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Please help if you are a geek in Ubuntu/Linux
Posted by hazuki On 2014/4/5 2:04:22 (817 reads)

Hi all,

Recentely mpserver15 is facing some hardware/driver problem which leads the server offline, and the only way to bring the server back is to restart it. I have tried to use some older kernels but the issue still presists.

Mpserver15 runs in Ubuntu 10.04 LTS and I really hope anybody can direct me to the solution. Below is the log related to the issue:

 

Apr  4 21:06:27 AC-SERVER kernel: [478876.033775] i2c i2c-3: sendbytes: NAK bailout.
Apr  4 21:36:31 AC-SERVER kernel: [480680.258273] i2c i2c-3: sendbytes: NAK bailout.
Apr  4 22:49:51 AC-SERVER kernel: [485080.001554] i2c i2c-3: sendbytes: NAK bailout.
Apr  5 01:45:01 AC-SERVER kernel: [495589.824021] ------------[ cut here ]------------
Apr  5 01:45:01 AC-SERVER kernel: [495589.824034] WARNING: at /build/buildd/linux-3.2.0/net/sched/sch_generic.c:255 dev_watchdog+0x25a/0x270()
Apr  5 01:45:01 AC-SERVER kernel: [495589.824037] Hardware name: Unknow
Apr  5 01:45:01 AC-SERVER kernel: [495589.824039] NETDEV WATCHDOG: eth1 (r8169): transmit queue 0 timed out
Apr  5 01:45:01 AC-SERVER kernel: [495589.824041] Modules linked in: usblp tcp_diag inet_diag btrfs zlib_deflate libcrc32c ufs qnx4 hfsplus hfs minix ntfs vfat msdos fat jfs xfs reiserfs ext2 dm_crypt snd_hda_codec_hdmi rfcomm bnep parport_pc bluetooth ppdev binfmt_misc snd_hda_codec_realtek ip6t_LOG snd_hda_intel xt_hl snd_hda_codec snd_hwdep ip6t_rt snd_pcm nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT ipt_LOG snd_seq_midi xt_limit snd_rawmidi snd_seq_midi_event xt_tcpudp snd_seq xt_addrtype snd_timer snd_seq_device xt_state ip6table_filter snd ip6_tables soundcore nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack_ftp nf_conntrack iptable_filter serio_raw sp5100_tco i2c_piix4 shpchp snd_page_alloc k8temp hwmon_vid ip_tables edac_core edac_mce_amd x_tables mac_hid lp parport pata_atiixp radeon floppy ttm drm_kms_helper drm i2c_algo_bit r8169
Apr  5 01:45:01 AC-SERVER kernel: [495589.824107] Pid: 9049, comm: gzip Not tainted 3.2.0-57-generic #87-Ubuntu
Apr  5 01:45:01 AC-SERVER kernel: [495589.824109] Call Trace:
Apr  5 01:45:01 AC-SERVER kernel: [495589.824112]  <IRQ>  [<ffffffff810681af>] warn_slowpath_common+0x7f/0xc0
Apr  5 01:45:01 AC-SERVER kernel: [495589.824122]  [<ffffffff810682a6>] warn_slowpath_fmt+0x46/0x50
Apr  5 01:45:01 AC-SERVER kernel: [495589.824126]  [<ffffffff810251b2>] ? x86_pmu_enable+0x1f2/0x270
Apr  5 01:45:01 AC-SERVER kernel: [495589.824133]  [<ffffffff8156598a>] dev_watchdog+0x25a/0x270
Apr  5 01:45:01 AC-SERVER kernel: [495589.824137]  [<ffffffff81112750>] ? perf_rotate_context+0x110/0x220
Apr  5 01:45:01 AC-SERVER kernel: [495589.824141]  [<ffffffff81565730>] ? qdisc_reset+0x50/0x50
Apr  5 01:45:01 AC-SERVER kernel: [495589.824144]  [<ffffffff81565730>] ? qdisc_reset+0x50/0x50
Apr  5 01:45:01 AC-SERVER kernel: [495589.824149]  [<ffffffff8107716b>] call_timer_fn+0x3b/0x150
Apr  5 01:45:01 AC-SERVER kernel: [495589.824154]  [<ffffffff8131529d>] ? rb_insert_color+0xad/0x150
Apr  5 01:45:01 AC-SERVER kernel: [495589.824157]  [<ffffffff81565730>] ? qdisc_reset+0x50/0x50
Apr  5 01:45:01 AC-SERVER kernel: [495589.824161]  [<ffffffff81078ab2>] run_timer_softirq+0x132/0x2a0
Apr  5 01:45:01 AC-SERVER kernel: [495589.824165]  [<ffffffff81096365>] ? ktime_get+0x65/0xe0
Apr  5 01:45:01 AC-SERVER kernel: [495589.824169]  [<ffffffff8106fa08>] __do_softirq+0xa8/0x210
Apr  5 01:45:01 AC-SERVER kernel: [495589.824173]  [<ffffffff8109d324>] ? tick_program_event+0x24/0x30
Apr  5 01:45:01 AC-SERVER kernel: [495589.824178]  [<ffffffff8166bdec>] call_softirq+0x1c/0x30
Apr  5 01:45:01 AC-SERVER kernel: [495589.824183]  [<ffffffff810162f5>] do_softirq+0x65/0xa0
Apr  5 01:45:01 AC-SERVER kernel: [495589.824186]  [<ffffffff8106fdee>] irq_exit+0x8e/0xb0
Apr  5 01:45:01 AC-SERVER kernel: [495589.824189]  [<ffffffff8166c79e>] smp_apic_timer_interrupt+0x6e/0x99
Apr  5 01:45:01 AC-SERVER kernel: [495589.824193]  [<ffffffff8166a65e>] apic_timer_interrupt+0x6e/0x80
Apr  5 01:45:01 AC-SERVER kernel: [495589.824195]  <EOI>  [<ffffffff81669b82>] ? system_call_fastpath+0x16/0x1b
Apr  5 01:45:01 AC-SERVER kernel: [495589.824201] ---[ end trace 067845823985b4b6 ]---
Apr  5 01:45:01 AC-SERVER kernel: [495589.850247] r8169 0000:02:00.0: eth1: link up
Apr  5 01:45:13 AC-SERVER kernel: [495601.850256] r8169 0000:02:00.0: eth1: link up
Apr  5 01:45:37 AC-SERVER kernel: [495625.850300] r8169 0000:02:00.0: eth1: link up
Apr  5 01:46:37 AC-SERVER kernel: [495685.850239] r8169 0000:02:00.0: eth1: link up
Apr  5 01:47:25 AC-SERVER kernel: [495733.850243] r8169 0000:02:00.0: eth1: link up
Apr  5 01:48:01 AC-SERVER kernel: [495769.850281] r8169 0000:02:00.0: eth1: link up

