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Diffstat (limited to 'results/classifier/deepseek-2-tmp/output/performance/1756807')
| -rw-r--r-- | results/classifier/deepseek-2-tmp/output/performance/1756807 | 68 |
1 files changed, 0 insertions, 68 deletions
diff --git a/results/classifier/deepseek-2-tmp/output/performance/1756807 b/results/classifier/deepseek-2-tmp/output/performance/1756807 deleted file mode 100644 index fc79fd7e7..000000000 --- a/results/classifier/deepseek-2-tmp/output/performance/1756807 +++ /dev/null @@ -1,68 +0,0 @@ - -performance regression in qemu-user + proot - -To reproduce: - -1. Install qemu-user-static and proot -2. Enter some arm chroot using them: - - proot -0 -q qemu-arm-static -w / -r chroot/ /bin/bash - -3. Run a command which normally takes a short but measurable amount of time: - - cd /usr/share/doc && time grep -R hello - -Result: - -This is over 100 times slower on 18.04 than it was on 16.04. I am not sure if proot or qemu is causing the problem, but proot version has not changed. Also note that on 16.04 I am using the cloud repo version of qemu, which is newer than 16.04 stock, but still older than 18.04. - -Although system 2 is lower spec than system 1, it should not be this much slower. No other software seems to be affected. - -If required I can supply a chroot tarball. It is essentially just a Debian bootstrap though. - -Logs: - - - -System 1: i7-6700 3.4GHz, 32GB RAM, 512GB Crucial MX100 SSD, Ubuntu 16.04 -qemu-arm version 2.10.1(Debian 1:2.10+dfsg-0ubuntu3.4~cloud0) -proot 5.1.0 - -al@al-desktop:~/rpi-ramdisk/raspbian$ proot -0 -q qemu-arm-static -w / -r root/ /bin/bash -root@al-desktop:/# cd /usr/share/doc -root@al-desktop:/usr/share/doc# time grep -R hello -dash/copyright:Debian GNU/Linux hello source package as the file COPYING. If not, - -real 0m0.066s -user 0m0.040s -sys 0m0.008s - - - - - -System 2: i5-5300U 2.30GHz, 8GB RAM, 256GB Crucial MX300 SSD, Ubuntu 18.04 -qemu-arm version 2.11.1(Debian 1:2.11+dfsg-1ubuntu4) -proot 5.1.0 - -al@al-thinkpad:~/rpi-ramdisk/raspbian$ proot -0 -q qemu-arm-static -w / -r root/ /bin/bash -root@al-thinkpad:/# cd /usr/share/doc -root@al-thinkpad:/usr/share/doc# time grep -R hello -dash/copyright:Debian GNU/Linux hello source package as the file COPYING. If not, - -real 0m24.176s -user 0m0.366s -sys 0m11.352s - -ProblemType: Bug -DistroRelease: Ubuntu 18.04 -Package: qemu (not installed) -ProcVersionSignature: Ubuntu 4.15.0-12.13-generic 4.15.7 -Uname: Linux 4.15.0-12-generic x86_64 -ApportVersion: 2.20.8-0ubuntu10 -Architecture: amd64 -Date: Mon Mar 19 07:13:25 2018 -InstallationDate: Installed on 2018-03-18 (0 days ago) -InstallationMedia: Xubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180318) -SourcePackage: qemu -UpgradeStatus: No upgrade log present (probably fresh install) \ No newline at end of file |