Date: Sun, 7 May 2023 19:28:34 -0400 From: Cheng Cui <cc@freebsd.org> To: Yuri <yuri@aetern.org> Cc: freebsd-net@freebsd.org Subject: Re: missing hw.em.msix support in FreeBSD 14.0-CURRENT? Message-ID: <CAGaXuiKsB8YUh_bvewXwkUm2piHLr60PjgQzyek0FQ2OceF_tA@mail.gmail.com> In-Reply-To: <e7deb146-3e3a-2cc8-45e9-2003242a1293@aetern.org> References: <CAGaXuiKNLjWRE=a15k_qU2K-pcHoPfT9rrfLjCqstCaFb7kwbw@mail.gmail.com> <e7deb146-3e3a-2cc8-45e9-2003242a1293@aetern.org>
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--0000000000003723e605fb22e2d3 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Yuri, Thanks for the update. I am using an Emulab testbed node under the same type of hardware. Below are the new outputs. It is supposed to have multiple tx/rx queues under msix. Why are there only rxq0/txq0? Is it because the CPU has only one core? How can I check if RSS is supported? root@s1:~ # sysctl -d dev.em.0.iflib.disable_msix dev.em.0.iflib.disable_msix: disable MSI-X (default 0) root@s1:~ # sysctl dev.em.0.iflib.disable_msix dev.em.0.iflib.disable_msix: 0 root@s1:~ # sysctl dev.em.0.iflib dev.em.0.iflib.rxq0.rxq_fl0.buf_size: 2048 dev.em.0.iflib.rxq0.rxq_fl0.credits: 1023 dev.em.0.iflib.rxq0.rxq_fl0.cidx: 959 dev.em.0.iflib.rxq0.rxq_fl0.pidx: 958 dev.em.0.iflib.rxq0.cpu: 1 dev.em.0.iflib.txq0.r_abdications: 0 dev.em.0.iflib.txq0.r_restarts: 0 dev.em.0.iflib.txq0.r_stalls: 0 dev.em.0.iflib.txq0.r_starts: 110443 dev.em.0.iflib.txq0.r_drops: 0 dev.em.0.iflib.txq0.r_enqueues: 110444 dev.em.0.iflib.txq0.ring_state: pidx_head: 1903 pidx_tail: 1903 cidx: 1903 state: IDLE dev.em.0.iflib.txq0.txq_cleaned: 115208 dev.em.0.iflib.txq0.txq_processed: 115251 dev.em.0.iflib.txq0.txq_in_use: 42 dev.em.0.iflib.txq0.txq_cidx_processed: 565 dev.em.0.iflib.txq0.txq_cidx: 525 dev.em.0.iflib.txq0.txq_pidx: 568 dev.em.0.iflib.txq0.no_tx_dma_setup: 0 dev.em.0.iflib.txq0.txd_encap_efbig: 0 dev.em.0.iflib.txq0.tx_map_failed: 0 dev.em.0.iflib.txq0.no_desc_avail: 0 dev.em.0.iflib.txq0.mbuf_defrag_failed: 0 dev.em.0.iflib.txq0.m_pullups: 0 dev.em.0.iflib.txq0.mbuf_defrag: 0 dev.em.0.iflib.txq0.cpu: 0 dev.em.0.iflib.override_nrxds: 0 dev.em.0.iflib.override_ntxds: 0 dev.em.0.iflib.use_logical_cores: 0 dev.em.0.iflib.separate_txrx: 0 dev.em.0.iflib.core_offset: 0 dev.em.0.iflib.tx_abdicate: 0 dev.em.0.iflib.rx_budget: 0 dev.em.0.iflib.disable_msix: 0 dev.em.0.iflib.override_qs_enable: 0 dev.em.0.iflib.override_nrxqs: 0 dev.em.0.iflib.override_ntxqs: 0 dev.em.0.iflib.driver_version: 7.7.8-fbsd root@s1:~ # Best Regards, Cheng Cui On Sun, May 7, 2023 at 4:18=E2=80=AFPM Yuri <yuri@aetern.org> wrote: > 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=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu = 1500 > > > options=3D481009b<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=3D29<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). > --0000000000003723e605fb22e2d3 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr"><div>Hi Yuri,</div><div><br></div><div>Thanks for the=C2= =A0update. I am using an Emulab testbed node under the same type of hardwar= e. Below are the new outputs.