Juerg Haefliger
94f464fdee
BugLink: https://bugs.launchpad.net/bugs/2089411 linux-tools from older kernels without these patches provide the perf python library in a different/broken path, so we have to look there as well. Sigh. Signed-off-by: Juerg Haefliger <juerg.haefliger@canonical.com> Acked-by: Kevin Becker <kevin.becker@canonical.com> Acked-by: Agathe Porte <agathe.porte@canonical.com> Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
35 lines
1.2 KiB
Python
35 lines
1.2 KiB
Python
import os
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import importlib.util
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from glob import glob
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class KernelNotFoundError(Exception):
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def __init__(self):
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kernel_version = os.uname().release
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flavor = kernel_version.split("-", 2)[2]
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super().__init__(
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f"\nWARNING: python perf module not found for kernel {kernel_version}\n\n"
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f" You may need to install the following package for this specific kernel:\n"
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f" linux-tools-{kernel_version}\n\n"
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f" You may also want to install the following package to keep up to date:\n"
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f" linux-tools-{flavor}"
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)
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# Load the actual python-perf module for the running kernel
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_kernel_version = os.uname().release
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_perf_dir = f"/usr/lib/linux-tools/{_kernel_version}/lib"
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if not os.path.exists(_perf_dir):
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_abi_version = "-".join(_kernel_version.split("-")[0:2])
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_perf_dir = f"/usr/lib/python3/dist-packages/linux-tools-{_abi_version}"
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if not os.path.exists(_perf_dir):
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raise KernelNotFoundError()
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_perf_lib = glob(os.path.join(_perf_dir, "perf.*.so"))[-1]
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_spec = importlib.util.spec_from_file_location("perf", _perf_lib)
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_perf = importlib.util.module_from_spec(_spec)
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_spec.loader.exec_module(_perf)
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# Expose the 'perf' module.
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__all__ = ["perf"]
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