"Eric Molitor" <[EMAIL PROTECTED]> wrote: > > Attached is a TCP Dump, SYS output was... > > tcpdump -i lo > debug.dump > tcpdump: verbose output suppressed, use -v or -vv for full protocol decode > listening on lo, link-type EN10MB (Ethernet), capture size 96 bytes > 31066 packets captured > 93658 packets received by filter > 459 packets dropped by kernel > > This was while debuging iteration over a list of 10 items. On such a simple > example on 2.6.14 it runs basically instantly. On 2.6.15 this took several > minutes. >
Thanks. The attachment was probably too large for the mailing list, so I've uploaded it to http://www.zip.com.au/~akpm/linux/patches/stuff/debug.dump.gz > > > On 3/6/06, Andrew Morton <[EMAIL PROTECTED]> wrote: > > > > [EMAIL PROTECTED] wrote: > > > > > > http://bugzilla.kernel.org/show_bug.cgi?id=6177 > > > > > > Summary: Java remote debugging is slow due to apparent > > networking > > > bug > > > Kernel Version: 2.6.15 > > > Status: NEW > > > Severity: normal > > > Owner: [EMAIL PROTECTED] > > > Submitter: [EMAIL PROTECTED] > > > > > > > > > Most recent kernel where this bug did not occur: > > > Distribution: Suse 10.0, Suse 10.1 Debian 3.1 > > > Hardware Environment: ix86 > > > Software Environment: 2.6.14 > > > Problem Description: > > > Sometime between 2.6.14 and 2.6.15 remote Java debugging has slowed to a > > > crawl. Users have reported the problem on both Debian, Suse. Downgrading > > to > > > 2.6.14 solves the problem. The problem occurs with IDEA IntelliJ, > > JBuilder, > > > and even the Sun JDAPI examples. I've talked with many people about this > > and > > > here is what is known so far. > > http://www.jetbrains.net/jira/browse/IDEA-6540 > > > The best quote to summerize that I know of is "tcpdump shows tons and > > tons of > > > packets going back and forth, none of which individually look strange, > > but the > > > fact that it took somewhere around the neighborhood of 2500 packets to > > open > > > the key/value for a single Hash element was weird. Each packet has a > > very > > > small payload of only a few bytes of information. (I will happily send > > the > > > tcpdump dump files if anyone wants.)" I know that this bug report sucks > > > because of the limited information but it is a real issue and somewhat > > hard to > > > provide a better test case. Eugene Zhuravlev [EMAIL PROTECTED] of IDEA > > > (IntelliJ's publisher) has offered to help track this problem down. > > > > > > Steps to reproduce: > > > Make sure you are running 2.6.15 or higher (occurs in 2.6.16 pre as > > well) > > > install Eclipse and start a remote debugging session. Downgrading to > > 2.6.14 > > > will cause the app to run at its normal speed. Its probably easiest to > > install > > > Tomcat and attach Eclipse to that. > > > > > > > Yes, if you can get the net guys a full tcpdump it would really help, > > thanks. > > > > (Please respond via email rather than via bugzilla so the > > non-bugilla-capable net developers get to see it, thanks ;)) > > > > > - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
