[Xen-devel] [linux-4.19 bisection] complete test-amd64-amd64-qemuu-nested-intel
branch xen-unstable xenbranch xen-unstable job test-amd64-amd64-qemuu-nested-intel testid debian-hvm-install/l1/l2 Tree: linux git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git Tree: linuxfirmware git://xenbits.xen.org/osstest/linux-firmware.git Tree: ovmf git://xenbits.xen.org/osstest/ovmf.git Tree: qemu git://xenbits.xen.org/qemu-xen-traditional.git Tree: qemuu git://xenbits.xen.org/qemu-xen.git Tree: seabios git://xenbits.xen.org/osstest/seabios.git Tree: xen git://xenbits.xen.org/xen.git *** Found and reproduced problem changeset *** Bug is in tree: xen git://xenbits.xen.org/xen.git Bug introduced: f96e1469ad06b61796c60193daaeb9f8a96d7458 Bug not present: 0729830cc425a8ff27a3137e87b93768ae3c853c Last fail repro: http://logs.test-lab.xenproject.org/osstest/logs/147382/ commit f96e1469ad06b61796c60193daaeb9f8a96d7458 Author: Roger Pau Monné Date: Wed Feb 5 13:49:09 2020 +0100 x86/vvmx: fix virtual interrupt injection when Ack on exit control is used When doing a virtual vmexit (ie: a vmexit handled by the L1 VMM) interrupts shouldn't be injected using the virtual interrupt delivery mechanism unless the Ack on exit vmexit control bit isn't set in the nested vmcs. Gate the call to nvmx_update_apicv helper on whether the nested vmcs has the Ack on exit bit set in the vmexit control field. Note that this fixes the usage of x2APIC by the L1 VMM, at least when the L1 VMM is Xen. Signed-off-by: Roger Pau Monné Reviewed-by: Kevin Tian For bisection revision-tuple graph see: http://logs.test-lab.xenproject.org/osstest/results/bisect/linux-4.19/test-amd64-amd64-qemuu-nested-intel.debian-hvm-install--l1--l2.html Revision IDs in each graph node refer, respectively, to the Trees above. Running cs-bisection-step --graph-out=/home/logs/results/bisect/linux-4.19/test-amd64-amd64-qemuu-nested-intel.debian-hvm-install--l1--l2 --summary-out=tmp/147382.bisection-summary --basis-template=142932 --blessings=real,real-bisect linux-4.19 test-amd64-amd64-qemuu-nested-intel debian-hvm-install/l1/l2 Searching for failure / basis pass: 147222 fail [host=fiano0] / 147024 [host=italia0] 146943 [host=godello0] 146901 [host=huxelrebe0] 146851 [host=godello1] 143841 ok. Failure / basis pass flights: 147222 / 143841 (tree with no url: minios) Tree: linux git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git Tree: linuxfirmware git://xenbits.xen.org/osstest/linux-firmware.git Tree: ovmf git://xenbits.xen.org/osstest/ovmf.git Tree: qemu git://xenbits.xen.org/qemu-xen-traditional.git Tree: qemuu git://xenbits.xen.org/qemu-xen.git Tree: seabios git://xenbits.xen.org/osstest/seabios.git Tree: xen git://xenbits.xen.org/xen.git Latest 9b15f7fae677336e04b9e026ff91854e43165455 c530a75c1e6a472b0eb9558310b518f0dfcd8860 70911f1f4aee0366b6122f2b90d367ec0f066beb d0d8ad39ecb51cd7497cd524484fe09f50876798 933ebad2470a169504799a1d95b8e410bd9847ef 76551856b28d227cb0386a1ab0e774329b941f7d 707db77a380b96025bae8bc4322da0b64819d3b7 Basis pass ef244c3088856cf048c77231653b4c92a7b2213c c530a75c1e6a472b0eb9558310b518f0dfcd8860 8d3f428109623096cb8845779cdf9dc44949b8e9 d0d8ad39ecb51cd7497cd524484fe09f50876798 933ebad2470a169504799a1d95b8e410bd9847ef c1ab7d7ed5306641784a9ed8972db5151a49a1a1 518c935fac4d30b3ec35d4b6add82b17b7d7aca3 Generating revisions with ./adhoc-revtuple-generator git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git#ef244c3088856cf048c77231653b4c92a7b2213c-9b15f7fae677336e04b9e026ff91854e43165455 git://xenbits.xen.org/osstest/linux-firmware.git#c530a75c1e6a472b0eb9558310b518f0dfcd8860-c530a75c1e6a472b0eb9558310b518f0dfcd8860 git://xenbits.xen.org/osstest/ovmf.git#8d3f428109623096cb8845779cdf9dc44949b8e9-70911f1f4aee0366b6122f2b90d367ec0f066beb git://xenbits.xen.org/qemu-xen-traditional\ .git#d0d8ad39ecb51cd7497cd524484fe09f50876798-d0d8ad39ecb51cd7497cd524484fe09f50876798 git://xenbits.xen.org/qemu-xen.git#933ebad2470a169504799a1d95b8e410bd9847ef-933ebad2470a169504799a1d95b8e410bd9847ef git://xenbits.xen.org/osstest/seabios.git#c1ab7d7ed5306641784a9ed8972db5151a49a1a1-76551856b28d227cb0386a1ab0e774329b941f7d git://xenbits.xen.org/xen.git#518c935fac4d30b3ec35d4b6add82b17b7d7aca3-707db77a380b96025bae8bc4322da0b64819d3b7 Use of uninitialized value $parents in array dereference at ./adhoc-revtuple-generator line 465. Use of uninitialized value in concatenation (.) or string at ./adhoc-revtuple-generator line 465. Loaded 13324 nodes in revision graph Searching for test results: 143841 pass ef244c3088856cf048c77231653b4c92a7b2213c c530a75c1e6a472b0eb9558310b518f0dfcd8860 8d3f428109623096cb8845779cdf9dc44949b8e9 d0d8ad39ecb51cd7497cd524484fe09f50876798 933ebad2470a169504799a1d95b8e410bd9847ef c1ab7d7ed5306641784a9ed8972db5151a49a1a1 518c935fac4d30b3ec35d4b6add82b17b7d7aca3 146851
