Re: missing hw.em.msix support in FreeBSD 14.0-CURRENT?
- Reply: Cheng Cui : "Re: missing hw.em.msix support in FreeBSD 14.0-CURRENT?"
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Date: Mon, 08 May 2023 13:50:03 UTC
Cheng Cui wrote: > A followup question: Shouldn't the man page for em(4) be updated > accordingly, as the sysctls are different now? > > https://man.freebsd.org/cgi/man.cgi?em(4) > <https://man.freebsd.org/cgi/man.cgi?em(4)> https://reviews.freebsd.org/D39999 > On Sun, May 7, 2023 at 9:46 PM Cheng Cui <cc@freebsd.org > <mailto:cc@freebsd.org>> wrote: > > Found the RSS support, only if the hardware is ">= e1000_82571" from > the if_em.c. > > |if (hw->mac.type >= em_mac_min) // #define em_mac_min > e1000_82571 ... scctx->isc_txrx = &em_txrx; ...| > > > Best Regards, > Cheng Cui > > > On Sun, May 7, 2023 at 7:28 PM Cheng Cui <cc@freebsd.org > <mailto:cc@freebsd.org>> wrote: > > 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 PM Yuri <yuri@aetern.org > <mailto: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)> > > <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). >