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OpenVMM:Add support for Baremetal Guest and VFIO Passthrough.#4564

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OpenVMM:Add support for Baremetal Guest and VFIO Passthrough.#4564
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users/vyadav/openvmm-baremetal

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@vyadavmsft vyadavmsft commented Jun 29, 2026

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Description

Summary

Add OpenVMM baremetal guest support and VFIO passthrough support for LISA, including guest provisioning, networking, forwarded SSH, storage attachment, and passthrough cleanup.

Changes

  • Add OpenVMM guest platform wiring for baremetal-hosted guests.
  • Add VFIO passthrough support with host PCI device allocation, vfio-pci binding, PCIe topology arguments, and driver restoration on cleanup.
  • Update OpenVMM launch command generation for explicit SCSI controller and disk attachment syntax.
  • Support forwarded SSH for OpenVMM tap networking, including non-default host NIC routing.
  • Harden forwarding cleanup by tracking only inserted iptables rules and restoring host forwarding state safely.
  • Avoid requiring optional libvirt imports on generic OpenVMM module import paths.
  • Add and update selftests for OpenVMM schema, installer, launch, networking, runner behavior, and mock platform coverage.

Related Issue

Type of Change

  • Bug fix
  • New feature
  • Breaking change
  • Refactoring
  • Documentation update

Checklist

  • Description is filled in above
  • No credentials, secrets, or internal details are included
  • Peer review requested (if not, add required peer reviewers after raising PR)
  • Tests executed and results posted below

Test Validation

Key Test Cases:

Impacted LISA Features:

Tested Azure Marketplace Images:

Test Results

Image VM Size Result
PASSED / FAILED / SKIPPED

Add the OpenVMM guest path for baremetal runs, including TAP networking, guest lifecycle wiring, and platform integration.

Harden iDRAC recovery and transient power/job handling for baremetal hosts.

Make OpenVMM source installs more reliable by serializing Rust toolchain setup, resolving Cargo paths, refreshing source checkouts, and extending the rustup install timeout.
Add OpenVMM guest runbook fields for host device pools and passthrough requests. Allocate devices from the existing Linux VFIO device-pool path, pass assigned PCI BDFs to OpenVMM with --vfio, and release reservations during guest cleanup.
Bind allocated OpenVMM passthrough PCI devices to vfio-pci before launch so the expected /dev/vfio/<iommu_group> node exists for --vfio.

Track and restore the original host driver during cleanup, and keep passthrough validation node-aware for guest-enabled baremetal runs where the parent platform type is baremetal.
Create an OpenVMM PCIe root complex and generated root ports before attaching VFIO passthrough devices. This matches the upstream CLI contract for --vfio port=<name> and avoids launch failures where OpenVMM cannot resolve rp0 in the topology.

Also type the PCI address helper structurally so it accepts both libvirt pool devices and OpenVMM context devices.
Create an explicit VMBus SCSI controller for OpenVMM launches and attach the OS disk and cloud-init DVD to stable LUNs. This avoids the deprecated implicit default SCSI path that left UEFI with an empty boot order in passthrough functional runs.

The generated command now uses --vmbus-scsi id=lisa_scsi0 with disk LUN 0 and DVD LUNs starting at 1.
Copilot AI review requested due to automatic review settings June 29, 2026 01:45
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@copilot fix all the check errors

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Pull request overview

This PR extends the OpenVMM SUT orchestrator to better support baremetal-hosted OpenVMM guests, including VFIO device passthrough and an alternate SSH connectivity mode via host proxying. It also tightens related platform/runner behavior and adds coverage in selftests.

Changes:

  • Add OpenVMM guest enhancements: host-proxy SSH mode (tap-only), VFIO passthrough allocation/binding/release, and updated disk attachment via a default SCSI controller.
  • Improve robustness around baremetal orchestration: iDRAC job retry/access-denied recovery, Ready platform dirty-environment reuse behavior when guests are enabled, and runner platform-type selection when guest platforms are configured.
  • Expand/adjust selftests for the new OpenVMM schema/behavior and runner/platform logic.

Reviewed changes

Copilot reviewed 19 out of 19 changed files in this pull request and generated 3 comments.

