I've seen some weird cases in the past where there's just no
interrupts making out after boot. I don't know why.

Chances are that's what you're seeing - the frame is going out but
there's no interrupts.

Check vmstat -ia ; see if ath0 is generating interrupts.



-a


On 17 July 2014 03:34, John Hay <j...@meraka.org.za> wrote:
> On Mon, Jul 14, 2014 at 10:37:07PM +0200, John Hay wrote:
>> On Mon, Jul 14, 2014 at 01:02:03PM -0700, Adrian Chadd wrote:
>> >
>> > Ah, you're not even using it in 11n mode. Ok.
>> >
>> > Well, that's 72 mbufs allocated, and up to 200 more being allocated
>> > during transmit. Then there's the handful of pages being used for DMA
>> > descriptors. So yeah, over time that may become a problem.
>> >
>> > Try doubling the number of bounce buffers available and see what happens.
>>
>> The first boot looks good, all 3 aths came up. Bounce buffers just
>> after login:
>>
>> tst-11-arm:~ # sysctl hw.busdma
>> hw.busdma.total_bpages: 128
>> hw.busdma.zone0.total_bpages: 128
>> hw.busdma.zone0.free_bpages: 128
>> hw.busdma.zone0.reserved_bpages: 0
>> hw.busdma.zone0.active_bpages: 0
>> hw.busdma.zone0.total_bounced: 0
>> hw.busdma.zone0.total_deferred: 0
>> hw.busdma.zone0.lowaddr: 0x4000fff
>> hw.busdma.zone0.alignment: 4096
> ...
>> Great! At last it seems like we are making progress. I'll leave it
>> till the morning and then do a few reboots and then some traffic.
>>
>> One question, should the active bounce pages keep growing or stabilize
>> somewhere? How do I know if I have to few or if there is a leak?
>>
>> Thanks Adrian for your help.
>
> I still ran out sometimes during a reboot, so I upped it to 512 and added
> a sysctl to show the max that active_bpages has been. Sometimes just
> after a reboot active_bpages is low and other times higher, I have seen
> 140. A few times during a reboot I see timeouts, which only a reboot
> seem to recover from. Can it be a left over config from the previous boot
> that does not get cleaned out? Or maybe traffic being received while the
> config is happening?
>
> Here is an example during the boot:
>
> ####################
> ...
> ath0: <Atheros 9220> irq 28 at device 1.0 on pci0
> alloc_bounce_pages: numpages 63
> [ath] enabling AN_TOP2_FIXUP
> alloc_bounce_pages: numpages 63
> alloc_bounce_pages: numpages 63
> alloc_bounce_pages: numpages 63
> alloc_bounce_pages: numpages 63
> alloc_bounce_pages: numpages 63
> alloc_bounce_pages: numpages 63
> alloc_bounce_pages: numpages 63
> alloc_bounce_pages: numpages 8
> ath0: AR9220 mac 128.2 RF5133 phy 13.0
> ath0: 2GHz radio: 0x0000; 5GHz radio: 0x00c0
> ath1: <Atheros 9220> irq 27 at device 2.0 on pci0
> [ath] enabling AN_TOP2_FIXUP
> ath1: AR9220 mac 128.2 RF5133 phy 13.0
> ath1: 2GHz radio: 0x0000; 5GHz radio: 0x00c0
> ath2: <Atheros 5413> irq 26 at device 3.0 on pci0
> ath2: AR5413 mac 10.5 RF5413 phy 6.1
> ath2: 2GHz radio: 0x0000; 5GHz radio: 0x0063
> ixpclk0: <IXP4XX Timer> on ixp0
> ixpiic0: <IXP4XX GPIO-Based I2C Interface> on ixp0
> ...
> /sbin/ifconfig.bin wlan0 create wlandev ath0 wlanmode adhoc country ZA
> wlan0: Ethernet address: 00:21:a4:35:70:42
> /sbin/ifconfig.bin wlan0 inet6 ifdisabled
> /sbin/ifconfig.bin wlan0 -bgscan channel 140 ssid mesh bssid 02:8c:ca:fe:ca:00
> /sbin/ifconfig.bin wlan0 inet6 -ifdisabled
> /sbin/ifconfig.bin wlan0 inet6 auto_linklocal
> /sbin/ifconfig.bin wlan0 inet6 -ifdisabled
> dev.ath.0.debug: 0 -> 8
> /sbin/ifconfig.bin wlan0 up
> ath0: ath_init: if_flags 0x8803
> ath0: ath_stop_locked: invalid 0 if_flags 0x8803
> dev.ath.0.debug: 8 -> 0
> ath0: hardware error; resetting
> ath0: 0x00000000 0x00000020 0x00000000, 0x00000000 0x00000000 0x00000000
> ar5416StopDmaReceive: dma failed to stop in 10ms
> AR_CR=0x00000024
> AR_DIAG_SW=0x42000020
> /sbin/ifconfig.bin wlan0 inet6 fd35:ac5b:b116:10:: prefixlen 64 eui64 alias
