Hi Igor I didn't measure the time taken using time as many things I was checking how it works with different options etc. It took me around 4-5 hours in my estimate. I could have made it faster had I used an SDD for the swapfile.
I was building the branch as described here: https://github.com/antmicro/kvm-aosp-jetson-nano. "*For those who is limited with resources, It can be stripped even more, (one can save ~16gb by removing .repo dir, some memory can be recovered by using zram/compressed swap, and couple more gbs can be saved by using btrfs with compression set to zstd=3,* * mount ... -o compress=zstd:3 * * btrfs property set /build/aosp/out compression* " Does this save RAM or disk space ? Thanks On Thursday, June 10, 2021 at 7:29:05 AM UTC+5:30 igo...@gmail.com wrote: > Hi, > what was the overall compilation time though, Mr. Ravishankar? (Also, what > branch/tag, board and make target were used?) > > For those who is limited with resources, It can be stripped even more, > (one can save ~16gb by removing .repo dir, some memory can be recovered by > using zram/compressed swap, and couple more gbs can be saved by using btrfs > with compression set to zstd=3, > mount ... -o compress=zstd:3 > btrfs property set /build/aosp/out compression "" > To get some extra boost to compilation speed (in this configuration it'll > be more about preventing CPU choking), pass "mitigations=off selinux=0 > audit=0" as kernel options and reboot; to run builds, try to stay lean > (make snod, m - ok, make all - not ok since it'll build some tests). > > And since this is not super obvious for some people, -Xmx4g is required in > this case because Java won't allocate enough heap without it, if there's > not enough physical memory. To investigate what takes time, one can open > build trace: > > Just open $OUT_DIR/build.trace.gz in Chrome’s chrome://tracing, > > Enjoy, > > On Wed, Jun 9, 2021 at 4:25 AM Ravishankar S <ravishan...@gmail.com> > wrote: > >> I have completed by AOSP build on a 4 core 8GB machine with the following >> specs: >> >> Ryzen 3 3300u, 1TB HDD, 8GB Dual channel RAM. >> Usable is 5.81G when fully booted into Kubuntu 20.04 (no apps running) >> >> 1) FIrst enable the zram on you system and reboot: sudo apt install >> zram-config. >> >> 2) Default swapfile size is 2G. Its barely sufficient for the initial >> soong_ui phase. Just scraped through. It should be increased to least 4GB. >> If you have the swapfile on SSD or can move it to an SSD then its even >> better. >> >> (For sure this phase takes a lot of RAM (~12G) and lots of disk IO. It >> will take more time than normal as there is lots of swapping) >> >> 3) Still in case the soong_ui phase does not get through then you can >> try to reduce reduce the number of jobs say m -j3 or m -j2. >> >> 4) The next phase is just compilation and other stuff that is not RAM >> intensive but mainly CPU and some Disk I/O. You can speed up this phase >> slightly by using tmfs for the /tmp folder. >> >> 5) The last phase is the documentation where Java is used and for this no >> amount of swap space will help and the system will crash for sure. We have >> the use the solution provided here and restart the make with just 1 job (m >> -j1) >> >> >> https://stackoverflow.com/questions/60468693/java-outofmemoryerror-when-building-aosp-10/60474592#60474592 >> >> export _JAVA_OPTIONS="-Xmx4g" >> >> You can try to use m-j2 but it seemed fast enough with m -j1 and less >> pressure on RAM. >> >> Other resources are: 110GB disk space after checkout and 170GB after >> build. >> >> >> >> >> -- >> -- >> You received this message because you are subscribed to the "Android >> Building" mailing list. >> To post to this group, send email to android-...@googlegroups.com >> To unsubscribe from this group, send email to >> android-buildi...@googlegroups.com >> For more options, visit this group at >> http://groups.google.com/group/android-building?hl=en >> >> --- >> You received this message because you are subscribed to the Google Groups >> "Android Building" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to android-buildi...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/android-building/bc27d026-a038-46c1-9143-c745e40a3b65n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/android-building/bc27d026-a038-46c1-9143-c745e40a3b65n%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- -- You received this message because you are subscribed to the "Android Building" mailing list. 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