Re: re0: PHY read failed
On Thu, Nov 17, 2011 at 10:32 AM, John Kotrla jkot...@angelo.edu wrote: I don't use the device, […] any suggestions? Compile it out of your kernel. You should be able to do this by adding: nodevice re to your kernel config and rebuilding. As to the actual problem it sounds like it might be a hardware issue. (Good thing you're not using it.) ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
suggestion for http://krinc.rnd.runnet.ru/FreeBSD/gallery/npgallery.html
Hello, I found your webpage, http://krinc.rnd.runnet.ru/FreeBSD/gallery/npgallery.html, very resourceful for a project I am working on. However, I could not open the page on your site titled Feminism Net that is supposed to go here: http://www.feminism.net/ I found another informative page about feminism, http://www.datehookup.com/content-feminism-resources.htm , which would make a nice replacement or additional resource for your page. I hope my suggestion helps! Regards, Linda Peterson ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: 8.0: OpenSSL stat()'s NLS 500+ times causing extreme system load
On Thu, Dec 17, 2009 at 2:05 AM, Jonathan McKeown j.mcke...@ru.ac.za wrote: It can also be enabled separately in nagios's main config file - child_processes_fork_twice is the option to look for. Actually I had never seen that before. :) I added this setting immediately and it definitely cut the CPU usage down, but the load average went way up. No doubt that's because a lot of processes that don't live long enough for load average accounting for no longer exist. I'm a lot more interested in CPU usage than load average, so it's a big win for me. :) Thanks! ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: 8.0: OpenSSL stat()'s NLS 500+ times causing extreme system load
On Tue, Dec 15, 2009 at 12:53 PM, Dan Nelson dnel...@allantgroup.com wrote: It's defined in src/lib/libc/Makefile, so you should be able to remove that line, rebuild libc and reinstall, and see whether your performance issue goes away. I tried that and as you predicted, all the bogus stat calls went away. Unfortunately the performance issue did not. :( Back to the drawing board for me! Upon further inspection, it seems as though for each check, Nagios spawns a process that spawns a process that spawns a process that runs the check. I did ktrace -i -t w -p (nagiospid) on Nagios for 30 seconds and the ktrace output contained records from 2365 different processes spawned in that 30 seconds. During that time, I would expect about 800 checks to have run, so it does seem like it's right at 3 processes per check. I just don't think the system can keep up with all that fork()ing without going all out; it's just a limit of the Nagios plugin architecture. But thank you very much for point me in the right direction! ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
8.0: OpenSSL stat()'s NLS 500+ times causing extreme system load
We have a Nagios server (ports/net-mgmt/nagios) that has a lot of check_nrpe2 (ports/net-mgmt/nrpe2) checks. We recently upgraded the server it runs on to 8.0-STABLE (r199975). The performance has never been great, but now it's really atrocious and I'm trying to figure out what's going on. The machine (a dual-core Nehalem) has a load average of 5 - 10 at all times, and top shows 100% CPU usage, 75% system CPU usage. No process has more than a few % CPU though. This is due to the large number of very short-lived processes doing individual Nagios checks that don't live long enough to appear in top. I investigated in some more detail with ktrace and found that each execution of check_nrpe2 performs 520 stat() calls. The bulk of them look like this: 81915 check_nrpe2 CALL stat(0x7fbfde28,0x7fbfddc4) 81915 check_nrpe2 NAMI /usr/share/nls/C/libc.cat 81915 check_nrpe2 RET stat -1 errno 2 No such file or directory 81915 check_nrpe2 CALL stat(0x7fbfde28,0x7fbfddc4) 81915 check_nrpe2 NAMI /usr/share/nls/libc/C 81915 check_nrpe2 RET stat -1 errno 2 No such file or directory 81915 check_nrpe2 CALL stat(0x7fbfde28,0x7fbfddc4) 81915 check_nrpe2 NAMI /usr/local/share/nls/C/libc.cat 81915 check_nrpe2 RET stat -1 errno 2 No such file or directory 81915 check_nrpe2 CALL stat(0x7fbfde28,0x7fbfddc4) 81915 check_nrpe2 NAMI /usr/local/share/nls/libc/C 81915 check_nrpe2 RET stat -1 errno 2 No such file or directory 81915 check_nrpe2 CALL stat(0x7fbfde28,0x7fbfddc4) kdump also shows 70 calls to getpid, which seems excessive. (About 50 of them appear to be in a tight loop.) The