of a 4TB disk. Unfortunately, since both
GPT and MBR work off of block offsets, partitions created in one mode won't
work in the other, so you can't just swap a disk in and out of the enclosure
without (carefully) repartitioning.
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In the last episode (Sep 18), Mark Saad said:
On Tue, Sep 17, 2013 at 2:11 PM, Dan Nelson dnel...@allantgroup.com wrote:
In the last episode (Sep 17), Mark Saad said:
Can someone shed some light on a OID mystery I have. I am using
cacti to trend some snmp data off a bunch of FreeBSD
That's a counter, so it's reporting the total number of pageins since boot
(or since snmp started, depending on the particular value you're fetching).
Cacti should be able to poll that OID and graph the difference over time to
show pageins/sec.
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, process results in final
component, and being able to simply set variables there that can be used in
the rest of the script is very elegant.
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for stuff like this, I think, and
it includes a C API. It's licensed under the Eclipse Public License.
http://www.graphviz.org/
http://www.graphviz.org/Gallery.php
http://www.graphviz.org/doc/libguide/libguide.pdf
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lower total meory usage if you are using a lot of threads. I'd take
a look at the G and R flags first.
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.
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R+ 0:00.00 sh xxx
88321 p0 R+ 0:00.00 sh xxx
Can someone explain this ?
What does your script do? If it contains subshells or pipelines, the main
process will fork child processes to handle those.
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In the last episode (Nov 02), Dan Nelson said:
In the last episode (Nov 02), Mark Saad said:
Hackers
What is going on here, if I run the following shell script, what is
the expected output . The script is named xxx
#!/bin/sh
ps -ax | grep -v grep | grep xxx
Here is what I see
In the last episode (Oct 25), Christopher J. Ruwe said:
On Mon, 24 Oct 2011 15:42:10 -0500
Dan Nelson dnel...@allantgroup.com wrote:
In the last episode (Oct 24), Christopher J. Ruwe said:
On Sun, 23 Oct 2011 19:10:34 -0500
Dan Nelson dnel...@allantgroup.com wrote:
In the last
In the last episode (Oct 24), Christopher J. Ruwe said:
On Sun, 23 Oct 2011 19:10:34 -0500
Dan Nelson dnel...@allantgroup.com wrote:
In the last episode (Oct 23), Christopher J. Ruwe said:
I need to get the maximum size of an pwd-entry to determine the
correct buffersize for calling
an even longer string to a get*_r call. It's up to
you to decide what your own limit is :)
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look at the source to the procstat
command, which uses some other calls to dump the vm map of processes.
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protocol. It really reduces the socket count to your
ldap server, and removes the potential namespace problems caused by
dlopening libldap.so in every process.
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than 4GB of
swap is probably never going to be used, and if it is used, you're just
going to thrash your swap device. If you have 128GB of RAM and need to swap
to disk, you desperately need more RAM, not swap :)
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In the last episode (Sep 05), Eitan Adler said:
On Mon, Sep 5, 2011 at 3:48 PM, Dan Nelson dnel...@allantgroup.com wrote:
In the last episode (Sep 05), Sean Hamilton said:
What is the state of the art for the recommended amount of swap in
FreeBSD? Both normal systems with 512 MB - 8 GB
fails with
Illegal instruction
Were the crt*.o files on your fast machine also compiled with -march=i586 ?
If you run gdb on the core file, can you determine what function the bad
instruction is in?
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, they should probably start filling
the gaps instead. The 100s and 200s are pretty dense, but 350-399 only has
5 entries, 400-499 has 4, 600-699 has 7, 700-799 has 3, etc.
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is due to that.
Unrelated but still interesting note on your particular CPU:
http://www.passmark.com/forum/showthread.php?t=2256
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Index: ps.1
===
--- ps.1 (revision 219700)
+++ ps.1 (working copy)
@@ -587,6 +587,8 @@ symbolic process state (alias
saved gid
In the last episode (Mar 16), Kostik Belousov said:
On Wed, Mar 16, 2011 at 12:56:14PM -0500, Dan Nelson wrote:
In the last episode (Mar 16), Thiago Damas said:
Hi,
without procfs, there is a way to get usertime and systime from a
running process?