<br></div><div>It is supposed to have multiple= tx/rx queues under msix. Why are there only rxq0/txq0? Is it because the C= PU has only one core? How can I check if RSS is supported?<br></div><div><b= r></div><div>root@s1:~ # sysctl -d dev.em.0.iflib.disable_msix<br>dev.em.0.= iflib.disable_msix: disable MSI-X (default 0)<br>root@s1:~ # sysctl dev.em.= 0.iflib.disable_msix<br>dev.em.0.iflib.disable_msix: 0<br>root@s1:~ # sysct= l dev.em.0.iflib<br>dev.em.0.iflib.rxq0.rxq_fl0.buf_size: 2048<br>dev.em.0.= iflib.rxq0.rxq_fl0.credits: 1023<br>dev.em.0.iflib.rxq0.rxq_fl0.cidx: 959<b= r>dev.em.0.iflib.rxq0.rxq_fl0.pidx: 958<br>dev.em.0.iflib.rxq0.cpu: 1<br>de= v.em.0.iflib.txq0.r_abdications: 0<br>dev.em.0.iflib.txq0.r_restarts: 0<br>= dev.em.0.iflib.txq0.r_stalls: 0<br>dev.em.0.iflib.txq0.r_starts: 110443<br>= dev.em.0.iflib.txq0.r_drops: 0<br>dev.em.0.iflib.txq0.r_enqueues: 110444<br= >dev.em.0.iflib.txq0.ring_state: pidx_head: 1903 pidx_tail: 1903 cidx: 1903= state: IDLE<br>dev.em.0.iflib.txq0.txq_cleaned: 115208<br>dev.em.0.iflib.t= xq0.txq_processed: 115251<br>dev.em.0.iflib.txq0.txq_in_use: 42<br>dev.em.0= .iflib.txq0.txq_cidx_processed: 565<br>dev.em.0.iflib.txq0.txq_cidx: 525<br= >dev.em.0.iflib.txq0.txq_pidx: 568<br>dev.em.0.iflib.txq0.no_tx_dma_setup: = 0<br>dev.em.0.iflib.txq0.txd_encap_efbig: 0<br>dev.em.0.iflib.txq0.tx_map_f= ailed: 0<br>dev.em.0.iflib.txq0.no_desc_avail: 0<br>dev.em.0.iflib.txq0.mbu= f_defrag_failed: 0<br>dev.em.0.iflib.txq0.m_pullups: 0<br>dev.em.0.iflib.tx= q0.mbuf_defrag: 0<br>dev.em.0.iflib.txq0.cpu: 0<br>dev.em.0.iflib.override_= nrxds: 0<br>dev.em.0.iflib.override_ntxds: 0<br>dev.em.0.iflib.use_logical_= cores: 0<br>dev.em.0.iflib.separate_txrx: 0<br>dev.em.0.iflib.core_offset: = 0<br>dev.em.0.iflib.tx_abdicate: 0<br>dev.em.0.iflib.rx_budget: 0<br>dev.em= .0.iflib.disable_msix: 0<br>dev.em.0.iflib.override_qs_enable: 0<br>dev.em.= 0.iflib.override_nrxqs: 0<br>dev.em.0.iflib.override_ntxqs: 0<br>dev.em.0.i= flib.driver_version: 7.7.8-fbsd<br>root@s1:~ # <br></div><div dir=3D"ltr"><= br clear=3D"all"><div><div dir=3D"ltr" class=3D"gmail_signature"><div dir= =3D"ltr"><div><br></div>Best Regards,<div>Cheng Cui</div></div></div></div>= <br></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_at= tr">On Sun, May 7, 2023 at 4:18=E2=80=AFPM Yuri <<a href=3D"mailto:yuri@= aetern.org">yuri@aetern.org</a>> wrote:<br></div><blockquote class=3D"gm= ail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,= 204,204);padding-left:1ex">Cheng Cui wrote:<br> > Hello,<br> > <br> > I am using this em(4) driver for some tests. According to the man page= <br> > below, there should be a "hw.em.msix" sysctl to enable/disab= le MSI-X<br> > style interrupts. But why is it missing in my system below?