check_nrpe2 program simply opens an SSL socket to a remote server, sends a short request and gets a short response. It is a pretty simple program. (~22k of source) The calls to getpid() bother me a bit, but I think the NLS is the real problem: $ kdump -E -t n | fgrep /nls/ | head -1 81915 check_nrpe2 0.016815 NAMI /usr/share/nls/C/libc.cat $ kdump -E -t n | fgrep /nls/ | tail -1 81915 check_nrpe2 0.135663 NAMI /usr/local/share/nls/libc/C $ kdump -E | tail -1 81915 check_nrpe2 0.222510 CALL exit(0x1) $ kdump -E -t n | fgrep /nls/ | wc 5082540 32004 So this program spends over half its life looping over 508 stat() calls looking for a nonexistent libc.cat file. And then another chunk (probably a lot smaller, but not measured) looping over getpid(). Both appear to be related to SSL; if I set up nrpe not to use it, both excesses go away and the program finishes in about half the time, using about half the CPU resources. To confirm that it was SSL-related, I tried: $ ktrace openssl s_client -connect x2:5666 And I got the exact same stat() getpid() behavior. Obviously there is some small CPU overhead associated with SSL. This is not about that. This is about the system overhead induced by calling stat 500+ times on a directory that doesn't exist. This gets a little worse. Because there are several checks running at any given time, there is a lot of contention to VFS lookup this handful of paths. That's an area where FreeBSD has known SMP performance issues I've seen discussed elsewhere, and this is a pathological worst case. The net result, a dual core machine is brought to its knees by a relatively simple Nagios setup. Anyway, long story short, why is OpenSSL doing this and how can we make it stop? Thanks for any suggestions! ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: reducing size of apache instances
On Fri, Sep 11, 2009 at 1:48 PM, John Almberg jalmb...@identry.com wrote: As a sanity check... I've been studying these processes all morning. When I use 'top', the column RES shows the amount of RAM used for the process, correct? This is the value I'd like to get down. How many Apache processes are involved, total? Because I'm really not sure how much success you're going to have with this. You're at 22mb already (by comparison mine are 44mb *without* mod_php). How much improvement are you looking for? A couple of megs? Unless there are tens of thousands of processes, buying a couple of gigs of RAM is probably the most time and cost effective solution. Also keep in mind that a lot of the RES is the configuration, which isn't going to change at all when you disable modules. (Unless you change it.) ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: reducing size of apache instances
On Fri, Sep 11, 2009 at 4:20 PM, John Almberg jalmb...@identry.com wrote: I would have thought, but some times it really gets slow and I'm trying to figure out why. When bogged down, the load averages are low. The main thing that looks out of whack is swap space, which seems to never go below 7%, but sometimes gets up into the 20%-30% range. When it gets that high, the server slows to a crawl. In this case you don't want to look at processes with big RES, you want to find processes with a big difference between RES and SIZE and/or the ones with flat-out largest SIZE. Try sorting top by SIZE and see what bubbles up. (Ignore rpc.statd if it's running.) ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: reducing size of apache instances
On Thu, Sep 10, 2009 at 10:58 PM, John Almberg jalmb...@identry.com wrote: I assume that some are critical to the basic operation of Apache. I am hoping I can google a list of these tomorrow. Obviously these I'll have to live with. This is a pretty short list, and Apache won't start without them. All I can think of is a trial and error process (i.e., turn them off one by one and see if anything breaks.) Is there a better way? Other than those core modules you mentioned above, one of the most distinguishing characteristics of modules is that they define config directives that you then use. I would recommend that you walk through your configs and determine which module each and every directive comes from. To a reasonable degree of accuracy, that will give you the list of modules that are really in use. Naturally you'll find some exception(s), but this will get you very close without a lot of trial-and-error downtime. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Where have all the vnodes gone?