Try applying the attached
to funopen().
Then you'd have a regular FILE* that you could call with regular stdio
functions. Getting the buffering right for good performance might get
tricky, though.
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, cache_lock, Name Cache);
The CACHE_*LOCK() macros.c in vfs_cache use cache_lock, so you've got lots
of possible contention points. procstat -ka and/or dtrace might help you
determine exactly where.
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usb controller and device that you control the card with?
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downloaded by
cd /usr/ports/devel/git ; make fetch-recursive
is, shall we say, impressive.
I use the devel/hg-git port to pull all the git trees I need to access using
mercurial.
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? I know of at least
one system where it takes more than 100ms to query the battery state due
to extremely slow hardware, I wouldn't be surprised if you can do worse.
I have an old Dell laptop where it takes almost a full second to fetch
battery data via ACPI.
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? GDB might just enumerate the
currently active threads starting from 1.
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the DEPENDS_* comparison
operators at all, so unless you read (and understood) the
${deptype:L}-depends target in bsd.port.mk, you might not know it existed.
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In the last episode (Apr 22), Dan Nelson said:
In the last episode (Apr 22), Steve Franks said:
(such as myself) incorrectly pointing a port at libpng.5 instead of any
libpng, or libpng = 5. Once the ports tree is 'poisoned' in this
fashion, there's really no going back. I'd sure vote
/libart_lgpl_2.so.2 (0x7fa047234000)
libm.so.6 = /lib64/libm.so.6 (0x7fa0470df000)
libc.so.6 = /lib64/libc.so.6 (0x7fa046e9f000)
/lib64/ld-linux-x86-64.so.2 (0x7fa04785e000)
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will respond on
the basis of your support entitlement.
Looks like you crashed VMWare. That shouldn't happen. Send the log and
core file to VMWare support and they should be able to help you.
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() clears, but I don't see it. Maybe some kernel
hacker can explain it better :) Regardless, the size of the allocation at
this point isn't important, since you know all the items in the page are the
same size.
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ONLINE 0 0 0
md2 OFFLINE 0 0 0
md3 ONLINE 0 0 0
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the per-thread CPU counts when displaying the per-process numbers, but it
doesn't seem to.
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holding the mutex, and will be fairly scheduled by the
kernel.
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In the last episode (Dec 21), Zaphod Beeblebrox said:
On Sun, Dec 20, 2009 at 12:27 AM, Dan Nelson dnel...@allantgroup.com wrote:
In the last episode (Dec 19), Zaphod Beeblebrox said:
Here's an interesting conundrum. I don't know what's different between
the TCP that scp uses from the TCP
each command. According to the mount_nfs manpage, it
looks like there is some prefetching that can be enabled with the -a ##
option. It doesn't say what the default is, though.
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, as far as I can see the kinfo_proc structure only contains
the sum of user time and system time and not the two values separately,
or have I missed something?
Take a look at the the ki_rusage struct inside kinfo_proc.
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stuff here */
return 0;
}
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accurate numbers (but
you have to manually sum up the threads usage if you want to see the total
%CPU for an entire process).
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counts. If it's supported under OpenSolaris
it should be easy to check and see whether it's dependant on Sun hardware or
works with any PC (just boot it up and run busstat -l).
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to finish.
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/readlink.html
I will be very thankful if you can help me with it.
#includestdio.h
int readlink(void *a, void *b)
{
exit(0);
}
int main(int argc, char **argv)
{
printf(Hello World);
}
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functions :(
What I do wrong ?
/usr/src/contrib is a repository of 3rd-party source trees, and they're not
meant to be built from. Try running your make ; make install in
/usr/src/lib/libpcap instead.
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for, and then I realized I have a patch that I have never submitted
a PR for: the addition of systime and usertime ps keywords :) It simply
reads the rusage struct, and returns the same values that getrusage() does.
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Index: extern.h
on the
same port a second time. Or if you know ruby, you could instrument the code
that checks for port build errors and see if it's got a bug in it...
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a threaded process. If you are trying to do anything other than
that, it may or may not work on FreeBSD, but it is not guaranteed and
is not portable.