> /sbin/ifconfig.bin wlan0 inet6 fd35:ac5b:b116:10:: prefixlen 64 alias anycast
> /sbin/ifconfig.bin wlan1 create wlandev ath1 wlanmode adhoc country ZA
> wlan1: Ethernet address: 00:21:a4:35:6c:96
> /sbin/ifconfig.bin wlan1 inet6 ifdisabled
> /sbin/ifconfig.bin wlan1 -bgscan channel 136 ssid mesh bssid 02:88:ca:fe:ca:00
> /sbin/ifconfig.bin wlan1 inet6 -ifdisabled
> /sbin/ifconfig.bin wlan1 inet6 auto_linklocal
> /sbin/ifconfig.bin wlan1 inet6 -ifdisabled
> dev.ath.1.debug: 0 -> 8
> /sbin/ifconfig.bin wlan1 up
> ath1: ath_init: if_flags 0x8803
> ath1: ath_stop_locked: invalid 0 if_flags 0x8803
> R[ 0] (DS.V:0xcd027000 DS.P:0x1227000) L:01227060 D:00089000 *
>       00000000 00000800 0b802c2c 000000b2
>         0000175f 00000100 2f808080 00000000 00000000 00000000 00000003
> R[ 0] (DS.V:0xcd027060 DS.P:0x1227060) L:012270c0 D:0008a000
>       00000000 00000800 00000000 00000000
>         00000000 00000000 00000000 00000000 00000000 00000000 00000000
> dev.ath.1.debug: 8 -> 0
> /sbin/ifconfig.bin wlan1 inet6 fd35:ac5b:b116:10:: prefixlen 64 eui64 alias
> /sbin/ifconfig.bin wlan1 inet6 fd35:ac5b:b116:10:: prefixlen 64 alias anycast
> ifa_add_loopback_route: insertion failed: 17
> ifconfig.bin: ioctl (SIOCAIFADDR): File exists
> /sbin/ifconfig.bin wlan2 create wlandev ath2 wlanmode adhoc country ZA
> wlan2: Ethernet address: 00:21:a4:32:38:c2
> /sbin/ifconfig.bin wlan2 inet6 ifdisabled
> ath0: device timeout
> ar5416StopDmaReceive: dma failed to stop in 10ms
> AR_CR=0x00000024
> AR_DIAG_SW=0x42000020
> /sbin/ifconfig.bin wlan2 -bgscan channel 13 ssid hotspot bssid 
> 02:0d:ca:fe:ca:00
> /sbin/ifconfig.bin wlan2 inet6 -ifdisabled
> /sbin/ifconfig.bin wlan2 inet6 auto_linklocal
> /sbin/ifconfig.bin wlan2 inet6 -ifdisabled
> dev.ath.2.debug: 0 -> 8
> /sbin/ifconfig.bin wlan2 up
> ath2: ath_init: if_flags 0x8803
> ath2: ath_stop_locked: invalid 0 if_flags 0x8803
> dev.ath.2.debug: 8 -> 0
> /sbin/ifconfig.bin wlan2 inet 10.56.244.1/24 alias
> /sbin/ifconfig.bin wlan2 inet6 fd35:ac5b:b116:38f4:: prefixlen 64 eui64 alias
> /sbin/ifconfig.bin wlan2 inet6 fd35:ac5b:b116:38f4:: prefixlen 64 alias 
> anycast
> ...
> ath0: device timeout
> ar5416StopDmaReceive: dma failed to stop in 10ms
> AR_CR=0x00000024
> AR_DIAG_SW=0x42000020
> ...
> tst-11-arm:~ # uptime
>  9:18AM  up 2 mins, 1 user, load averages: 1.63, 0.70, 0.28
> tst-11-arm:~ # sysctl hw.busdma
> hw.busdma.total_bpages: 512
> hw.busdma.zone0.total_bpages: 512
> hw.busdma.zone0.free_bpages: 375
> hw.busdma.zone0.reserved_bpages: 0
> hw.busdma.zone0.active_bpages: 137
> hw.busdma.zone0.max_active_bpages: 137
> hw.busdma.zone0.total_bounced: 1739
> hw.busdma.zone0.total_deferred: 0
> hw.busdma.zone0.lowaddr: 0x4000fff
> hw.busdma.zone0.alignment: 4096
> tst-11-arm:~ # ath0: device timeout
> ar5416StopDmaReceive: dma failed to stop in 10ms
> AR_CR=0x00000024
> AR_DIAG_SW=0x42000020
>
> tst-11-arm:~ # uptime
>  9:20AM  up 4 mins, 1 user, load averages: 0.68, 0.68, 0.34
> tst-11-arm:~ # sysctl hw.busdma
> hw.busdma.total_bpages: 512
> hw.busdma.zone0.total_bpages: 512
> hw.busdma.zone0.free_bpages: 326
> hw.busdma.zone0.reserved_bpages: 0
> hw.busdma.zone0.active_bpages: 186
> hw.busdma.zone0.max_active_bpages: 190
> hw.busdma.zone0.total_bounced: 6592
> hw.busdma.zone0.total_deferred: 0
> hw.busdma.zone0.lowaddr: 0x4000fff
> hw.busdma.zone0.alignment: 4096
> tst-11-arm:~ # ath0: device timeout
> ar5416StopDmaReceive: dma failed to stop in 10ms
> AR_CR=0x00000024
> AR_DIAG_SW=0x42000020
> ath0: device timeout
> ar5416StopDmaReceive: dma failed to stop in 10ms
> AR_CR=0x00000024
> AR_DIAG_SW=0x42000020
> ####################
>
> The 2 other interfaces did not seem to have a problem and after a reboot
> ath0/wlan0 was working fine again.
>
> John
> --
> John Hay -- j...@meraka.csir.co.za / j...@meraka.org.za
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