[Libguestfs] Long running nbdkit tests

The nbdkit tests take a long time to run especially on armv7. To try to get an idea of which tests take the most time, and since I happen to have a qemu aarch64 *TCG* guest available, I ran the tests on that guest. A TCG guest is about the worst case for libguestfs, used by some tests, since it uses double-nested TCG, and as you can see below there are tests taking over 6 hours. In fact I didn't complete the run yet. test-cow.sh is still running (after 2+ hours) and there may be further tests to come. Results: 06:43:00 PASS: test-cache.sh 06:37:48 PASS: test-cache-on-read.sh [ test-cow.sh possibly here ] 00:35:41 PASS: test-partitioning3.sh 00:34:29 PASS: test-partitioning5.sh 00:34:03 PASS: test-linuxdisk-copy-out.sh 00:33:58 PASS: test-floppy.sh 00:30:45 PASS: test-partitioning2.sh 00:28:41 PASS: test-linuxdisk.sh 00:28:34 PASS: test-iso.sh 00:02:59 PASS: test-cache-max-size.sh 00:02:58 PASS: test-partitioning6.sh 00:02:55 PASS: test-partitioning4.sh 00:02:51 PASS: test-eflags.sh 00:01:11 PASS: test-export-name.sh 00:01:01 PASS: test-parallel-sh.sh 00:00:54 PASS: test-python.sh 00:00:44 PASS: test-sh-errors.sh 00:00:44 PASS: test-cacheextents.sh 00:00:41 PASS: test-sh-extents.sh 00:00:35 PASS: test-info-base64.sh Ignoring the ones which take mere minutes (those run in seconds on more reasonable hardware), here is a summary of how the tests are implemented: test-cache.sh Gx2 F D test-cache-on-read.sh Gx2 F D test-cow.sh Gx3 F test-partitioning3.sh G test-partitioning5.sh G F test-linuxdisk-copy-out.sh G Dx4 test-floppy.sh G Dx2 test-partitioning2.sh G F test-linuxdisk.sh G D test-iso.sh G D = using libguestfs download or similar APIs F = using libguestfs "fill" APIs which write lots of data G = guestfish xN = runs multiple times So there's quite a strong correlation between multiple runs of guestfish, and using those two APIs, and time taken. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-builder quickly builds VMs from scratch http://libguestfs.org/virt-builder.1.html