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Turn off sampling modes on the AMD64 till the time I can track down

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the reason for the double fault seen when sampling under load.

MFC after:	3 days
This commit is contained in:
Joseph Koshy 2005-08-22 02:59:51 +00:00
parent fa949fc86d
commit d4d6be499f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=149360
1 changed files with 5 additions and 0 deletions
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5
sys/dev/hwpmc/hwpmc_amd.c
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@ -474,6 +474,11 @@ amd_allocate_pmc(int cpu, int ri, struct pmc *pm,
return 0;
}
#if __amd64__
if (pd->pd_caps & PMC_CAP_INTERRUPT)
return EOPNOTSUPP; /* XXX avoid a processor double fault */
#endif
#if DEBUG
KASSERT(pd->pd_class == amd_pmc_class,
("[amd,%d] Unknown PMC class (%d)", __LINE__, pd->pd_class));