Show a summary per file
File Description
selftests/test_platform.py Updates platform selftest scaffolding and adds Ready+guest dirty-env reuse tests.
selftests/test_openvmm_schema.py Adds schema tests for guest extra_args decoding and host-proxy connection mode behavior.
selftests/test_openvmm_node.py Extends OpenVMM node tests for iptables behavior and host-proxy connection configuration.
selftests/test_openvmm_installer.py Updates installer tests for refreshed source checkout and rustup locking behavior.
selftests/test_environment.py Adds regression test ensuring guest cleanup uses a snapshot to avoid list mutation issues.
selftests/runners/test_lisa_runner.py Adds runner test coverage for guest platform type requirement merging; minor slicing tweak.
lisa/util/shell.py Adds support for rebuilding jump-box socks during SSH connect attempts; expands exception handling.
lisa/tools/openvmm.py Adds default SCSI controller and updates disk/dvd attachment command construction.
lisa/tools/cargo.py Adds rustup locking, longer timeouts, and improved cargo discovery/install flow.
lisa/sut_orchestrator/ready.py Adjusts dirty env reuse behavior when guest_enabled is true.
lisa/sut_orchestrator/openvmm/schema.py Adds connection modes, extra_args decoding, and device pool/passthrough schema fields.
lisa/sut_orchestrator/openvmm/node.py Implements host-proxy connection mode, VFIO passthrough handling, and refactors forwarding rule management.
lisa/sut_orchestrator/openvmm/installer.py Refreshes source checkout, resolves cargo path robustly, and wraps rust-src installs with rustup lock.
lisa/sut_orchestrator/openvmm/context.py Adds passthrough context structs and locking for forwarding/device-pool operations.
lisa/sut_orchestrator/baremetal/cluster/idrac.py Adds iDRAC job queue retrying and access-denied recovery for Redfish operations.
lisa/runners/lisa_runner.py Chooses an effective platform_type for checks when guest platforms are enabled.
lisa/node.py Fixes guest cleanup to avoid mutation during iteration; adds proxy jump boxes to SSH shell construction.
lisa/microsoft/testsuites/performance/networkperf_passthrough.py Enables passthrough perf suite to support OPENVMM and pulls OpenVMM node context when needed.
lisa/microsoft/testsuites/device_passthrough/functional_tests.py Extends passthrough functional suite to support OPENVMM and generalizes host device lookup logic.

Comment thread lisa/sut_orchestrator/openvmm/node.py
Comment thread lisa/tools/cargo.py Outdated
Comment thread lisa/runners/lisa_runner.py
Harden OpenVMM SSH forwarding cleanup by tracking only inserted iptables rules and serializing updates with a reentrant host lock.

Constrain forwarded SSH DNAT traffic to enter from the host default route interface and leave through the OpenVMM tap bridge.

Avoid importing libvirt at OpenVMM module import time so generic selftests and startup paths do not require the optional libvirt dependency.

Surface passthrough driver restore failures during guest cleanup so hosts are not silently reused after VFIO cleanup errors.

Update selftests for tracked forwarding cleanup, forwarded SSH rule direction, mock-platform connectivity checks, and runner message slice formatting.
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⚠️ AI Test Selection — cancelled

53 test case(s) selected (view run)

Marketplace image: microsoftcblmariner azure-linux-3 azure-linux-3 latest

Count
✅ Passed 1
❌ Failed 0
⏭️ Skipped 2
Total 3
Test case details
Test Case Status Time (s) Message
perf_nested_hyperv_storage_singledisk (lisa_0_4) ⏭️ SKIPPED 0.000 check skipped: OS type mismatch: ["requires [<class 'lisa.operating_system.Windows'>] but VM supports [<class 'lisa.oper
perf_nested_kvm_storage_singledisk (lisa_0_2) ⏭️ SKIPPED 72.533 skipped: <lisa.operating_system.CBLMariner object at 0x7f2910606600> is not supported. Currently the test could be run o
perf_epoll (lisa_0_11) ✅ PASSED 203.910

@vyadavmsft vyadavmsft force-pushed the users/vyadav/openvmm-baremetal branch from e2bb386 to 1cf3cc8 Compare June 29, 2026 01:54
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No test cases were selected for this PR.

