Date: Fri, 25 May 2018 09:40:00 -0700 From: Matthew Macy <mmacy@freebsd.org> To: Mark Johnston <markj@freebsd.org> Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r334118 - in head/sys: compat/linprocfs compat/linux compat/linuxkpi/common/include/linux dev/mlx5/mlx5_ib dev/wtap net net/altq netinet netinet/netdump netinet6 netpfil/pf nfs ofed/dri... Message-ID: <CAPrugNr=1udpCOdmZp8U9eecOU1M-LBYb4w1LpSZ8vz3dTjMZg@mail.gmail.com> In-Reply-To: <20180525163604.GA40082@raichu> References: <201805232102.w4NL2FaJ073854@repo.freebsd.org> <20180525163604.GA40082@raichu>
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Odd. I tested the same thing as did pho with regular interfaces. Will fix asap. On Fri, May 25, 2018 at 09:36 Mark Johnston <markj@freebsd.org> wrote: > On Wed, May 23, 2018 at 09:02:15PM +0000, Matt Macy wrote: > > Author: mmacy > > Date: Wed May 23 21:02:14 2018 > > New Revision: 334118 > > URL: https://svnweb.freebsd.org/changeset/base/334118 > > > > Log: > > UDP: further performance improvements on tx > > > > Cumulative throughput while running 64 > > netperf -H $DUT -t UDP_STREAM -- -m 1 > > on a 2x8x2 SKL went from 1.1Mpps to 2.5Mpps > > > > Single stream throughput increases from 910kpps to 1.18Mpps > > > > Baseline: > > https://people.freebsd.org/~mmacy/2018.05.11/udpsender2.svg > > > > - Protect read access to global ifnet list with epoch > > https://people.freebsd.org/~mmacy/2018.05.11/udpsender3.svg > > > > - Protect short lived ifaddr references with epoch > > https://people.freebsd.org/~mmacy/2018.05.11/udpsender4.svg > > > > - Convert if_afdata read lock path to epoch > > https://people.freebsd.org/~mmacy/2018.05.11/udpsender5.svg > > After this change I can panic an INVARIANTS kernel like so. There is a > freed ifaddr lingering on the lo0 ifnet's address list. > > # ifconfig lo0 127.0.0.2 > # ifconfig lo0 -alias 127.0.0.2 > # netstat -rn > Routing tables > > > Fatal trap 9: general protection fault while in kernel mode > cpuid = 1; apic id = 01 > instruction pointer = 0x20:0xffffffff80605219 > stack pointer = 0x28:0xfffffe00004692e0 > frame pointer = 0x28:0xfffffe00004693d0 > code segment = base 0x0, limit 0xfffff, type 0x1b > = DPL 0, pres 1, long 1, def32 0, gran 1 > processor eflags = interrupt enabled, resume, IOPL = 0 > current process = 735 (netstat) > trap number = 9 > panic: general protection fault > cpuid = 1 > time = 1527266002 > Uptime: 1m42s > Dumping 216 out of 4079 > MB:..8%..15%..23%..37%..45%..52%..67%..74%..82%..97% > Dump complete > Consoles: userboot >
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