Turn off sampling modes on the AMD64 till the time I can track down
the reason for the double fault seen when sampling under load. MFC after: 3 days
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=149360
@ -474,6 +474,11 @@ amd_allocate_pmc(int cpu, int ri, struct pmc *pm,
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return 0;
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}
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#if __amd64__
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if (pd->pd_caps & PMC_CAP_INTERRUPT)
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return EOPNOTSUPP; /* XXX avoid a processor double fault */
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#endif
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#if DEBUG
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KASSERT(pd->pd_class == amd_pmc_class,
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("[amd,%d] Unknown PMC class (%d)", __LINE__, pd->pd_class));
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