<br> > <a href=3D"https://man.freebsd.org/cgi/man.cgi?em(4)" rel=3D"noreferre= r" target=3D"_blank">https://man.freebsd.org/cgi/man.cgi?em(4)</a><br>; > <<a href=3D"https://man.freebsd.org/cgi/man.cgi?em(4)" rel=3D"noref= errer" target=3D"_blank">https://man.freebsd.org/cgi/man.cgi?em(4)</a>><= br> > <br> > root@s1:~ # dmesg | egrep "8254"<br> > Timecounter "i8254" frequency 1193182 Hz quality 0<br> > Event timer "i8254" frequency 1193182 Hz quality 100<br> > em0: <Intel(R) Legacy PRO/1000 MT 82541GI> port 0xdcc0-0xdcff me= m<br> > 0xdfae0000-0xdfafffff irq 64 at device 7.0 on pci6<br> > em1: <Intel(R) Legacy PRO/1000 MT 82541GI> port 0xccc0-0xccff me= m<br> > 0xdf8e0000-0xdf8fffff irq 65 at device 8.0 on pci7<br> > em2: <Intel(R) Legacy PRO/1000 MT 82546EB (Copper)> port 0xbcc0-= 0xbcff<br> > mem 0xdf5e0000-0xdf5fffff irq 106 at device 4.0 on pci9<br> > em3: <Intel(R) Legacy PRO/1000 MT 82546EB (Copper)> port 0xbc80-= 0xbcbf<br> > mem 0xdf5c0000-0xdf5dffff irq 107 at device 4.1 on pci9<br> > em4: <Intel(R) Legacy PRO/1000 MT 82546EB (Copper)> port 0xacc0-= 0xacff<br> > mem 0xdf3e0000-0xdf3fffff irq 101 at device 3.0 on pci10<br> > em5: <Intel(R) Legacy PRO/1000 MT 82546EB (Copper)> port 0xac80-= 0xacbf<br> > mem 0xdf3c0000-0xdf3dffff irq 102 at device 3.1 on pci10<br> > <br> > root@s1:~ # ifconfig em5<br> > em5: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric= 0 mtu 1500<br> > options=3D481009b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM= ,VLAN_HWFILTER,NOMAP><br> > ether 00:04:23:b7:1e:1d<br> > inet 10.1.1.2 netmask 0xffffff00 broadcast 10.1.1.255<br> > media: Ethernet 1000baseT <full-duplex><br> > status: active<br> > nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL><br> > <br> > root@s1:~ # sysctl hw.em<br> > hw.em.max_interrupt_rate: 8000<br> > hw.em.eee_setting: 1<br> > hw.em.rx_process_limit: 100<br> > hw.em.sbp: 0<br> > hw.em.smart_pwr_down: 0<br> > hw.em.rx_abs_int_delay: 66<br> > hw.em.tx_abs_int_delay: 66<br> > hw.em.rx_int_delay: 0<br> > hw.em.tx_int_delay: 66<br> > hw.em.disable_crc_stripping: 0<br> > root@s1:~ #<br> <br> As if_em was converted to iflib, I guess the related sysctl would now be<br= > dev.em.0.iflib.disable_msix (I could be wrong, don't have h/w to check)= .<br> </blockquote></div></div> --0000000000003723e605fb22e2d3--
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