The Rationale section of the pthread_atfork() page is a good read here,
too.
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);
return 0;
}
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In the last episode (Nov 13), Charles Darwin said:
On 12-Nov-08, at 6:43 PM, Dan Nelson wrote:
In the last episode (Nov 12), Charles Darwin said:
Hi all,
Title is the question actually: Is chflags' nodump + sunlnk =
uchg
No; why would it be?
I mean as far as their effect
wheel uchg 0 Nov 12 17:42 b
#
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/O. On
ATA or SATA disks, you might want to set it to 2.
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, and since there are no 32-bit binaries required
to boot a 64-bit system, there is no need for a /lib32.
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compression block
size? Bzip2's default blocksize is 900k, for example.
b) Is there any objection to the following patch to cat:
It might be simpler to just use dd if=myfile obs=1m instead of
patching cat.
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In the last episode (Oct 19), Ivan Voras said:
Dan Nelson wrote:
In the last episode (Oct 18), Ivan Voras said:
I'm working on a program that's intended to be used as a filter,
as in something | myprogram file. I'm trying it with cat and
I'm seeing my read()s return small blocks, 64 kB
In the last episode (Oct 19), Ivan Voras said:
2008/10/19 Dan Nelson [EMAIL PROTECTED]:
In the last episode (Oct 19), Ivan Voras said:
Of course. But that's not the point :) From what I see (didn't
look at the code), Linux for example does some kind of internal
buffering that decouples
is aware
of changes the other makes. You would need a shared-storage cluster
filessytem to be able to do that (or mount the volume read-only on both
servers).
Mount the filesystem on one server only, then access it via NFS from
the other.
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an amd64 winpower binary? If not, you'll probably need
to install an x86 java. You can't mix libraries for different
architectures.
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to the deny rule.
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In the last episode (Sep 09), Daan Vreeken said:
On Monday 08 September 2008 22:03:29 Dan Mahoney, System Admin wrote:
On Mon, 8 Sep 2008, Dan Nelson wrote:
In the last episode (Sep 08), Dan Mahoney, System Admin said:
I have the following rule set up in ipfw to limit the exposure
,O_RDONLY,00) = 4 (0x4)
#
Read-only opens of /dev/mem are allowed. kgdb -w should fail,
however.
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In the last episode (Jun 18), Zane C.B. said:
Any one know of any recent documentation for adding a sysctl to a
kernel module for FreeBSD 6 and 7?
man 9 sysctl
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by /usr/bin/gzexe; that's one way to
do it (basically, determine the number of lines in your shell script,
append your binary file to the end of the script, and use tail to
extract only the binary file to a tempfile).
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or are
developed outside the FreeBSD cvs tree do have versions of their own.
awk and tar, for example both recognize the --version flag (but not -v
since that is already used).
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the fd? From my reading of the manpages,
unless you specified EV_ONESHOT when you added the event, events will
fire until you remove them or the condition that triggers them stops.
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Index: kern_event.c
In the last episode (Jan 03), Metin KAYA said:
Hi all,
How select(2) will behave if I give the utimeout parameter as
NULL?
From the man page:
If timeout is a null pointer, the select blocks indefinitely.
http://www.freebsd.org/cgi/man.cgi?query=select
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syscalls you aren't aware of?
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)
- 'On the fly' filesystem compression (and it takes less read/write
compressed data than non-compressed)
zfs already has modular compression algorithms; it would be rather easy
to add a mozule for your method and compare it to the existing gzip and
lzjb algorithms.
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hidden under the PPP_DEFLATE kernel option (the source
is in sys/net/ppp_deflate.c). The functions are all prefixed with z_,
but apart from that it works the same as userland zlib.
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attributes. That way you can do
simple things like name-uid lookups without having to bind at all.
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into libc and is used for the hashed passwd termcap
databases.
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it. There is apparently a
kern.file sysctl that holds the open file table, but fstat digs
through kernel memory.
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.
...
Unary operators shouldn't get parsed as such unless there are two
arguments.
http://www.marcuscom.com/downloads/test.c.diff
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on
the Cisco for any non-switch ports, btw. Takes the port setup time
down from 30 seconds to under 5.
