diff options
Diffstat (limited to 'gitlab/issues/target_arm/host_arm/accel_missing')
4 files changed, 0 insertions, 133 deletions
diff --git a/gitlab/issues/target_arm/host_arm/accel_missing/1167.toml b/gitlab/issues/target_arm/host_arm/accel_missing/1167.toml deleted file mode 100644 index 61fa71238..000000000 --- a/gitlab/issues/target_arm/host_arm/accel_missing/1167.toml +++ /dev/null @@ -1,15 +0,0 @@ -id = 1167 -title = "Does qemu-system-aarch64 support hyper-v elightenment feature for windows for arm guest?" -state = "closed" -created_at = "2022-08-22T02:16:26.062Z" -closed_at = "2022-08-26T18:36:24.560Z" -labels = ["host: arm", "kind::Feature Request", "target: arm"] -url = "https://gitlab.com/qemu-project/qemu/-/issues/1167" -host-os = "n/a" -host-arch = "n/a" -qemu-version = "n/a" -guest-os = "n/a" -guest-arch = "n/a" -description = "n/a" -reproduce = "n/a" -additional = "n/a" diff --git a/gitlab/issues/target_arm/host_arm/accel_missing/1776.toml b/gitlab/issues/target_arm/host_arm/accel_missing/1776.toml deleted file mode 100644 index cba40af60..000000000 --- a/gitlab/issues/target_arm/host_arm/accel_missing/1776.toml +++ /dev/null @@ -1,15 +0,0 @@ -id = 1776 -title = "qemu-armel SEGFAULTs when trying to map a commpage on armel" -state = "closed" -created_at = "2023-07-21T15:29:42.247Z" -closed_at = "2023-08-24T12:02:03.890Z" -labels = ["host: arm", "kind::Bug", "linux-user", "target: arm"] -url = "https://gitlab.com/qemu-project/qemu/-/issues/1776" -host-os = "n/a" -host-arch = "n/a" -qemu-version = "n/a" -guest-os = "n/a" -guest-arch = "n/a" -description = "n/a" -reproduce = "n/a" -additional = "n/a" diff --git a/gitlab/issues/target_arm/host_arm/accel_missing/1857.toml b/gitlab/issues/target_arm/host_arm/accel_missing/1857.toml deleted file mode 100644 index 57effb592..000000000 --- a/gitlab/issues/target_arm/host_arm/accel_missing/1857.toml +++ /dev/null @@ -1,60 +0,0 @@ -id = 1857 -title = "Major qemu-aarch64 performance slowdown since commit 59b6b42cd3" -state = "closed" -created_at = "2023-09-01T14:00:23.709Z" -closed_at = "2023-09-01T15:15:06.829Z" -labels = ["host: arm", "host: loongarch64", "target: arm"] -url = "https://gitlab.com/qemu-project/qemu/-/issues/1857" -host-os = "Gentoo Linux & Ubuntu & Debian" -host-arch = "loongarch64 & aarch64 & x86_64" -qemu-version = "8.0.0, 8.1.0 and master" -guest-os = "Linux user" -guest-arch = "AArch64" -description = """I have observed a major performance slowdown between qemu 8.0.0 and 8.1.0: - - -qemu 8.0.0: 0.8s - -qemu 8.1.0: 6.8s - - -After bisecting the commits between 8.0.0 and 8.1.0, the offending commit is 59b6b42cd3: - - -commit 59b6b42cd3446862567637f3a7ab31d69c9bef51 -Author: Richard Henderson <richard.henderson@linaro.org> -Date: Tue Jun 6 10:19:39 2023 +0100 - - target/arm: Enable FEAT_LSE2 for -cpu max - - Reviewed-by: Peter Maydell <peter.maydell@linaro.org> - Signed-off-by: Richard Henderson <richard.henderson@linaro.org> - Message-id: 20230530191438.411344-21-richard.henderson@linaro.org - Signed-off-by: Peter Maydell <peter.maydell@linaro.org> - - -Reverting the commit in latest master fixes the problem: - -qemu 8.0.0: 0.8s - -qemu 8.1.0: 6.8s - -qemu master + revert 59b6b42cd3: 0.8s - -Alternatively, specify `-cpu cortex-a35` to disable LSE2: - -`time ./qemu-aarch64 -cpu cortex-a35`: 0.8s - -`time ./qemu-aarch64`: 6.77s - -The slowdown is also observed when running qemu-aarch64 on aarch64 machine: - -`time ./qemu-aarch64 /usr/bin/node -e 1`: 2.91s - -`time ./qemu-aarch64 -cpu cortex-a35 /usr/bin/node -e 1`: 1.77s - -The slowdown on x86_64 machine is small: 362ms -> 378ms.""" -reproduce = """1. Run `time ./qemu-aarch64 node-aarch64 -e 1` (node-aarch64 is NodeJS v16 built for AArch64) -2. Using qemu master, the output says `0.8s` -3. Using qemu master with commit 59b6b42cd3 reverted, the output says `6.77s`""" -additional = """""" diff --git a/gitlab/issues/target_arm/host_arm/accel_missing/2884.toml b/gitlab/issues/target_arm/host_arm/accel_missing/2884.toml deleted file mode 100644 index 9f9f7e14c..000000000 --- a/gitlab/issues/target_arm/host_arm/accel_missing/2884.toml +++ /dev/null @@ -1,43 +0,0 @@ -id = 2884 -title = "Questions about vfio-pci" -state = "opened" -created_at = "2025-03-27T09:32:21.969Z" -closed_at = "n/a" -labels = ["VFIO", "host: arm", "target: arm"] -url = "https://gitlab.com/qemu-project/qemu/-/issues/2884" -host-os = "n/a" -host-arch = "ARM" -qemu-version = "qemu v6.2.0 (qemu v8.2.0 also reproduces)" -guest-os = "n/a" -guest-arch = "n/a" -description = """When I use VFIO-PCI to pass through an hns3 device and load the driver to the VM to enable the hns3 network port, there is a possibility that the failure occurs.""" -reproduce = """1. Start the VM and load the hns3 driver. -2. enable net port - - `ifconfig eth0 10.10.10.10/24 up` -3. ping host - - `ping 10.10.10.11 -c 3`""" -additional = """I have the following findings: - -1. The problem can be reproduced in different kernel versions and QEMU versions. -2. The problem does not recur when the number of vCPUs is 1. -3. It is irrelevant to the GIC version. - -the hns3 relately logic: - -{width="394" height="285"} - -If the VM has two vCPUs, "ifconfig eth0 10.10.10.10/24 up" command performs two sequential enable_irq operations(vector_num=2). The enable_irq will trap into KVM for interrupt configuration and exit to QEMU for PCI device emulation. When emulating interrupt enabling in QEMU, vfio\\_\\[intx/msi/msix\\]\\_enable calls vfio_disable_interrupts to disable all interrupts on the vdev. - -{width="455" height="266"} - -vfio_disable_interrupts in QEMU calls the kernel vfio driver interface vfio_pci_set_irqs_ioctl - -{width="404" height="127"} - -dump stack as above. and then its_irq_domain_deactivate will call its_send_discard to discard the interrupt on the device. - -If an interrupt is handled after the first enable_irq but the second enable_irq discards it, this inconsistency leads to network port enablement failures. - -It puzzles me. why does the vfio-pci disable all interrupts of the device before enabling irqs?""" |