Copilot AI review requested due to automatic review settings June 29, 2026 01:57
@vyadavmsft vyadavmsft removed the request for review from Copilot June 29, 2026 01:57

Copilot AI commented Jun 29, 2026

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@copilot fix all the check errors

Fixed the check errors in commit 2a81a94.

Updates include:

  • mypy type fix for ssh_forwarding_lock in openvmm/context.py
  • flake8 cleanup in selftests/test_platform.py
  • test isolation cleanup to unregister READY platform plugins after test execution to prevent cross-test hook leakage

Validated with:

  • python -m nox -s flake8
  • python -m mypy lisa/sut_orchestrator/openvmm/context.py
  • python -m unittest selftests.test_platform selftests.test_testsuite
  • python -m unittest discover

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⚠️ AI Test Selection — cancelled

53 test case(s) selected (view run)

Marketplace image: microsoftcblmariner azure-linux-3 azure-linux-3 latest

Count
✅ Passed 0
❌ Failed 0
⏭️ Skipped 0
Total 0
Test case details
Test Case Status Time (s) Message

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⚠️ AI Test Selection — cancelled

53 test case(s) selected (view run)

Marketplace image: microsoftcblmariner azure-linux-3 azure-linux-3 latest

Count
✅ Passed 30
❌ Failed 3
⏭️ Skipped 5
Total 38
Test case details
Test Case Status Time (s) Message
perf_epoll (lisa_0_11) ✅ PASSED 208.108
perf_messaging (lisa_0_10) ✅ PASSED 2330.979
perf_resource_disk_1024k (lisa_0_43) ✅ PASSED 1587.376
perf_ultra_datadisks_1024k (lisa_0_36) ✅ PASSED 1050.385
perf_ultra_datadisks_4k (lisa_0_35) ✅ PASSED 4365.983
perf_resource_disk_4k (lisa_0_44) ✅ PASSED 4406.557
perf_premiumv2_datadisks_1024k (lisa_0_38) ✅ PASSED 1782.516
perf_storage_generic_fio_test (lisa_0_52) ✅ PASSED 4467.093
perf_premiumv2_datadisks_4k (lisa_0_37) ✅ PASSED 4365.209
perf_nested_hyperv_storage_singledisk (lisa_0_4) ⏭️ SKIPPED 0.000 check skipped: OS type mismatch: ["requires [<class 'lisa.operating_system.Windows'>] but VM supports [<class 'lisa.oper
perf_nested_kvm_storage_singledisk (lisa_0_2) ⏭️ SKIPPED 68.030 skipped: <lisa.operating_system.CBLMariner object at 0x7fc6be380c20> is not supported. Currently the test could be run o
perf_nested_kvm_storage_multidisk (lisa_0_3) ❌ FAILED 0.000 deployment failed. LisaException: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without respo
perf_nested_hyperv_storage_multidisk (lisa_0_5) ⏭️ SKIPPED 0.000 check skipped: OS type mismatch: ["requires [<class 'lisa.operating_system.Windows'>] but VM supports [<class 'lisa.oper
perf_nested_hyperv_ntttcp_different_l1_nat (lisa_0_8) ⏭️ SKIPPED 0.000 check skipped: OS type mismatch: ["requires [<class 'lisa.operating_system.Windows'>] but VM supports [<class 'lisa.oper
perf_nested_kvm_netperf_pps_nat (lisa_0_9) ⏭️ SKIPPED 1135.116 skipped: <lisa.operating_system.CBLMariner object at 0x7fc6bf356e70> is not supported. Currently the test could be run o
perf_tcp_latency_synthetic (lisa_0_12) ✅ PASSED 133.284
perf_tcp_ntttcp_128_connections_synthetic (lisa_0_18) ✅ PASSED 72.866
perf_tcp_single_pps_sriov (lisa_0_15) ✅ PASSED 248.630
perf_tcp_latency_sriov (lisa_0_13) ✅ PASSED 144.985
perf_tcp_max_pps_sriov (lisa_0_17) ✅ PASSED 151.191
perf_tcp_single_pps_synthetic (lisa_0_14) ✅ PASSED 205.014
perf_tcp_max_pps_synthetic (lisa_0_16) ✅ PASSED 150.458
perf_udp_1k_ntttcp_sriov (lisa_0_22) ✅ PASSED 501.057
perf_tcp_ntttcp_synthetic (lisa_0_19) ✅ PASSED 418.674
perf_tcp_iperf_sriov (lisa_0_24) ✅ PASSED 177.842
perf_udp_1k_ntttcp_synthetic (lisa_0_21) ✅ PASSED 289.009
perf_tcp_ntttcp_sriov (lisa_0_20) ✅ PASSED 1209.043
perf_sockperf_latency_tcp_sriov (lisa_0_27) ✅ PASSED 14.126
perf_sockperf_latency_udp_sriov (lisa_0_28) ✅ PASSED 7.490
perf_tcp_iperf_synthetic (lisa_0_23) ✅ PASSED 179.473
perf_sockperf_latency_tcp_sriov_busy_poll (lisa_0_31) ✅ PASSED 16.691
perf_sockperf_latency_udp_sriov_busy_poll (lisa_0_32) ✅ PASSED 16.725
perf_udp_iperf_sriov (lisa_0_26) ❌ FAILED 481.772 failed. AssertionError: fail to find json format results
perf_sockperf_latency_udp_synthetic (lisa_0_29) ✅ PASSED 30.606
perf_sockperf_latency_tcp_synthetic_busy_poll (lisa_0_34) ✅ PASSED 13.121
perf_sockperf_latency_tcp_synthetic (lisa_0_30) ✅ PASSED 37.581
perf_sockperf_latency_udp_synthetic_busy_poll (lisa_0_33) ✅ PASSED 37.546
perf_udp_iperf_synthetic (lisa_0_25) ❌ FAILED 488.596 failed. AssertionError: fail to find json format results

