Date: Thu, 11 Jul 2013 09:44:21 +0200 From: Andre Oppermann <andre@freebsd.org> To: Alfred Perlstein <alfred@ixsystems.com> Cc: stable@freebsd.org, re@freebsd.org, nonesuch@longcount.org Subject: Re: status of autotuning freebsd for 9.2 Message-ID: <51DE6255.5000304@freebsd.org> In-Reply-To: <51DACE93.9050608@freebsd.org> References: <51D90B9B.9080209@ixsystems.com> <51D92826.1070707@freebsd.org> <51D9B24B.8070303@ixsystems.com> <51DACE93.9050608@freebsd.org>
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On 08.07.2013 16:37, Andre Oppermann wrote: > On 07.07.2013 20:24, Alfred Perlstein wrote: >> On 7/7/13 1:34 AM, Andre Oppermann wrote: >>> Can you help me with with testing? >>> >> Yes. Please give me your proposed changes and I'll stand up a machine and give feedback. > > http://people.freebsd.org/~andre/mfc-autotuning-20130708.diff Any feedback from testers on this? The MFC window is closing soon. -- Andre > This is functional bundle MFC of these original commits: > > MFC r242029 (alfred): > > Allow autotune maxusers > 384 on 64 bit machines. > > MFC r242847 (alfred): > > Allow maxusers to scale on machines with large address space. > > MFC r243631 (andre): > > Base the mbuf related limits on the available physical memory or > kernel memory, whichever is lower. The overall mbuf related memory > limit must be set so that mbufs (and clusters of various sizes) > can't exhaust physical RAM or KVM. > > At the same time divorce maxfiles from maxusers and set maxfiles to > physpages / 8 with a floor based on maxusers. This way busy servers > can make use of the significantly increased mbuf limits with a much > larger number of open sockets. > > MFC r243639 (andre): > > Complete r243631 by applying the remainder of kern_mbuf.c that got > lost while merging into the commit tree. > > MFC r243668 (andre): > > Using a long is the wrong type to represent the realmem and maxmbufmem > variable as they may overflow on i386/PAE and i386 with > 2GB RAM. > > MFC r243995, r243996, r243997 (pjd): > > Style cleanups, Make use of the fact that uma_zone_set_max(9) already > returns actual limit set. > > MFC r244080 (andre): > > Prevent long type overflow of realmem calculation on ILP32 by forcing > calculation to be in quad_t space. Fix style issue with second parameter > to qmin(). > > MFC r245469 (alfred): > > Do not autotune ncallout to be greater than 18508. > > MFC r245575 (andre): > > Move the mbuf memory limit calculations from init_param2() to > tunable_mbinit() where it is next to where it is used later. > > MFC r246207 (andre): > > Remove unused VM_MAX_AUTOTUNE_NMBCLUSTERS define. > > MFC r249843 (andre): > > Base the calculation of maxmbufmem in part on kmem_map size > instead of kernel_map size to prevent kernel memory exhaustion > by mbufs and a subsequent panic on physical page allocation > failure. > >
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