SMS server/gateway
by Jamie Bohr
I am looking for a SMS server software for RHEL.
The phones we use can receive email but it does not always get to the phone
in a timely manner and sometimes I get "connected refused" when trying to
send messages via email. I've looked at smstools and Googled around but
would like the forums opinion on what they have used and experiences.
Thank you for your time,
--
Jamie Bohr
14 years, 1 month
general advice for rolling back yum updates?
by Mark Miller
Hello, all.
I recently ran a <yum update> on my mythdora server, which updated my myth
applications from 0.22-1 to 0.22-5. Now the mythfrontend application
terminates right after being launched and the log ends with
2010-02-28 10:27:10.774 Registering Internal as a media playback plugin.
Floating point exception
I have written to the myth users list, but I thought somebody on this list
might be able to give me some advice, too.
Since the previous version of the myth apps ran pretty well for me, I would
like explore the possibility of going back to that version. However, I
don't have any experience rolling back yum updates If rollbacks require
some before-the-fact configuration, I probably don't have that :-(
Any suggestions?
Mark
14 years, 1 month
Re: Nehalem network performance
by Kelvin Ku
On Fri, Jan 29, 2010 at 12:22:05PM +0200, Gilboa Davara wrote:
> > which
> > was throttling the CPUs to 1.6 GHz (from a maximum of 2.4 GHz). I attempted to
> > remedy this by setting InterruptThrottleRate=0,0 in the e1000e driver, after
> > which we had one full day of testing with zero rx_missed_errors, but the
> > application still reported packet loss.
>
> rx_missed_error usually get triggered when the kernel is slow to handle
> incoming hardware interrupts.
> There's a trade-off here, increase the interrupt rate and you'll
> increase the kernel CPU usage as the expense of lower latency - decrease
> the interrupt rate, and you'll reduce the CPU usage at the expense of a
> higher chance of hitting the RX queue limit.
> I'd suggest you try setting the InterruptThrottleRate to 1000, while
> increasing the RX queues to 4096.
> (sbin/ethtool -G DEVICE rx 4096)
>
> You could try enabling multi-queue by adding IntterruptType=2,
> RSS=NUM_OF_QUEUE and MQ=1 to your modprobe.conf.d.
I'll try these suggestions later today. Note that I was able to disable
interrupt throttling on the on-board 82574L NICs without seeing any
rx_missed_errors.
>
> Can you post the output of $ mpstat -P 1 ALL during peak load?
>
We run "mpstat -P 5 ALL" continuously; is this sufficient resolution? I've
attached the mpstat output from the 09:30-10:30 yesterday, which is one of the
busiest hours of the day for multicast traffic.
Also, here is the top of the output from powertop. Are you running with C-STATE
enabled? It is somewhat troubling that more than half of the time is spent in
the most power-saving state (C3), but I think this is averaged across all CPUs.
PowerTOP version 1.11 (C) 2007 Intel Corporation
Cn Avg residency P-states (frequencies)
C0 (cpu running) (15.2%)
polling 5.5ms ( 4.1%)
C1 halt 0.2ms (23.0%)
C2 mwait 0.2ms ( 4.6%)
C3 mwait 0.4ms (53.1%)
Wakeups-from-idle per second : 2833.7 interval: 10.0s
no ACPI power usage estimate available
Top causes for wakeups:
47.7% (8416.6) <interrupt> : lan1-TxRx-0
25.5% (4498.9) <kernel IPI> : Rescheduling interrupts
13.2% (2324.3) <kernel core> : hrtimer_start_range_ns (tick_sched_timer)
5.7% (1000.9) kipmi0 : __mod_timer (process_timeout)
4.1% (721.9) <interrupt> : lan0-TxRx-0
2.3% (413.0) <interrupt> : extra timer interrupt
0.6% ( 99.8) <kernel module> : __mod_timer (smi_timeout)
0.5% ( 93.1) <interrupt> : ata_piix, ata_piix, uhci_hcd:usb5, uhci_hcd:
0.1% ( 17.2) <kernel core> : __mod_timer (neigh_periodic_timer)
0.1% ( 11.1) <kernel core> : hrtimer_start (tick_sched_timer)
0.1% ( 10.4) vconfig : __mod_timer (garp_join_timer)
0.1% ( 10.0) <kernel module> : __mod_timer (ipmi_timeout)
...
Thanks,
Kelvin
14 years, 1 month
Setting GDM Login Screen Background
by Sawrub
Hi All,
Appearance Preferences > Background and selecting 'Make Default' used to
set the selected desktop background as the background image for the GDM
login screen and used to work till F11, but is not working as desired
under F12. Is there any other setting that i'm missing under F12 to do
the same.
--
Saurabh Sharma
Linux user number: 490644
http://sawrub-blog.blogspot.com/
Open your doors.......It's time to look beyond Windows
14 years, 1 month
Fedora 12 new updated kernel won't boot
by barry yu
Fedora 12 32bit version, after updated by yum for all, when rebooted to
GRUB menu, selected the new kernel 2.6.31.12-174.2.22.fc12.i686.PAE,
won't boot, reboot system back to grub menu and chose previous kernel
2.6.31.12-174.2.3.fc12.i686.PAE to start f12, still works, is there any
fix available or have to wait for f13
14 years, 1 month
FC12 udev rules
by Terry Horsnell
Hi all,
I need to set up a custom rule to give me mode 666 on a custom USB device
(or on all the otherwise un-handled USB devices).
I used to do this (in FC9) by modifying ruleset 50-udev-default.rules at
the libusb entry (I know this was not the 'correct' way, but I could never
understand udev enough to work out what *was* the correct way).
