -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html