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Xiaochen Shen
620f4c5c88
Intel RDT sub-features can be selectively disabled or enabled by kernel command line. See "rdt=" option details in kernel document: https://www.kernel.org/doc/Documentation/admin-guide/kernel-parameters.txt But Cache Monitoring Technology (CMT) feature is not correctly checked in init() and getCMTNumaNodeStats() now. If CMT is disabled by kernel command line (e.g., rdt=!cmt,mbmtotal,mbmlocal,l3cat,mba) while hardware supports CMT, we may get following error when getting Intel RDT stats: runc run c1 runc events c1 ERRO[0005] container_linux.go:200: getting container's Intel RDT stats caused: open /sys/fs/resctrl/c1/mon_data/mon_L3_00/llc_occupancy: no such file or directory Fix CMT feature check in init() and GetStats() call paths. Signed-off-by: Xiaochen Shen <xiaochen.shen@intel.com>
25 lines
444 B
Go
25 lines
444 B
Go
package intelrdt
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var (
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cmtEnabled bool
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)
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// Check if Intel RDT/CMT is enabled.
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func IsCMTEnabled() bool {
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return cmtEnabled
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}
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func getCMTNumaNodeStats(numaPath string) (*CMTNumaNodeStats, error) {
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stats := &CMTNumaNodeStats{}
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if enabledMonFeatures.llcOccupancy {
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llcOccupancy, err := getIntelRdtParamUint(numaPath, "llc_occupancy")
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if err != nil {
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return nil, err
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}
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stats.LLCOccupancy = llcOccupancy
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}
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return stats, nil
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}
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