Date: Sun, 7 May 2023 22:18:22 +0200 From: Yuri <yuri@aetern.org> To: Cheng Cui <cc@freebsd.org>, freebsd-net@freebsd.org Subject: Re: missing hw.em.msix support in FreeBSD 14.0-CURRENT? Message-ID: <e7deb146-3e3a-2cc8-45e9-2003242a1293@aetern.org> In-Reply-To: <CAGaXuiKNLjWRE=a15k_qU2K-pcHoPfT9rrfLjCqstCaFb7kwbw@mail.gmail.com> References: <CAGaXuiKNLjWRE=a15k_qU2K-pcHoPfT9rrfLjCqstCaFb7kwbw@mail.gmail.com>
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Cheng Cui wrote: > Hello, > > I am using this em(4) driver for some tests. According to the man page > below, there should be a "hw.em.msix" sysctl to enable/disable MSI-X > style interrupts. But why is it missing in my system below? > https://man.freebsd.org/cgi/man.cgi?em(4) > <https://man.freebsd.org/cgi/man.cgi?em(4)>; > > root@s1:~ # dmesg | egrep "8254" > Timecounter "i8254" frequency 1193182 Hz quality 0 > Event timer "i8254" frequency 1193182 Hz quality 100 > em0: <Intel(R) Legacy PRO/1000 MT 82541GI> port 0xdcc0-0xdcff mem > 0xdfae0000-0xdfafffff irq 64 at device 7.0 on pci6 > em1: <Intel(R) Legacy PRO/1000 MT 82541GI> port 0xccc0-0xccff mem > 0xdf8e0000-0xdf8fffff irq 65 at device 8.0 on pci7 > em2: <Intel(R) Legacy PRO/1000 MT 82546EB (Copper)> port 0xbcc0-0xbcff > mem 0xdf5e0000-0xdf5fffff irq 106 at device 4.0 on pci9 > em3: <Intel(R) Legacy PRO/1000 MT 82546EB (Copper)> port 0xbc80-0xbcbf > mem 0xdf5c0000-0xdf5dffff irq 107 at device 4.1 on pci9 > em4: <Intel(R) Legacy PRO/1000 MT 82546EB (Copper)> port 0xacc0-0xacff > mem 0xdf3e0000-0xdf3fffff irq 101 at device 3.0 on pci10 > em5: <Intel(R) Legacy PRO/1000 MT 82546EB (Copper)> port 0xac80-0xacbf > mem 0xdf3c0000-0xdf3dffff irq 102 at device 3.1 on pci10 > > root@s1:~ # ifconfig em5 > em5: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 > options=481009b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,VLAN_HWFILTER,NOMAP> > ether 00:04:23:b7:1e:1d > inet 10.1.1.2 netmask 0xffffff00 broadcast 10.1.1.255 > media: Ethernet 1000baseT <full-duplex> > status: active > nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> > > root@s1:~ # sysctl hw.em > hw.em.max_interrupt_rate: 8000 > hw.em.eee_setting: 1 > hw.em.rx_process_limit: 100 > hw.em.sbp: 0 > hw.em.smart_pwr_down: 0 > hw.em.rx_abs_int_delay: 66 > hw.em.tx_abs_int_delay: 66 > hw.em.rx_int_delay: 0 > hw.em.tx_int_delay: 66 > hw.em.disable_crc_stripping: 0 > root@s1:~ # As if_em was converted to iflib, I guess the related sysctl would now be dev.em.0.iflib.disable_msix (I could be wrong, don't have h/w to check).
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