With the last few releases, I've noticed a distinct trend toward disappearing vnodes on one of the machines I look after. This machine isn't doing a whole lot. It runs a couple of small web sites, and once an hour it rsync's some files from one NFS mount to another, but the rsync doesn't stay running; it restarts every hour and runs for 10-15 minutes. I set it to log the number of vnodes every ten minutes and this is what I got: 00:47:59 vfs.numvnodes: 39337 00:57:59 vfs.numvnodes: 40568 01:07:59 vfs.numvnodes: 44554 01:17:59 vfs.numvnodes: 52141 01:27:59 vfs.numvnodes: 55713 01:37:59 vfs.numvnodes: 58643 01:47:59 vfs.numvnodes: 60792 01:57:59 vfs.numvnodes: 67130 02:07:59 vfs.numvnodes: 76035 02:17:59 vfs.numvnodes: 84349 02:27:59 vfs.numvnodes: 92187 02:37:59 vfs.numvnodes: 98114 02:47:59 vfs.numvnodes: 116854 02:57:59 vfs.numvnodes: 124842 03:07:59 vfs.numvnodes: 164173 03:17:59 vfs.numvnodes: 172257 03:27:59 vfs.numvnodes: 178388 03:37:59 vfs.numvnodes: 183066 03:47:59 vfs.numvnodes: 190092 03:57:59 vfs.numvnodes: 198322 04:07:59 vfs.numvnodes: 204598 04:17:59 vfs.numvnodes: 208311 04:27:59 vfs.numvnodes: 214207 04:37:59 vfs.numvnodes: 221028 04:47:59 vfs.numvnodes: 227792 04:57:59 vfs.numvnodes: 233214 05:07:59 vfs.numvnodes: 240112 05:17:59 vfs.numvnodes: 247572 05:27:59 vfs.numvnodes: 256090 05:37:59 vfs.numvnodes: 262720 05:47:59 vfs.numvnodes: 269755 05:57:59 vfs.numvnodes: 274986 06:07:59 vfs.numvnodes: 279879 06:17:59 vfs.numvnodes: 287039 06:27:59 vfs.numvnodes: 291984 06:37:59 vfs.numvnodes: 294267 06:47:59 vfs.numvnodes: 296658 06:57:59 vfs.numvnodes: 299086 07:07:59 vfs.numvnodes: 301825 07:17:59 vfs.numvnodes: 309060 07:27:59 vfs.numvnodes: 312955 07:37:59 vfs.numvnodes: 317400 07:47:59 vfs.numvnodes: 320047 At that point the machine crashed with: panic: kmem_malloc(16384): kmem_map too small: 334745600 total allocated If I don't tune kern.maxvnodes up to the point where it panics, then eventually it runs out of vnodes and all sorts of stuff gets stuck in vlruwk. The machine in question is running 7.2-RELEASE-p3, but I already upgraded it from 7.1 trying to get this to go away, so it's a problem that's been around for awhile. My guess is that they're leaking in the kernel somewhere because of the rsync, because there's just not much else going on, but unless I can figure out how many vnodes are being used on a per-process basis, I can't make any headway on proving or disproving that. I do know that according to fstat, there are only 1000-1500 descriptors open at any given time, and kern.openfiles ranges 250-500. So I'm just mystified what the other 30+ could be. Is there any way to figure out where all these vnodes are going? TIA for any advice! ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Embedded scripting language advice sought
On Mon, Jan 19, 2009 at 2:46 PM, George Hartzell hartz...@alerce.com wrote: I don't have any useful advice to offer, but I would love it if you would summarize anything interesting that you get. I do a lot of computational biology work and am always interested in extension language for my computing systems. There was not a lot of response. One suggestion for Tcl and one for Ruby. I figured that all of the possibilities were going to be a pain to develop in their own unique way, so that was probably not the best evaluation criteria. The best choice was going to be the one that the people who were going to use it every day were the most comfortable with. So what I did was code up little samples in each of the serious contenders: Lua, Python, Ruby, and Tcl. Without telling people which language was which, I sent them around for votes. I really liked the Tcl syntax and I thought it was going to do really well, but Python came back the winner. Even so, I kept researching for farther-flung alternatives and turned up a couple of others as well, although several of the embedded languages are pretty stale, dead, or haven't gotten past 0.0.1-pre-alpha. Of the haven't heard of it before languages, only one called Pike earned serious consideration. (Technically I had heard of its predecessor LPC, but only as a result of a misspent youth. :-) ) Pike and Python went head to head and, probably since our team is heavy with C++ programmers, Pike came out on top. So, we've started doing a proof-of-concept using Pike and we'll see how it goes. So far so good, and it's actually a pretty fun language to work with. -LM ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Embedded scripting language advice sought
