Gargaditya/dynamic memory testsuite #4195
Conversation
adityagarg0911
commented
Jan 6, 2026
adityagarg0911
commented
- Add Testsuite for Dynamic Memory tests on a Linux VM over HyperV
- Add option to enable Dynamic Memory while provisioning VM over hyperV
- Add Hugepages memory stress in stres-ng tool
- Add TestLimit tool to put Memory pressure on windows host
|
|
||
| def _get_host_pressure_mb(self, ctx: DynamicMemoryTestContext) -> int: | ||
| host_total_memory_mb = ctx.hyperv.get_host_total_memory_mb() | ||
| return math.ceil(host_total_memory_mb / 45) |
There was a problem hiding this comment.
add comments for the value 45
| ) | ||
|
|
||
| def _read_kernel_config(self, node: Node, kernel_version: str, config: str) -> bool: | ||
| config_path = f"/boot/config-{kernel_version}" |
There was a problem hiding this comment.
try to use tool kernelconfig
| ).is_less_than_or_equal_to(ctx.host_guest_tolerance_mb) | ||
|
|
||
| def _read_meminfo_value(self, node: Node, key: str) -> int: | ||
| content = node.execute("cat /proc/meminfo", sudo=False).stdout |
There was a problem hiding this comment.
This function has been called 4 times to get value of "AnonHugePages", and 1 time get value of "MemTotal".
I think I can get total memory from Free tool but for AnonHugePages this function has to stay.
Should I use Free tool to get total memory or keep it as is?
| def _ensure_debugfs_mounted(self, node: Node) -> None: | ||
| if not self._check_debugfs_mounted(node): | ||
| node.execute( | ||
| "mount -t debugfs debugfs /sys/kernel/debug", |
There was a problem hiding this comment.
can we leverage the mount tool?
There was a problem hiding this comment.
Yes, I think we can
Will do this
There was a problem hiding this comment.
Pull request overview
This pull request introduces a comprehensive Dynamic Memory test suite for Linux VMs running on Hyper-V, along with the necessary infrastructure changes to support dynamic memory provisioning and testing. The changes add the ability to configure and validate Hyper-V's dynamic memory feature, which allows VMs to dynamically adjust their memory allocation based on demand.
Key changes:
- Adds a new test suite with 7 test cases validating dynamic memory hot add, balloon up/down, and memory limit behaviors
- Implements dynamic memory configuration support in the Hyper-V orchestrator for VM provisioning
- Adds TestLimit tool for applying memory pressure on Windows hosts
Reviewed changes
Copilot reviewed 8 out of 8 changed files in this pull request and generated 16 comments.
Show a summary per file
| File | Description |
|---|---|
| lisa/microsoft/testsuites/hyperv/dynamic_memory.py | New test suite with 7 test cases validating dynamic memory hot add, ballooning, and limit enforcement under various stress conditions |
| lisa/tools/hyperv.py | Adds dynamic memory configuration dataclass, VM creation parameters for dynamic memory, and helper methods to retrieve memory information from host and guest |
| lisa/tools/testlimit.py | New tool that downloads and runs Sysinternals TestLimit to apply memory pressure on Windows hosts |
| lisa/tools/stress_ng.py | Adds async hugepage memory stressor method for testing huge page allocation scenarios |
| lisa/sut_orchestrator/hyperv/schema.py | Adds schema for dynamic memory configuration parameters (min, max, startup, buffer, priority) |
| lisa/sut_orchestrator/hyperv/platform_.py | Integrates dynamic memory schema into VM provisioning flow, passing parameters to HyperV.create_vm |
| lisa/tools/unzip.py | Updates imports from relative to absolute imports for better code organization |
| lisa/tools/init.py | Exports TestLimit tool for external use |
Test Suggestions (Required per Guideline 1000000):
Key Test Cases:
verify_dynamic_memory_hot_add|verify_dynamic_memory_hot_add_hugepages|verify_dynamic_memory_upper_limit|verify_dynamic_memory_balloon_up|verify_dynamic_memory_balloon_down
Impacted LISA Features:
Resize, StartStop, SerialConsole
Tested Azure Marketplace Images:
- canonical 0001-com-ubuntu-server-jammy 22_04-lts-gen2 latest
- redhat rhel 9_5 latest
- debian debian-12 12-gen2 latest