Now that I've moved to FC12, this 50- rulest doesnt exist, and I cant find
where the libusb stuff is now handled. Can someone please tell me how to
correctly add a custom rule. Presumably I have to use a filename which causes
it to be executed in the right order. Does udev stop processing subsequent
rules files when it hits a rule which matches?
In ruleset 50-udev-default.rules I used to have:
###SUBSYSTEM=="usb", ACTION=="add", ENV{DEVTYPE}=="usb_device", NAME="bus/usb/$env{BUSNUM}/$env{DEVNUM}", MODE="0644"
SUBSYSTEM=="usb", ACTION=="add", ENV{DEVTYPE}=="usb_device", NAME="bus/usb/$env{BUSNUM}/$env{DEVNUM}", MODE="0666"
Thanks,
Terry
14 years, 1 month
GoogleEarth segfault
by Matthew Saltzman
I installed the latest GoogelEarth 5.1.3533 from the .bin file (over the
top of an older version that I never got working either), ran restorecon
on the library directory. SElinux stopped complaining about violations
after that, but googleearth still segfaults.
This is 64-bit F12 with the nvidia drivers from rpmfusion.
Anybody with similar experiences? Hints?
TIA.
--
Matthew Saltzman
Clemson University Math Sciences
mjs AT clemson DOT edu
http://www.math.clemson.edu/~mjs
14 years, 1 month
Emacs has very large characters
by Vincent
Hello,
I installed emacs from software that comes with Fedora 12, the
characters are so large that makes unusable. Any body know how to
correct it to a standard font?
14 years, 1 month
Help Diagnose Slow Disc Access
by Mike McCarty
My machine has been running slower and slower, and top seems
to indicate lots of I/O wait. I have two ATA discs on a single
cable, wired for cable select. The master is much faster than
the slave, which seems to indicate a hardware, possibly disc,
problem.
Trimmed output:
$ mount
/dev/hda5 on / type ext3 (rw)
/dev/hdb1 on /home type ext3 (rw)
/dev/hda3 on /boot type ext3 (rw)
Here's the master, and faster, disc:
$ sudo /sbin/fdisk -l /dev/hda
Disk /dev/hda: 40.0 GB, 40020664320 bytes
16 heads, 63 sectors/track, 77545 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Device Boot Start End Blocks Id System
/dev/hda1 1 8625 4346968+ b W95 FAT32
Partition 1 does not end on cylinder boundary.
/dev/hda2 * 8626 60915 26354160 7 HPFS/NTFS
Partition 2 does not end on cylinder boundary.
/dev/hda3 60916 61118 102312 83 Linux
Partition 3 does not end on cylinder boundary.
/dev/hda4 61119 77545 8279208 f W95 Ext'd (LBA)
Partition 4 does not end on cylinder boundary.
/dev/hda5 61119 76505 7755016+ 83 Linux
/dev/hda6 76506 77545 524128+ 82 Linux swap
Here's the slave, and slower, disc:
$ sudo /sbin/fdisk -l /dev/hdb
Disk /dev/hdb: 320.0 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/hdb1 1 38913 312568641 83 Linux
Here are some timings on an otherwise completely
unloaded machine:
$ ls -l *.iso /tmp/*.iso
-rw-rw-r-- 1 jmccarty jmccarty 724559872 Nov 17 22:23
KNOPPIX_V6.2CD-2009-11-18-EN.iso
-rw-rw-r-- 1 jmccarty jmccarty 724559872 Feb 5 17:30
/tmp/KNOPPIX_V6.2CD-2009-11-18-EN.iso
$ time cp KNOPPIX_V6.2CD-2009-11-18-EN.iso fred.iso
real 16m19.492s
user 0m0.169s
sys 0m5.461s
$ time cp /tmp/KNOPPIX_V6.2CD-2009-11-18-EN.iso /tmp/fred.iso
real 1m12.639s
user 0m0.165s
sys 0m5.414s
All discs pass fsck with no problems, though the larger (slower)
disc takes an extremely long time to do so.
I tried using smartctl and it doesn't report any anomalies that
I can see, though when I tried running the self tests, the "fast"
disc passed, but the "slow" disc didn't complete the test in a
reasonable amount of time (over 1/2 hour) each time I tried.
This was done with all file systems mounted.
I have shut down, powered down, and unplugged, then reseated
the all the ATA cable connectors, and reseated all RAM, and
the add-on video board etc., with no change to the timings.
Can anyone give me advice on how to proceed with diagnostics?
What diagnostics does Linux provide which can help me figure
out what's going on? Is there a way to get statistics on
missing interrupts, for example? Perhaps the disc is not generating,
or the cable is dropping, IRQs, and the kernel is falling back
to polling, for example. That's the kind of information I'm
looking for. Something to point me in the direction of where
I may be having a hardware problem.
Mike
--
p="p=%c%s%c;main(){printf(p,34,p,34);}";main(){printf(p,34,p,34);}
Oppose globalization and One World Governments like the UN.
This message made from 100% recycled bits.
You have found the bank of Larn.
I speak only for myself, and I am unanimous in that!
14 years, 1 month
Brother HL-2040 not printing
by Philip Heron
Hi all,
Has anyone had any success printing to a Brother HL-2040 in Fedora
11/12? I've had one for a few years now and it's worked right up until
F11. I thought it was the printer itself at the time, but someone just
tried it with a Mac and it worked fine.
There is no error on the computer, it tells me the document printed. The
printer LED starts to blink as though it is about to start but after
about 10 seconds it stops again.
I'm using the "Brother HL-2060 - CUPS+Gutenprint v5.2.4 Simplified" driver.
-Phil
14 years, 1 month
