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Date: Tue, 9 Jul 2013 15:51:50 +0000 From: "Ronciak, John" <john.ronciak@...el.com> To: Pavel Machek <pavel@....cz>, "Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>, "Brandeburg, Jesse" <jesse.brandeburg@...el.com>, "Allan, Bruce W" <bruce.w.allan@...el.com>, "Wyborny, Carolyn" <carolyn.wyborny@...el.com>, "Skidmore, Donald C" <donald.c.skidmore@...el.com>, "Rose, Gregory V" <gregory.v.rose@...el.com>, "Waskiewicz Jr, Peter P" <peter.p.waskiewicz.jr@...el.com>, "Duyck, Alexander H" <alexander.h.duyck@...el.com>, "Dave, Tushar N" <tushar.n.dave@...el.com>, "e1000-devel@...ts.sourceforge.net" <e1000-devel@...ts.sourceforge.net>, "netdev@...r.kernel.org" <netdev@...r.kernel.org> Subject: RE: e1000e on thinkpad x60: interrupt problem Nothing appears to be wrong. If the system is seeing ping packets at all means that device is generating interrupts and that they are being processed. If you are looking at performance then sharing interrupts is probably not a good idea. Since you are on a laptop it may not be easy to separate the networking device onto its own interrupt. The interrupt is shared with a lot of other devices and not just ahci. Cheers, John > -----Original Message----- > From: Pavel Machek [mailto:pavel@....cz] > Sent: Monday, July 08, 2013 6:05 PM > To: Kirsher, Jeffrey T; Brandeburg, Jesse; Allan, Bruce W; Wyborny, > Carolyn; Skidmore, Donald C; Rose, Gregory V; Waskiewicz Jr, Peter P; > Duyck, Alexander H; Ronciak, John; Dave, Tushar N; e1000- > devel@...ts.sourceforge.net; netdev@...r.kernel.org > Subject: e1000e on thinkpad x60: interrupt problem > > Hi! > > I'm using > > 02:00.0 Ethernet controller: Intel Corporation 82573L Gigabit Ethernet > Controller > > on thinkpad x60. Kernel is 3.10. > > # CONFIG_E100 is not set > # CONFIG_E1000 is not set > CONFIG_E1000E=y > > Interrupts are like this: > > pavel@amd:/data/l/linux-good$ cat /proc/interrupts > CPU0 CPU1 > 0: 95454037 5192 IO-APIC-edge timer > 1: 16292 20 IO-APIC-edge i8042 > 3: 9 0 IO-APIC-edge > 4: 9 0 IO-APIC-edge > 7: 0 0 IO-APIC-edge parport0 > 8: 1 0 IO-APIC-edge rtc0 > 9: 19471974 1207 IO-APIC-fasteoi acpi > 12: 168092 15 IO-APIC-edge i8042 > 14: 3568551 165 IO-APIC-edge ata_piix > 15: 0 0 IO-APIC-edge ata_piix > 16: 14033945 877 IO-APIC-fasteoi i915, ahci, yenta, > uhci_hcd:usb2, eth0 > > but it seems that eth0 is not generating interrupts at all: > > ... > 64 bytes from 10.0.0.251: icmp_req=32 ttl=64 time=26.2 ms > 64 bytes from 10.0.0.251: icmp_req=33 ttl=64 time=16.6 ms > 64 bytes from 10.0.0.251: icmp_req=34 ttl=64 time=1.14 ms > 64 bytes from 10.0.0.251: icmp_req=35 ttl=64 time=56.4 ms ^C > --- 10.0.0.251 ping statistics --- > 35 packets transmitted, 35 received, 0% packet loss, time 34140ms rtt > min/avg/max/mdev = 1.024/20.173/88.285/25.281 ms > pavel@amd:/data/l/linux-good$ ping 10.0.0.251 > > Note huge latencies. But as interrupt is shared with ahci, I can help > with: > > pavel@amd:~$ sudo cat /dev/sda > /dev/null [sudo] password for pavel: > > Then latencies get to high but reasonable range: > > pavel@amd:/data/l/linux-good$ ping 10.0.0.251 PING 10.0.0.251 > (10.0.0.251) 56(84) bytes of data. > 64 bytes from 10.0.0.251: icmp_req=1 ttl=64 time=1.14 ms > 64 bytes from 10.0.0.251: icmp_req=2 ttl=64 time=3.79 ms > 64 bytes from 10.0.0.251: icmp_req=3 ttl=64 time=1.24 ms > 64 bytes from 10.0.0.251: icmp_req=4 ttl=64 time=1.54 ms > 64 bytes from 10.0.0.251: icmp_req=5 ttl=64 time=2.04 ms > 64 bytes from 10.0.0.251: icmp_req=6 ttl=64 time=2.48 ms > 64 bytes from 10.0.0.251: icmp_req=7 ttl=64 time=1.90 ms > 64 bytes from 10.0.0.251: icmp_req=8 ttl=64 time=2.30 ms (other > attempt) > --- 10.0.0.251 ping statistics --- > 22 packets transmitted, 22 received, 0% packet loss, time 21128ms rtt > min/avg/max/mdev = 0.940/1.733/3.604/0.685 ms > > root@amd:/data/l/linux-good# ethtool -e eth0 Offset Values > ------ ------ > 0x0000 00 16 d3 25 19 04 30 0b b2 ff 51 00 ff ff ff ff > 0x0010 53 00 03 02 6b 02 7e 20 aa 17 9a 10 86 80 df 80 > 0x0020 00 00 00 20 54 7e 00 00 14 00 da 00 04 00 00 27 > 0x0030 c9 6c 50 31 3e 07 0b 04 8b 29 00 00 00 f0 02 0f > 0x0040 08 10 00 00 04 0f ff 7f 01 4d ff ff ff ff ff ff > 0x0050 14 00 1d 00 14 00 1d 00 af aa 1e 00 00 00 1d 00 > 0x0060 00 01 00 40 32 12 07 40 ff ff ff ff ff ff ff ff > 0x0070 ff ff ff ff ff ff ff ff ff ff ff ff ff ff fd 5d > > 02:00.0 Ethernet controller: Intel Corporation 82573L Gigabit Ethernet > Controller > Subsystem: Lenovo ThinkPad X60s > Flags: bus master, fast devsel, latency 0, IRQ 16 > Memory at ee000000 (32-bit, non-prefetchable) [size=128K] > I/O ports at 2000 [size=32] > Capabilities: [c8] Power Management version 2 > Capabilities: [d0] MSI: Enable- Count=1/1 Maskable- 64bit+ > Capabilities: [e0] Express Endpoint, MSI 00 > Capabilities: [100] Advanced Error Reporting > Capabilities: [140] Device Serial Number 00-16-d3-ff-ff-25-19- > 04 > Kernel driver in use: e1000e > > Any ideas how to debug/fix this? > > [Maybe related: https://bugzilla.kernel.org/show_bug.cgi?id=6929 but > that was fixed in 2007. And yes, it _is_ better with bigger packets.]? > > Pavel > -- > (english) http://www.livejournal.com/~pavelmachek > (cesky, pictures) > http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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