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for
unprivileged users.
Users can hog CPU by running while true ; do done or any number of
other methods. That's what CPU limits are for :)
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In the last episode (Jan 15), girish r said:
You'll need to include options P1003_1B_SEMAPHORES in your kernel
config, or load the sem kernel module.
--Dan Nelson
I could'nt find sem so I tried sysvsem.ko but I get:
kldload: can't load sysvsem: File exists
Does it mean that sysvsem
.
and if you don't have source installed, you can download it:
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/synching.html
or browse the CVS repository online:
http://www.freebsd.org/cgi/cvsweb.cgi/src/
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it, it spits out Bad system call (core dump).
Specifically, I am trying to run this program given here:
http://www.informit.com/articles/article.asp?p=679545seqNum=3rl=1;.
You'll need to include options P1003_1B_SEMAPHORES in your kernel
config, or load the sem kernel module.
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adds paths to the end of the search list, so if there's a
/usr/local/lib/libabc.so, the linker will use that.
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for the ld commandline), then launches
the real mcpcom binary.
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the compile step, -L is for libraries and is used during the
link step. Your commandline is a direct source-to-executable command,
so it requires both.
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http
).
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exists, of course).
That's why I said Take a look at how the tail command does it, not
Use the tail command :)
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this is something to take up with the software authors.
Well, it doesn't seem to do so under Linux / Debian, and people on the
#ser IRC channel have sent me to FreeBSD's maintainers :(
They probably meant the maintainer of that particular port, which in
net/ser's case is [EMAIL PROTECTED] .
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whether the offsets are relative or absolute by looking at
what the 'c' partition's offset is.
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In the last episode (Jul 28), Jaye Mathisen said:
On Fri, Jul 28, 2006 at 11:18:48PM -0500, Dan Nelson wrote:
In the last episode (Jul 28), Jaye Mathisen said:
s2# mount -t fdescfs fdescfs /dev/fd
s2# ls -l /dev/fd
total 16
crw--w 1 root tty 5, 1 Jul 28 18:01 0
, and the permissions look fine.
fd 3 is your current directory (so I guess you're in some smtp-related
directory?), and fd 4 is the directory on the commandline (/dev/fd).
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test.c, and if you intend on linking
to the library, you will also need to add -L/usr/local/lib -lldap.
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executables for any modern system except Solaris, so
it would have to have a lot of work done on it to be useful.
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how many programs would break if the mmap syscall returned an
error if neither MAP_PRIVATE or MAP_SHARED were set...
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.
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In the last episode (May 31), Zaphod Beeblebrox said:
On 5/31/06, Eugene M. Kim [EMAIL PROTECTED] wrote:
Dan Nelson wrote:
Are you using the -C option to dump? I would expact that to help
more in the dumping directories step, but it might help later
phases too.
Yep, -C32.
I'm
directories step, but it might help later phases too.
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with a lot of free memory for a short period of time, and it may
try paging in another process that was completely paged out (if you are
low enough on RAM for that to have happened). That could cause
pagedaemon activity.
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In the last episode (May 10), Iasen Kostov said:
On Wed, 2006-05-10 at 11:18 -0500, Dan Nelson wrote:
In the last episode (May 10), Iasen Kostov said:
On Wed, 2006-05-10 at 15:32 +0300, Iasen Kostov wrote:
On Wed, 2006-05-10 at 15:28 +0300, Iasen Kostov wrote:
I (probably) have some
. Saves having to parse the string every time if you are looking
up the same sysctl repeatedly.
sysctlbyname(hw.ncpu, ncpu, len, NULL, 0);
HW_NCPU is the mib number for hw.ncpu if you want to build the mib
array manually.
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Dan Nelson
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. Your shell's echo builtin
may or may not, but for portability, you have to assume it doesn't.
Use the printf command if you want fancy formatting.
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http
with it?
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;
error = knote_attach(kn, kq);
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In the last episode (Apr 01), Vclav Haisman said:
Dan Nelson wrote:
It's a kqueue bug, but a minor one. The problem is that the same
flags field is used to pass actions from the client, and return
status from the kernel. When you call kqueue with EV_ADD, the
kernel never clears
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