Date: Wed, 9 May 2012 15:16:19 +1000 From: Peter Jeremy <peter@rulingia.com> To: freebsd-current@freebsd.org Cc: Fabien Thomas <fabient@freebsd.org> Subject: panic: incorrect npmc count Message-ID: <20120509051619.GA60571@server.rulingia.com>
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--PNTmBPCT7hxwcZjr Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable [This may be a duplicate because I forgot to update my subscription after changing address but I've also corrected a typo] (I've copied fabient@ because r233628 appears to have been the last commit in this area). I've just updated a P4 test box from r232545 to r235127 and it now panics during boot: panic: [intel,202] incorrect npmc count 35 Looking at sys/dev/hwpmc/hmpmc_intel.c line 202, the expected npmc count is 19. When I look at the actual code in pmc_intel_initialize(): pmc_mdep_alloc() initialises pmd_npmc to zero and then increments it by SOFT_NPMCS (16) in pmc_soft_initialize(). pmc_tsc_initialize() then increments it by TSC_NPMCS (1) pmc_p4_initialize() then increments it by P4_NPMCS (18) This totals 35 (as per the panic message). Can someone explain the KASSERT() that expects 19 - it boils down to KASSERT(0+16+1+18 =3D=3D 1+18, ...) I gather not many people are running -current on a P4. --=20 Peter Jeremy --PNTmBPCT7hxwcZjr Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (FreeBSD) iEYEARECAAYFAk+p/aMACgkQ/opHv/APuIe61ACeNk/cXQQ6zZnTQ6poZEbD66+n ELUAmgNwk5P8Vsk6KgpjpBBHqZzBi/9T =EUZQ -----END PGP SIGNATURE----- --PNTmBPCT7hxwcZjr--
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