[Xen-devel] [linux-4.19 bisection] complete test-amd64-amd64-qemuu-nested-intel
branch xen-unstable xenbranch xen-unstable job test-amd64-amd64-qemuu-nested-intel testid debian-hvm-install/l1/l2 Tree: linux git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git Tree: linuxfirmware git://xenbits.xen.org/osstest/linux-firmware.git Tree: qemu git://xenbits.xen.org/qemu-xen-traditional.git Tree: qemuu git://xenbits.xen.org/qemu-xen.git Tree: xen git://xenbits.xen.org/xen.git *** Found and reproduced problem changeset *** Bug is in tree: xen git://xenbits.xen.org/xen.git Bug introduced: dafd936dddbd7978d4131275ad1112f64457bf64 Bug not present: 1ecb1ee4d8475475c3ccf72f6654644b242ce856 Last fail repro: http://logs.test-lab.xenproject.org/osstest/logs/129524/ commit dafd936dddbd7978d4131275ad1112f64457bf64 Author: George Dunlap Date: Mon Oct 29 14:51:51 2018 + Make credit2 the default scheduler Credit2 was declared "supported" in 4.8, and as of 4.10 had two other critical features implemented (soft affinity / NUMA and caps). Why change the default? The code is better: more predictable, less jitter, easier to determine how modifications will affect overall behavior, easier in the future to make load-balancing behavior more subtle (e.g., taking into account the cost of powering up extra cores, ). Overall performance compared to Credit1 is somewhat of a mixed bag. Unfortunately most of what I have are tests using XenServer's internal perf testing system, so I can't share the raw data (via links anyway). Here is a summary of data from an internal e-mail Dario sent in the past: * DVDbench: On underloaded systems, credit2 outperformed credit1 by about 4%. On overloaded systems, credit2 underperformed by about 3%. * On a range of tests (unixbench, lmbench, ), credit and credit2 perform within 5% of each other (up and down). * Credit2 fairly consistently beats credit for TCP-style workloads. * Credit2 is sometimes equal to, sometimes 5-15% worse than, credit for synthetic CPU workloads (e.g., Dhrystone). * On LoginVSI, credit2 fairly consistently outperforms credit by about 10%. Credit2, like credit, has a number of workloads / setups for which performance could be improved. Personally I think networking and partially-loaded systems is going to be more representative of what Xen is actually used for; so I think credit2 is on the whole the better scheduler to use by default. And in any case, making those improvements on credit2 will be easier than on credit. Signed-off-by: George Dunlap Acked-by: Dario Faggioli For bisection revision-tuple graph see: http://logs.test-lab.xenproject.org/osstest/results/bisect/linux-4.19/test-amd64-amd64-qemuu-nested-intel.debian-hvm-install--l1--l2.html Revision IDs in each graph node refer, respectively, to the Trees above. Running cs-bisection-step --graph-out=/home/logs/results/bisect/linux-4.19/test-amd64-amd64-qemuu-nested-intel.debian-hvm-install--l1--l2 --summary-out=tmp/129524.bisection-summary --basis-template=129313 --blessings=real,real-bisect linux-4.19 test-amd64-amd64-qemuu-nested-intel debian-hvm-install/l1/l2 Searching for failure / basis pass: 129428 fail [host=elbling0] / 129313 [host=huxelrebe0] template as basis? using template as basis. Failure / basis pass flights: 129428 / 129313 (tree with no url: minios) (tree with no url: ovmf) (tree with no url: seabios) Tree: linux git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git Tree: linuxfirmware git://xenbits.xen.org/osstest/linux-firmware.git Tree: qemu git://xenbits.xen.org/qemu-xen-traditional.git Tree: qemuu git://xenbits.xen.org/qemu-xen.git Tree: xen git://xenbits.xen.org/xen.git Latest 07a03b97b9ce2a6430344386eeab9b16283b893f c530a75c1e6a472b0eb9558310b518f0dfcd8860 d0d8ad39ecb51cd7497cd524484fe09f50876798 de5b678ca4dcdfa83e322491d478d66df56c1986 2cf113891a38cc05434bc9876ffc107a990887be Basis pass 84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d c530a75c1e6a472b0eb9558310b518f0dfcd8860 9c0eed618f37dd5b4a57c8b3fbc48ef8913e3149 de5b678ca4dcdfa83e322491d478d66df56c1986 92666fdd6e0afab989b2d89759d9b43f2c645ae7 Generating revisions with ./adhoc-revtuple-generator git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git#84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d-07a03b97b9ce2a6430344386eeab9b16283b893f git://xenbits.xen.org/osstest/linux-firmware.git#c530a75c1e6a472b0eb9558310b518f0dfcd8860-c530a75c1e6a472b0eb9558310b518f0dfcd8860 git://xenbits.xen.org/qemu-xen-traditional.git#9c0eed618f37dd5b4a57c8b3fbc48ef8913e3149-d0d8ad39ecb51cd7497cd524484fe09f50876798 git://xenbits.xen.org/qemu-xen.git#de5b678ca4dcdfa83e322491d478d66df56c1986-de5b678ca4dcdfa83e322491d478d66df56c1986