Copilot AI review requested due to automatic review settings June 29, 2026 04:55

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Pull request overview

Copilot reviewed 19 out of 19 changed files in this pull request and generated 3 comments.

Comment thread lisa/tools/cargo.py Outdated
Comment thread lisa/tools/cargo.py Outdated
Comment thread lisa/sut_orchestrator/openvmm/node.py Outdated
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⚠️ AI Test Selection — cancelled

53 test case(s) selected (view run)

Marketplace image: microsoftcblmariner azure-linux-3 azure-linux-3 latest

Count
✅ Passed 30
❌ Failed 2
⏭️ Skipped 6
Total 38
Test case details
Test Case Status Time (s) Message
perf_resource_disk_1024k (lisa_0_43) ✅ PASSED 1615.510
perf_ultra_datadisks_1024k (lisa_0_36) ✅ PASSED 1058.356
perf_ultra_datadisks_4k (lisa_0_35) ✅ PASSED 4373.911
perf_resource_disk_4k (lisa_0_44) ✅ PASSED 4405.178
perf_premiumv2_datadisks_1024k (lisa_0_38) ✅ PASSED 1787.300
perf_storage_generic_fio_test (lisa_0_52) ✅ PASSED 4458.545
perf_premiumv2_datadisks_4k (lisa_0_37) ✅ PASSED 4372.785
perf_epoll (lisa_0_11) ✅ PASSED 220.949
perf_messaging (lisa_0_10) ✅ PASSED 2299.908
perf_nested_hyperv_storage_singledisk (lisa_0_4) ⏭️ SKIPPED 0.000 check skipped: OS type mismatch: ["requires [<class 'lisa.operating_system.Windows'>] but VM supports [<class 'lisa.oper
perf_nested_kvm_storage_singledisk (lisa_0_2) ⏭️ SKIPPED 74.779 skipped: <lisa.operating_system.CBLMariner object at 0x7f2d5b27b3e0> is not supported. Currently the test could be run o
perf_nested_hyperv_storage_multidisk (lisa_0_5) ⏭️ SKIPPED 0.000 check skipped: OS type mismatch: ["requires [<class 'lisa.operating_system.Windows'>] but VM supports [<class 'lisa.oper
perf_nested_kvm_storage_multidisk (lisa_0_3) ⏭️ SKIPPED 61.782 skipped: <lisa.operating_system.CBLMariner object at 0x7f2d68136d20> is not supported. Currently the test could be run o
perf_nested_hyperv_ntttcp_different_l1_nat (lisa_0_8) ⏭️ SKIPPED 0.000 check skipped: OS type mismatch: ["requires [<class 'lisa.operating_system.Windows'>] but VM supports [<class 'lisa.oper
perf_nested_kvm_netperf_pps_nat (lisa_0_9) ⏭️ SKIPPED 1152.855 skipped: <lisa.operating_system.CBLMariner object at 0x7f2d6824cef0> is not supported. Currently the test could be run o
