[Bug 1912777] Re: KVM_EXIT_MMIO has increased in Qemu4.0.0 when compared to Qemu 2.11.0

** Also affects: qemu (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1912777 Title: KVM_EXIT_MMIO has increased in Qemu4.0.0 when compared to

[Bug 1912777] Re: KVM_EXIT_MMIO has increased in Qemu4.0.0 when compared to Qemu 2.11.0

** Description changed: I was able to generate trace dump in Qemu for kvm_run_exit event in both QEMU 2.11.0 and QEMU 4.0.0 From the trace i noticed that the number of KVM_KXIT_MMIO calls has increased alot and is causing delay in testcase execution. I executed same testcase from Qemu

[Bug 1912777] Re: KVM_EXIT_MMIO has increased in Qemu4.0.0 when compared to Qemu 2.11.0

** Changed in: qemu Status: New => Opinion -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1912777 Title: KVM_EXIT_MMIO has increased in Qemu4.0.0 when compared to Qemu 2.11.0 Status in

[Bug 1912777] Re: KVM_EXIT_MMIO has increased in Qemu4.0.0 when compared to Qemu 2.11.0

One observation i made was that adding qemu arguments "-nic none" improved the testcase performance. Does "-nic none" reduce KVM_EXIT_MMIO ? Are there any other qemu arguments that can be used to improve qemu overall performance ? -- You received this bug notification because you are a member

[Bug 1912777] Re: KVM_EXIT_MMIO has increased in Qemu4.0.0 when compared to Qemu 2.11.0

Could someone update on this? ** Changed in: qemu Status: Incomplete => New -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1912777 Title: KVM_EXIT_MMIO has increased in Qemu4.0.0 when

[Bug 1912777] Re: KVM_EXIT_MMIO has increased in Qemu4.0.0 when compared to Qemu 2.11.0

The testcase is a rather a very basic one. Doing a mmap on a pcie device and triggering a read and write operation on the Virtual Address, which would in-turn trigger transaction requests on the host device. I understand that Qemu v4.0 may be and old one, but the issue is that test case

[Bug 1912777] Re: KVM_EXIT_MMIO has increased in Qemu4.0.0 when compared to Qemu 2.11.0

Can you provide a link to the test case that you used? Otherwise, can you try to bisect the problem? Can you please also try with the latest version of QEMU? v4.0 is rather old already. ** Information type changed from Public Security to Public ** Changed in: qemu Status: New =>

[Bug 1912777] Re: KVM_EXIT_MMIO has increased in Qemu4.0.0 when compared to Qemu 2.11.0

** Information type changed from Private Security to Public Security ** Also affects: ubuntu Importance: Undecided Status: New -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1912777 Title: