What's the difference between this version and v4?
On Tue, May 7, 2024 at 7:44 PM Nicholas Pratte <npra...@iol.unh.edu> wrote: > > In order to prevent accidental misconfiguration of hugepages at runtime, > the following changes are made to only allow for configuration of 2MB > hugepages within the DTS config.yaml. In the previous implementation, a > default hugepage size was selected via the size listed in /proc/meminfo. > The problem with this implementation is that, assuming the end-user has > made prior modifications to the system, /proc/meminfo may default to > hugepage sizes that are not recommended to be configured at runtime > (i.e. 1GB hugepages). This can lead to two problems: overallocation of > hugepages (which may crash the remote host) configuration of hugepages > sizes that are not recommended during runtime. In this new implementation, > we stipulate that any runtime hugepage configuration size that is not 2MB > is considered an outlier. If the end-user would like to configure either > 1GB hugepages or any unique hugepage size outside of 2MB, then they should > make these configurations either at startup (in the case of 1GB hugepages) > or runtime outside of DTS configuration (if a user would like hugepages > that are not 2MB). In either case, the expectation is that, if wish to > use hugepage sizes that are not 2MB, you will make these changes outside > and prior to the initialization of DTS. > > The end-user has two options: remove the option for hugepage > configuration in the conf.yaml, or keep the option and specify the > amount of 2MB hugepages desired. In the case of the former, then we assume > that hugepages are already configured prior to DTS initialization. In > the latter case, the user must define the amount of 2MB hugepages to be > configured at runtime. If the amount of 2MB hugepages requested exceeds > the amount of 2MB hugepages already configured on the system, then the > system will remount hugepages to cover the difference. If the amount of > hugepages requested is either greater than or equal to the amount > already configured on the system, then nothing is done. > > Nicholas Pratte (2): > dts: Change hugepage runtime config to 2MB Exclusively > dts: Change hugepage 'amount' to a different term > > doc/guides/tools/dts.rst | 6 ++++- > dts/conf.yaml | 8 +++--- > dts/framework/config/__init__.py | 8 +++--- > dts/framework/config/conf_yaml_schema.json | 12 ++++----- > dts/framework/config/types.py | 4 +-- > dts/framework/testbed_model/linux_session.py | 28 +++++++++++--------- > dts/framework/testbed_model/node.py | 4 ++- > dts/framework/testbed_model/os_session.py | 7 ++++- > 8 files changed, 45 insertions(+), 32 deletions(-) > > -- > 2.44.0 >