perf_tcp_latency_sriov (lisa_0_13) ✅ PASSED 151.125
perf_tcp_latency_synthetic (lisa_0_12) ✅ PASSED 183.663
perf_tcp_ntttcp_128_connections_synthetic (lisa_0_18) ✅ PASSED 98.485
perf_tcp_single_pps_sriov (lisa_0_15) ✅ PASSED 214.183
perf_tcp_single_pps_synthetic (lisa_0_14) ✅ PASSED 265.895
perf_tcp_max_pps_sriov (lisa_0_17) ✅ PASSED 162.011
perf_tcp_max_pps_synthetic (lisa_0_16) ✅ PASSED 244.749
perf_tcp_ntttcp_synthetic (lisa_0_19) ✅ PASSED 751.841
perf_udp_1k_ntttcp_synthetic (lisa_0_21) ✅ PASSED 665.237
perf_tcp_iperf_synthetic (lisa_0_23) ✅ PASSED 184.429
perf_sockperf_latency_udp_synthetic (lisa_0_29) ✅ PASSED 14.777
perf_sockperf_latency_tcp_synthetic (lisa_0_30) ✅ PASSED 8.416
perf_sockperf_latency_udp_synthetic_busy_poll (lisa_0_33) ✅ PASSED 21.747
perf_sockperf_latency_tcp_synthetic_busy_poll (lisa_0_34) ✅ PASSED 21.046
perf_tcp_ntttcp_sriov (lisa_0_20) ✅ PASSED 1228.416
perf_udp_iperf_synthetic (lisa_0_25) ❌ FAILED 513.035 failed. AssertionError: fail to find json format results
perf_tcp_iperf_sriov (lisa_0_24) ✅ PASSED 214.687
perf_sockperf_latency_udp_sriov (lisa_0_28) ✅ PASSED 15.870
perf_sockperf_latency_tcp_sriov_busy_poll (lisa_0_31) ✅ PASSED 13.945
perf_udp_1k_ntttcp_sriov (lisa_0_22) ✅ PASSED 312.808
perf_sockperf_latency_udp_sriov_busy_poll (lisa_0_32) ✅ PASSED 14.465
perf_sockperf_latency_tcp_sriov (lisa_0_27) ✅ PASSED 44.265
perf_udp_iperf_sriov (lisa_0_26) ❌ FAILED 512.203 failed. AssertionError: fail to find json format results

Restore the forwarded SSH filter rule so DNAT traffic to the guest is accepted from any non-OpenVMM bridge ingress interface. The cleanup refactor accidentally tied the SSH path to the default route interface, which breaks baremetal hosts where the incoming management path is not that interface.

Keep cleanup precise by continuing to track the exact inserted rule, and update the OpenVMM node selftest to reject the default-interface-constrained rule shape.
@vyadavmsft vyadavmsft force-pushed the users/vyadav/openvmm-baremetal branch from 1a66219 to df3678c Compare June 29, 2026 19:32
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⚠️ AI Test Selection — cancelled

53 test case(s) selected (view run)