For a project I'm working on, I need to find an scripting language, and I have a long wishlist: - able to be easily embedded in a C++ application - real object-oriented with inheritance (preferably multiple inheritance) - able to implement object methods in C++ where needed - sandbox operation (e.g. ability to suppress any file I/O system libraries, but keep math and string libraries) - thread-safe, or, at least able to have multiple coexisting execution contexts in one running process - relatively user-friendly syntax (i.e. (not (lisp (based - has to build and embed on FreeBSD This is a mathematical model, and the goal is to write certain high-performance parts in C++, but to provide the user a command-line style interface where they can explore interactively, examine/tweak data values, etc, and then override certain behavior by subclassing from the C++ base classes using the scripting language to see how it affects the next model iteration. One thread is handling the model calculations, and one handles the user's exploration, with appropriate synchronization when changes are made. (We are doing this already, but since the code is C++, only the data can be edited while it's running and inspection is limited to our hacky pseudo-language.) The obvious choice for this was Lua; it hits a lot of the marks, but not all of them and not all well. I got as far as creating a Lua object in C++ that exposes some core functionality, which is great, but when it comes to inheritance, and especially multiple inheritance, Lua's object model wasn't thrilling me. Also, it uses setjmp for error handling, which I'm worried will mess around with C++ exceptions; they are already fragile enough in threaded applications. I do like Lua, but I'd really rather find an embedded scripting language designed from the start to support OO, if one exists. Are there other alternatives I should look at? Lua is to C as __ is to C++? I tried to give Guile a look but a quick poll of the users vetoed the syntax. Lua is clearly ahead in the user-friendly department. I also wondered if Python would be a good choice, but I'm just not sure about how well it handles having new code generated more or less on the fly in the middle of a running application. I somewhat suspect that if it were done in Python, it would end up being a Python app with C++ add-ins, rather than a C++ app with an embedded scripting language. That isn't a deal-breaker, of course, as long as it works; results matter. That's not exactly lightweight though, and I'm not sure if (or how) Python sandboxes. One last wouldn't it be nice wish... If the user creates something they particularly like on the fly, compositing up an object a piece at a time on the command line, it would be just grand if the scripting language were able to reproduce a class definition for that arbitrary object that could be saved or tweaked for later reference and reuse. If not, we'll just have to abstract the editing process enough to keep one ourselves, which would probably be a bit user-unfriendly but hardly the end of the world. But with a wishlist this long and exotic, I'm afraid the question here is not whether something can do it all, but how disappointed I'm going to be. :-( I'm grateful for any language suggestions or feedback. Is Lua as close as we can get? Python? Other?! Thanks! -LM ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Local patches to ports?
Hello, We use Apache 1.3 on FreeBSD and for a long time, we have maintained our own build process separate from the ports collection because we have some local patches. These are accounting patches, of interest to no one but us, so I have no chance of getting anyone upstream to ever adopt them, but they are very important to us. After our last upgrade to 7-STABLE (7.1-PRERELEASE) our local build process started producing broken binaries but the port has patches and one of them makes it work. So, this seems like a good time to replace our build process with the ports collection. What's the best way to preserve our local patches and our custom configuration flags, and get them to apply to each new update of the port? Thanks! -LM ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Local patches to ports?