 

And network card detail is as follows:

i@AC-SERVER:/var/log$ lspci | awk '/net/ {print $1}' | xargs -i% lspci -ks %
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 01)
        Subsystem: Realtek Semiconductor Co., Ltd. RTL8111/8168 PCI Express Gigabit Ethernet controller
        Kernel driver in use: r8169
        Kernel modules: r8169

 

Any help is appreciated. To contact me, please email to hatsuki_a-ie   屌at屌 yahoo.com.hk

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Announcements -  

mpserver15.flightgear.org will cease act as mpserver with effect from 01.04.2014
Posted by hazuki On 2014/3/22 14:31:51 (760 reads)

Due to low usage and high operation cost on maintaining mpserver15, this site (mpserver15.flightgear.org) will cease act as mpserver with effect from 01.04.2014. Other service (i.e. FGTracker) will remain unchange.

Comments?
Announcements -  

Proposal of additional downtime of FGTracker
Posted by hazuki On 2013/12/6 13:50:08 (930 reads)

Power consumption of FGTracker server contributes a significant cost to me and now I proposing an additional downtime of FGTracker in flavour of my cost cutting plan.  The proposed downtime is from 01:45 UTC+8 to 07:00 UTC+8 daily (That is, 17:45-11:00 UTC). Please drop me emails to hatsuki_a-flightgear ａｔyahoo.com.hk for comments.

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Announcements -  

Not tracking mpserver01?
Posted by hazuki On 2013/6/30 16:37:35 (1149 reads)

Some time between 28 Jun and 30 Jun 2013 FGTracker not tracking mpserver01. I am a bit suprise that quite number of people in the community visits this site (XD) and very kind reporting me their findings. Let me explain the problem:

 

Because of buggy fgms (fgms is a program running in mpserverXX.flightgear.org),communication between fgms and FGTracker was failed and thus corruputed data has been feed in to FGTracker. Currently all servers which was running latest version had been roll back to latest stable version.

 

 

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Announcements -  

Algorithmn changed on calculating Ground speed
Posted by hazuki On 2013/5/29 15:48:04 (858 reads)

Algorithmn on calculating Ground speed has been changed in order to exclude the abnormal record (e.g. flight reset). In old times, when one reset the flghts, the "movement" will be recorded in the tracker and the speed and distance of the flight will become huge if the reset position is far away from the location of the plane before reset. Now, although the movement still records, the ground speed algorithmn will try to exclude the moment when the flight resets. If ground speed is over 2000 m/s, the ground speed will be assummed to be zero. By this setting, max mach, max ground speed and distance will also exclude the moment of reset.

 

In addition, "Effective flight time" is also introduced. "Effective flight time" tries to exclude the player idle time (i.e. ground speed <5 knots). In later updates, the "Effective flight time" will be used in top XX pilots list to prevent one idle the plane for gaining the rank.

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