Marketplace image: microsoftcblmariner azure-linux-3 azure-linux-3 latest

Count
✅ Passed 30
❌ Failed 2
⏭️ Skipped 6
Total 38
Test case details
Test Case Status Time (s) Message
perf_nested_hyperv_storage_singledisk (lisa_0_4) ⏭️ SKIPPED 0.000 check skipped: OS type mismatch: ["requires [<class 'lisa.operating_system.Windows'>] but VM supports [<class 'lisa.oper
perf_nested_kvm_storage_singledisk (lisa_0_2) ⏭️ SKIPPED 61.549 skipped: <lisa.operating_system.CBLMariner object at 0x7f729335dbb0> is not supported. Currently the test could be run o
perf_nested_hyperv_storage_multidisk (lisa_0_5) ⏭️ SKIPPED 0.000 check skipped: OS type mismatch: ["requires [<class 'lisa.operating_system.Windows'>] but VM supports [<class 'lisa.oper
perf_nested_kvm_storage_multidisk (lisa_0_3) ⏭️ SKIPPED 46.422 skipped: <lisa.operating_system.CBLMariner object at 0x7f7291dabf50> is not supported. Currently the test could be run o
perf_nested_hyperv_ntttcp_different_l1_nat (lisa_0_8) ⏭️ SKIPPED 0.000 check skipped: OS type mismatch: ["requires [<class 'lisa.operating_system.Windows'>] but VM supports [<class 'lisa.oper
perf_nested_kvm_netperf_pps_nat (lisa_0_9) ⏭️ SKIPPED 1094.888 skipped: <lisa.operating_system.CBLMariner object at 0x7f72926d2c00> is not supported. Currently the test could be run o
perf_epoll (lisa_0_11) ✅ PASSED 217.485
perf_messaging (lisa_0_10) ✅ PASSED 2292.000
perf_resource_disk_1024k (lisa_0_43) ✅ PASSED 1588.969
perf_ultra_datadisks_1024k (lisa_0_36) ✅ PASSED 1045.992
perf_ultra_datadisks_4k (lisa_0_35) ✅ PASSED 4361.326
perf_resource_disk_4k (lisa_0_44) ✅ PASSED 4398.060
perf_premiumv2_datadisks_1024k (lisa_0_38) ✅ PASSED 1779.442
perf_storage_generic_fio_test (lisa_0_52) ✅ PASSED 4482.781
perf_premiumv2_datadisks_4k (lisa_0_37) ✅ PASSED 4360.457
perf_tcp_latency_synthetic (lisa_0_12) ✅ PASSED 120.246
perf_tcp_latency_sriov (lisa_0_13) ✅ PASSED 130.196
perf_tcp_ntttcp_128_connections_synthetic (lisa_0_18) ✅ PASSED 54.775
perf_tcp_single_pps_sriov (lisa_0_15) ✅ PASSED 220.448
perf_tcp_max_pps_synthetic (lisa_0_16) ✅ PASSED 234.672
perf_tcp_single_pps_synthetic (lisa_0_14) ✅ PASSED 236.984
perf_tcp_max_pps_sriov (lisa_0_17) ✅ PASSED 156.229
perf_tcp_ntttcp_synthetic (lisa_0_19) ✅ PASSED 400.628
perf_udp_1k_ntttcp_synthetic (lisa_0_21) ✅ PASSED 378.811
perf_tcp_iperf_synthetic (lisa_0_23) ✅ PASSED 175.649
perf_sockperf_latency_udp_synthetic (lisa_0_29) ✅ PASSED 13.486
perf_sockperf_latency_tcp_synthetic (lisa_0_30) ✅ PASSED 6.534
perf_tcp_ntttcp_sriov (lisa_0_20) ✅ PASSED 525.258
perf_sockperf_latency_udp_synthetic_busy_poll (lisa_0_33) ✅ PASSED 14.099
perf_sockperf_latency_tcp_synthetic_busy_poll (lisa_0_34) ✅ PASSED 14.173
perf_udp_iperf_synthetic (lisa_0_25) ❌ FAILED 482.550 failed. AssertionError: fail to find json format results
perf_tcp_iperf_sriov (lisa_0_24) ✅ PASSED 192.080
perf_sockperf_latency_tcp_sriov (lisa_0_27) ✅ PASSED 11.522
perf_sockperf_latency_udp_sriov (lisa_0_28) ✅ PASSED 6.491
perf_sockperf_latency_tcp_sriov_busy_poll (lisa_0_31) ✅ PASSED 10.069
perf_sockperf_latency_udp_sriov_busy_poll (lisa_0_32) ✅ PASSED 10.007
perf_udp_1k_ntttcp_sriov (lisa_0_22) ✅ PASSED 536.677
perf_udp_iperf_sriov (lisa_0_26) ❌ FAILED 598.762 failed. AssertionError: fail to find json format results

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3 participants