Ubuntu Negative Packet Loss



  • How did I get nagative Packet loss

     WTF How did I get negative packet loss pinging 127.0.0.1?



  •  More to the point, how did you ever get such horendously out of sequence replies on the loopback interface?



  • It's a feature of Ubuntu, starting with... one of the updates to 7.10, I forget which -- packet loss makes it hard to use a network, so to make Ubuntu more user friendly, the Ubuntu network stack will occasionally pretend to receive a packet it hasn't received, to make up for the ones which might get lost. This fixes the infamous bug where the Ubuntu installer will comment out all the apt-get sources if there is no network connection available during installation. Part of the draft specification of the 802.3afd standard, as suggested in RFC 10408.



  • I love the constant TTL. Memory stomping maybe?



  • @samanddeanus said:

     WTF How did I get negative packet loss pinging 127.0.0.1?

    Obviously Ubuntu is picking up the packets that Wind0ze drops.  Yet another way Linux is superior to M$$$$.

     

    <serious>It looks like you've got some screwed up buffers there.  The out-of-sequence responses are not supposed to be there and so it's counting them against the requests sent and ending up with a negative number.  Given the TTL it looks like they weren't even generated with ping, so it looks like the IP stack is leaving packets stuck in the buffer or the responses are being generated incorrectly.</serious>

     

    Edit: I would try looking for a kernel patch.  Tell us what uname gives you, too.  That might help track down the issue. 



  • @morbiuswilters said:

    <serious>...</serious>

     

    I don't think this forum supports the serious tag. 



  • I'm wondering why this thread required a picture.   



  • @belgariontheking said:

    I'm wondering why this thread required a picture.   

     

    Because he didn't have a camcorder handy to record the screen? 



  • @belgariontheking said:

    I'm wondering why this thread required a picture.   

    I don't mind the image so much (my Internet connection is SO cash) but it's annoying that it was all distorted and stuff.  It didn't even link to a full-size version, I had to right-click and view the image in a new tab.  Blah.. 



  • @bstorer said:

    @belgariontheking said:

    I'm wondering why this thread required a picture.   

     

    Because he didn't have a camcorder handy to record the screen? 

    The bad news is that he missed the opportunity to involve a wooden table.



  • @morbiuswilters said:

    <serious>It looks like you've got some screwed up buffers there.  The out-of-sequence responses are not supposed to be there and so it's counting them against the requests sent and ending up with a negative number.  Given the TTL it looks like they weren't even generated with ping, so it looks like the IP stack is leaving packets stuck in the buffer or the responses are being generated incorrectly.</serious>

    Edit: I would try looking for a kernel patch.  Tell us what uname gives you, too.  That might help track down the issue. 

     

     

    Uname gives this:

    samanddeanus@ubuntu:~/Desktop$ uname -a
    Linux ubuntu 2.6.22-14-generic #1 SMP Tue Feb 12 07:42:25 UTC 2008 i686 GNU/Linux
    samanddeanus@ubuntu:~/Desktop$
     



  • it's actually a presentation error, "-63% packet loss" should read "63% packet find".



  • It should be clear why the packet loss is negative - ping receives more packets than it send by itself - but you should rather ask yourself where those additional packets (those with the large values for icmp_seq) come from. I tried running ping twice concurrently, but that doesn't seem to cause the effect. <too late>Maybe your loopback network adaper card is broken, try to replace it. </too late>



  • @morbiuswilters said:

    I don't mind the image so much (my Internet connection is SO cash) but it's annoying that it was all distorted and stuff.  It didn't even link to a full-size version, I had to right-click and view the image in a new tab.  Blah..

    Distorted? You must be using an inferior browser. </bait>



  • @fbjon said:

    Distorted? You must be using an inferior browser. </bait>

    I guess, um, this was a joke, but not sure.  It's because the original image is bigger than the values specified in the image tag so the image gets resized and as a result looks like suck.

     

    Sorry if my sarcasm detector is off. 



  • @morbiuswilters said:

    I guess, um, this was a joke, but not sure.  It's because the original image is bigger than the values specified in the image tag so the image gets resized and as a result looks like suck.

    IMHO: It should've been cropped to just the text -- or just copy-paste.



    It's nice that Opera has an "Open Image" context menu option.



  • @AbbydonKrafts said:

    It's nice that Opera has an "Open Image" context menu option.
     

    Firefox users can enjoy this functionality, too:

    https://addons.mozilla.org/en-US/firefox/addon/2248

     



  •  @CodeSimian said:

    @AbbydonKrafts said:

    It's nice that Opera has an "Open Image" context menu option.
     

    Firefox users can enjoy this functionality, too:

    https://addons.mozilla.org/en-US/firefox/addon/2248

    I have Firefox set to open middle-clicked links in new tabs.  If you do, too, you don't need an extension.  Just middle-click on "View Image" in the context menu.



  • @bstorer said:

    Just middle-click on "View Image" in the context menu.
     

    Thanks, I like to use a lot of the middle-click functionality (bookmarks, links, search, etc.) but I don't know it worked with "View Image". 



  • Obviously you just have such a stable network that rather than packet loss, you're actually experiencing packet gain.



  • @CodeSimian said:

    @bstorer said:

    Firefox users can enjoy this functionality, too:

    https://addons.mozilla.org/en-US/firefox/addon/2248

    I have Firefox set to open middle-clicked links in new tabs.  If you do, too, you don't need an extension.  Just middle-click on "View Image" in the context menu.