On Tue, Sep 9, 2008 at 3:58 PM, Greg Larkin [EMAIL PROTECTED] wrote: I would recommend setting up a local Tinderbox installation: http://tinderbox.marcuscom.com/ Wow, it looks like a lot of work, but if we can finally build everything in one place, with our local patches and then get portupgrade -PP to work reliably everywhere else, that would be worth the effort. I'll check it out! Thanks! -LM ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Runaway Apache
Hello, Can you tell me if anything was ever figured out with this thread? http://lists.freebsd.org/pipermail/freebsd-questions/2004-December/068462.ht ml I have a freebsd machine that is running apache version 1.3.33 and I am getting thousands of the message httpd in free(): warning: chunk is already free in my apache error log. Any idea? Linda http://rockymeadowhorses.com http://rockymeadowhorses.com/ http://emwh.com ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Link Suggestion for http://biterror.lo-res.org/fbsd/ipv6.html
Hi, My name is Linda, new webmaster of ipaddressworld.com, and I have been spending some time looking at your website at http://biterror.lo-res.org/fbsd/ipv6.html. It was an absolute pleasure visiting your site, and I found it linking to other Internet related sites but couldn't found our site. We at ipaddressworld.com would like to introduce you with this quality Website covering free Internet IP address lookup. It is for non-profit purpose and open for public to lookup their IP address. Please let me know if the above provides you with adequate information that you need to review and consider our website for linking. I can be reached via email at [EMAIL PROTECTED] Thank you for your time. OUR WEBSITES: TITLE: Free IP Address Lookup DESCRIPTION: What is your IP address? Free IP address lookup for all Internet connections. URL: http://www.ipaddressworld.com Html Code = a href=http://www.ipaddressworld.com;Free IP Address Lookup/apWhat is your IP address? Free IP address lookup for all Internet connections./p = End html = Thank you once again to support our public effort. Best wishes, Linda On Behalf of Free Public Project ipaddressworld.com Email: [EMAIL PROTECTED] ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Link Suggestion for http://doc.fugspbr.org/handbook/network-ipv6.html
Hi, My name is Linda, new webmaster of ipaddressworld.com, and I have been spending some time looking at your website at http://doc.fugspbr.org/handbook/network-ipv6.html. It was an absolute pleasure visiting your site, and I found it linking to other Internet related sites but couldn't found our site. We at ipaddressworld.com would like to introduce you with this quality Website covering free Internet IP address lookup. It is for non-profit purpose and open for public to lookup their IP address. Please let me know if the above provides you with adequate information that you need to review and consider our website for linking. I can be reached via email at [EMAIL PROTECTED] Thank you for your time. OUR WEBSITES: TITLE: Free IP Address Lookup DESCRIPTION: What is your IP address? Free IP address lookup for all Internet connections. URL: http://www.ipaddressworld.com Html Code = a href=http://www.ipaddressworld.com;Free IP Address Lookup/apWhat is your IP address? Free IP address lookup for all Internet connections./p = End html = Thank you once again to support our public effort. Best wishes, Linda On Behalf of Free Public Project ipaddressworld.com Email: [EMAIL PROTECTED] ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Link Suggestion for http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/network-ipv6.html
Hi, My name is Linda, new webmaster of ipaddressworld.com, and I have been spending some time looking at your website at http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/network-ipv6.html. It was an absolute pleasure visiting your site, and I found it linking to other Internet related sites but couldn't found our site. We at ipaddressworld.com would like to introduce you with this quality Website covering free Internet IP address lookup. It is for non-profit purpose and open for public to lookup their IP address. Please let me know if the above provides you with adequate information that you need to review and consider our website for linking. I can be reached via email at [EMAIL PROTECTED] Thank you for your time. OUR WEBSITES: TITLE: Free IP Address Lookup DESCRIPTION: What is your IP address? Free IP address lookup for all Internet connections. URL: http://www.ipaddressworld.com Html Code = a href=http://www.ipaddressworld.com;Free IP Address Lookup/apWhat is your IP address? Free IP address lookup for all Internet connections./p = End html = Thank you once again to support our public effort. Best wishes, Linda On Behalf of Free Public Project ipaddressworld.com Email: [EMAIL PROTECTED] ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
