Date: Wed, 20 Jan 2021 14:24:59 +0000 From: Santiago Martinez <sm@codenetworks.net> To: Mark Johnston <markj@freebsd.org> Cc: FreeBSD Current <current@freebsd.org> Subject: Re: VM UMA counters. Message-ID: <af6826c6-d1d6-4f9c-19dd-8aa8eb070f66@codenetworks.net> In-Reply-To: <YAg7fYcLdoLfFqaI@raichu> References: <0996195a-6d7f-b058-e95c-b2446688940f@codenetworks.net> <YAg7fYcLdoLfFqaI@raichu>
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This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --wLJrgnzXsGxIObZ6XKZ6u4FUHXC4LrPv4 Content-Type: multipart/mixed; boundary="ibvo0trIwLDH5ENDDYf0mrB1y47r3bhbf"; protected-headers="v1" From: Santiago Martinez <sm@codenetworks.net> To: Mark Johnston <markj@freebsd.org> Cc: FreeBSD Current <current@freebsd.org> Message-ID: <af6826c6-d1d6-4f9c-19dd-8aa8eb070f66@codenetworks.net> Subject: Re: VM UMA counters. References: <0996195a-6d7f-b058-e95c-b2446688940f@codenetworks.net> <YAg7fYcLdoLfFqaI@raichu> In-Reply-To: <YAg7fYcLdoLfFqaI@raichu> --ibvo0trIwLDH5ENDDYf0mrB1y47r3bhbf Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Content-Language: en-US Hi Mark, To the DRM question, indeed I am using drm-devel with amdgpu. Here is the vmstat -s output. Cheers Santiago root@tucho:/home/smartinez # vmstat -s 1882578 cpu context switches 100445 device interrupts 23777 software interrupts 1054356 traps 13811750 system calls 39 kernel threads created 1398=C2=A0 fork() calls 343 vfork() calls 84 rfork() calls 0 swap pager pageins 0 swap pager pages paged in 0 swap pager pageouts 0 swap pager pages paged out 12579 vnode pager pageins 138821 vnode pager pages paged in 4 vnode pager pageouts 37 vnode pager pages paged out 0 page daemon wakeups 160056 pages examined by the page daemon 0 clean page reclamation shortfalls 0 pages reactivated by the page daemon 194549 copy-on-write faults 190 copy-on-write optimized faults 697804 zero fill pages zeroed 0 zero fill pages prezeroed 2559 intransit blocking page faults 1018606 total VM faults taken 12262 page faults requiring I/O 0 pages affected by kernel thread creation 138718 pages affected by=C2=A0 fork() 12177 pages affected by vfork() 14704 pages affected by rfork() 746501 pages freed 0 pages freed by daemon 338813 pages freed by exiting processes 418069 pages active 200941 pages inactive 1123 pages in the laundry queue 513309 pages wired down 32 virtual user pages wired down 7003759 pages free 4096 bytes per page 4311229 total name lookups cache hits (94% pos + 2% neg) system 0% per-directory deletions 0%, falsehits 0%, toolong 0% On 1/20/21 2:17 PM, Mark Johnston wrote: > On Tue, Jan 19, 2021 at 12:44:14PM +0000, Santiago Martinez wrote: >> Hi there, sorry to ask this as it might be a silly question... >> >> Since a few weeks im seeing random locks on application and sometimes >> when using truss it show resource temporally unavailable. >> >> Now, checking random things, i see that the >> vm.uma.256_Bucket.stats.fails counter is increasing while the other ar= e >> not (at least for now). >> >> Here goes the output: >> >> vm.uma.256_Bucket.stats.xdomain: 0 >> vm.uma.256_Bucket.stats.fails: 762142 >> vm.uma.256_Bucket.stats.frees: 41935 >> vm.uma.256_Bucket.stats.allocs: 42721 >> vm.uma.256_Bucket.stats.current: 786 >> >> root@tucho:/home/smartinez # uname -a >> FreeBSD tucho 13.0-ALPHA1 FreeBSD 13.0-ALPHA1 #13 >> main-c256107-g7d3310c4fcdd: Tue Jan 19 10:50:12 GMT 2021=C2=A0=C2=A0=C2= =A0=C2=A0 >> smartinez@tucho:/usr/obj/usr/src/amd64.amd64/sys/GENERIC-NODEBUG=C2=A0= amd64 >> >> My question is, is this the expected behavior? > There are situations where bucket allocations must fail to avoid > recursing back into the VM. For instance, allocation of a UMA slab may= > require allocation of a radix node entry from UMA, which may attempt > allocation of a bucket, which could trigger allocation of a slab. > > It's therefore normal to see a non-zero number of failures after > booting, but after that the bucket zone's caches are populated and > failures should become rare. Failures might also be triggered during > severe memory shortages. Could you show vmstat -s from an affected > system? Are you using any DRM graphics drivers by any chance? > _______________________________________________ > freebsd-current@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.o= rg" --ibvo0trIwLDH5ENDDYf0mrB1y47r3bhbf-- --wLJrgnzXsGxIObZ6XKZ6u4FUHXC4LrPv4 Content-Type: application/pgp-signature; name="OpenPGP_signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="OpenPGP_signature" -----BEGIN PGP SIGNATURE----- wsF5BAABCAAjFiEEk06QWJzNAs9NTrFjWBFqYkyC55EFAmAIPTsFAwAAAAAACgkQWBFqYkyC55Fb mA//UD0w4Jo4TIkbeXN0vkT3nC8XonNSGfeoAdE7PaUBV/MJQYDBKAY/g4aHAH1J/SX3BCRMN7J0 v9r+Uhpbpr2DR/o4EqCyhGIzU/8CO97FDPqNgMJln4jnDHUsYeTDmLnwCJ9FWUPckqaAGlUf7xAk bnswFHcKjhCp0rdLwBxCjWnJsrIC3+RY1DRaOQ9pi5ceWvOvYLf+SlfHuTi6HmEwT4tjsVBdDdDS 0J9BIlyMgVR7p5EOCx7DfOl8jA1oY10zqaj2zQcOZ+3KpY1vBNj57iMOuDF+H+N1+uSHkuiyhsnS 5wrd5MfKQisZIqYbfbVki/6dZBqyxhs5gErfiUq3SKNV48XI2Esz42CWc5EmZ1rO0PoJM7guE2JY NMy0EVLGTwIsPwF/MqQ67Ka3oOsyXz+K3Vz7KvYRWuM/SrVLvEcNjHMU/fYoghPg6gPjY/+YMqfm oV5F85a/WR9ZXVWpIIOJuSbSjjgv+Udx9merXEwkM0sQkD9xBBna1xbpc63bdziY1EVOp6o/jqS7 h7mQXpeUme7lji3ee9FDE2QQOPPrNnKa+ozdbvWjS1AbD/2y2OW3GcKEodCUCqMgfn5BBes1PCig XuJ0CstmKgBA2vEcZZDWUOgRQREVmdq1N7+ZULyDWZxpWSc23GhkH03H7QAOAVO7X5fGQ9KPeKOz CIQ= =wzNt -----END PGP SIGNATURE----- --wLJrgnzXsGxIObZ6XKZ6u4FUHXC4LrPv4--
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