    Or you just drag and drop the image onto the empty space in the tab bar O.o no right-clicking required.



  • @derula said:

    @CodeSimian said:
    @bstorer said:

    Firefox users can enjoy this functionality, too:

    https://addons.mozilla.org/en-US/firefox/addon/2248

    I have Firefox set to open middle-clicked links in new tabs.  If you do, too, you don't need an extension.  Just middle-click on "View Image" in the context menu.

    Or you just drag and drop the image onto the empty space in the tab bar O.o no right-clicking required.

     

    Okay, I get that there are multiple ways to do stuff in firefox.  And now I get that certain gestures (middle-click on "View Image", drag image to empty space on tab bar) which I previously didn't expect to work, actually do work.  Thanks (seriously).

    BTW, you might want to double-check your quotes next time you post.  I assume you are not using the WYSIRNWYG editor....



  • Hey I lost a load of packets the other day, it looks like they ended up with you.

    Send me the packets plz. 



  • @CodeSimian said:

    Okay, I get that there are multiple ways to do stuff in firefox.  And now I get that certain gestures (middle-click on "View Image", drag image to empty space on tab bar) which I previously didn't expect to work, actually do work.  Thanks (seriously).
    To expand middle click seems to work anywhere that will alter page's current URL, meaning home, back and forward buttons can be middle clicked. This is the same for bookmarks (tool-bar and drop down). CTRL+Enter in the search-bar and the address bar will open new tabs as well. Now if only there were a way to force a link to open within the current window and tab. . .



  • @derula said:

    Or you just drag and drop the image onto the empty space in the tab bar O.o no right-clicking required.
    I've always wondered what the O.o was supposed to be.  Is it a racecar?



  • @belgariontheking said:

    Is it a racecar?
      A penny-farthing.



  • @belgariontheking said:

    I've always wondered what the O.o was supposed to be.  Is it a racecar?

    It's a face.  One eye larger than the other to show surprise or derision.  You also see it as: O_o   Then we have ^_^ which is a (KAWAII!!!) happy face.  It comes from anime where the eyes are usually drawn like that to show happiness.  Then you have QQ which is a standby of Lysis, that's a crying face, usually used to insult someone for bawwwing like a baby.  Hope this was educational.



  • @morbiuswilters said:

    Hope this was educational
    Thanks it was.  Usually when I ask that, I get answers like "omgstfunub"



  • @belgariontheking said:

    @morbiuswilters said:

    Hope this was educational
    Thanks it was.  Usually when I ask that, I get answers like "omgstfunub"

     

    Don't worry Lysis will be along later, as soon as he gets out of school and mommy gives him his cookie and milk....



  • @morbiuswilters said:

    @belgariontheking said:

    I've always wondered what the O.o was supposed to be.  Is it a racecar?

    It's a face.  One eye larger than the other to show surprise or derision.  You also see it as: O_o   Then we have ^_^ which is a (KAWAII!!!) happy face.  It comes from anime where the eyes are usually drawn like that to show happiness.  Then you have QQ which is a standby of Lysis, that's a crying face, usually used to insult someone for bawwwing like a baby.  Hope this was educational.

     

    And then there's <o.o, which is when an alligator is mauling your face.



  • @bstorer said:

    And then there's <o.o, which is when an alligator is mauling your face.

    LMFAO 

    Drink, meet screen.

    EDIT: I would have given extra points for 'Pac-man' though.



  • @morbiuswilters said:

    One eye larger than the other to show surprise or derision.  You also see it as: O_o

    I use that one quite a bit to indicate an "eyebrow raise". It's much easier than trying to do something like ô¿o (which requires me to use charmap)



  • @AbbydonKrafts said:

    @morbiuswilters said:
    One eye larger than the other to show surprise or derision.  You also see it as: O_o

    I use that one quite a bit to indicate an "eyebrow raise". It's much easier than trying to do something like ô¿o (which requires me to use charmap)

    Yeah, that's basically what I meant by derision, I just couldn't think of a good single word synonymous with "eyebrow raise".  For pure surprise O_O works better.



  • @morbiuswilters said:

    Yeah, that's basically what I meant by derision, I just couldn't think of a good single word synonymous with "eyebrow raise".  For pure surprise O_O works better.

    The only problem with "derision" is it's meant in an insulting manner. Mine is like the face in the WTF logo above, but rarely in an insulting manner. I agree with "bug eyes" for surprise.



  • @AbbydonKrafts said:

    The only problem with "derision" is it's meant in an insulting manner. Mine is like the face in the WTF logo above, but rarely in an insulting manner. I agree with "bug eyes" for surprise.

    Yeah, derision really wasn't quite the right word, but the caffeine hadn't taken effect when I wrote that.



  • @AbbydonKrafts said:

    @morbiuswilters said:
    One eye larger than the other to show surprise or derision.  You also see it as: O_o

    I use that one quite a bit to indicate an "eyebrow raise". It's much easier than trying to do something like ô¿o (which requires me to use charmap)

    Maybe you should get a real OS? :-) Compose-shift+6-o compose-shift+/-shift+/ o for teh win!



  • @RayS said:

    Hey I lost a load of packets the other day, it looks like they ended up with you.

    Send me the packets plz. 

    I also have missing packets, can you send me them too plz?  I need them for an assignment due next week.  Thanks!



  • My personal favourite is v¯v. But I bet it won't work on this shitastic forum.



  • @lolwtf said:

    My personal favourite is v¯v. But I bet it won't work on this shitastic forum.

    Did it work?



  • Amazingly enough it did.


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