similar to: [PATCH] packet delay scheduler

This patch updates the network emulation packet scheduler. * name changed from delay to netem since it does more than just delay * Catalin''s merged code to do packet reordering * uses a socket queue''s directly rather than layering on qdisc(fifo) because this is used in performance tests. * adds placeholder in API for future enhancements (rate and duplicate).

This enhances the network simulation scheduler to do simple random loss. The loss parameter is a simple 32 bit value such that 0 means no loss, and 0xffffffff is always drop. I have a new version of the tc command which takes care of conversion from percent to this value. Same patch for 2.4 and 2.6 Signed-off-by: Stephen Hemminger <shemminger@osdl.org> diff -Nru

If delay scheduler decides not to send the packet right away, it requeues it. If the requeue fails, it should go and look again rather than waking up prematurely. Same patch should apply to both 2.6 and 2.4 Signed-off-by: Stephen Hemminger <shemminger@osdl.org> diff -Nru a/net/sched/sch_delay.c b/net/sched/sch_delay.c --- a/net/sched/sch_delay.c 2004-06-17 15:19:07 -07:00 +++

The delay scheduler dequeue routine has some code cut&pasted from the TBF scheduler that caused a race with E1000 when ring got full. It looks like net schedulers should never be calling netif_queue_stopped because the queue may get unstopped by interrrupt or receive soft irq (NAPI) which races with the dequeue in the transmit scheduler. Also, if requeuing the packet fails, it is probably

Since it does not make much sense, then forbid this situation outright: - change qemuopts_end_arg_list() to return an error if the current arg list has no elements - when creating the argv array, assert that each arg list is not empty --- common/qemuopts/qemuopts.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/common/qemuopts/qemuopts.c

If underlying fifo enqueue fails, return the status not 0. Same patch should apply to both 2.6 and 2.4 Signed-off-by: Stephen Hemminger <shemminger@osdl.org> diff -Nru a/net/sched/sch_delay.c b/net/sched/sch_delay.c --- a/net/sched/sch_delay.c 2004-06-17 15:13:15 -07:00 +++ b/net/sched/sch_delay.c 2004-06-17 15:13:15 -07:00 @@ -69,7 +69,7 @@ sch->stats.bytes += skb->len;

Hi, I have a function that I'm writing. The arguments in the function are as follows RFF<-function(qtype, qOpt,...){} i.e., I have two args that are compulsary and the rest are optional. Now when my user passes the function call, I need to see what optional args are defined and process accordingly...what I have so far is.. RFF<-function(qtype, qOpt,...){ mc <-

Hello! I like to announce sch_ooo, a new queue discipline that, attached to a class (or a device, as root) reorder the packets that pass by delaying some. Example: tc qdisc add dev eth0 root ooo limit 100 gap 4 wait 1100 This queue will create a pfifo with limit 100 and will delay every 4th packet with 1100ms. An stream of 6 packets like this: 1 2 3 4 5 6, generated by ping will be reordered

I''m trying to setup a netem delay with no luck (using iproute2-2.6.8, compilation broke during arpd compile, so I use the tc binary in the tc/ subdir, there''s also a q_netem.so there). kernel is 2.6.8.1, compile with CPU cycle counter as time reference. I was using sch_delay of 2.6.7 happily with something like: tc qdisc add dev eth0 root 1: delay latency 1ms rate 35M now I use:

Fix one serious bug (in libnetlink), and a couple of other minor patches. http://developer.osdl.org/dev/iproute2/download/iproute2-051007.tar.gz Stephen Hemminger Reenable ip mroute Mike Frysinger Handle pfifo_fast that has no qopt without segfaulting Mads Martin Joergensen Trivial netem ccopts Jerome Borsboom Fix regression in ip addr (libnetlink) handling -- Stephen Hemminger

Currently we have an OCaml library for generating the qemu command line (used only by ‘virt-v2v -o qemu’). However we also generate a qemu command line in ‘lib/launch-direct.c’, and we might in future need to generate a ‘-readconfig’-compatible configuration file if we want to go beyond 10,000 drives for scalability testing. Therefore this patch series reimplements the qemu command line code as

Call realloc() directly with the pointer to the old data, instead of assigning it to the destination variable, and using that one. The rest of the code is the same, already properly checking for the results of realloc(), so this mostly help static code analyzers. --- common/qemuopts/qemuopts.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/common/qemuopts/qemuopts.c

Hi again, I was just looking around for ESFQ sources, and I see that the main site is down, and only has kernel 2.6.4 patches. Is ESFQ maintained? If so, where can I find patches for 2.6.10? Thanks, -justin _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/

Hello, I am attempting to use the LARTC traffic control to simulate a radio link that has variable bandwidth and availability. The basic bandwidth could be as low as 500 bits/sec but will generally be about 4000 bits/sec. If the simulated radio link is unavailable (zero bandwidth) then packets should be queued until a link is re-established. i.e. Initial bandwidth is 5000bits/sec then to 0

Since a couple of weeks we are experiencing occasional segmentation faults within Xapian 1.5. We can't reproduce the crashes, but we have strong hints that they are due to memory corruption. We have narrowed down our root cause analysis to phrase searches on multi-databases that fail on reading the `hint` field in the`QueryOptimiser`class [1]. We'd appreciate any hints on how to fix this.

Ryan Novosielski <novosirj at rutgers.edu> writes: > Hi there, > > I initially asked about this on r-help and was told this might be a better venue. I?m not really convinced from reading the posting guide, but I?ll give it a shot. It was also suggested that the R-Project doesn?t really care about building with ?non-standard? compilers, but I can?t find any evidence of that on the

Hello Can someone explane to me how the TCQ_F_THROTTLED flag and the watchdog function used in tbf and htb works? To be more specific, (reading tbf code) if there are not enough tokens, a watchdog timer will be "started" and the TCQ_F_THROTTLED flag set. But what happens then the time is up? where is the code reentered? What does the flag "really" mean? If someone could

From: Nikolay Ivanets <stenavin@gmail.com> I faced with situation where libguestfs cannot recognize partitions on a disk image which was partitioned on a system with "4K native" sector size support. In order to fix the issue we need to allow users to specify desired physical and/or logical block size per drive basis. It is definitely not a complete patch but rather a way to

Hi there, I initially asked about this on r-help and was told this might be a better venue. I?m not really convinced from reading the posting guide, but I?ll give it a shot. It was also suggested that the R-Project doesn?t really care about building with ?non-standard? compilers, but I can?t find any evidence of that on the website (indeed, there?s some mention of successful past builds, and the

This option was removed from qemu for no apparent reason except to break existing consumers. It does the same as -no-user-config, added in May 2012, so use that instead. --- builder/test-console.sh | 2 +- common/qemuopts/qemuopts-tests.c | 6 +++--- common/qemuopts/qemuopts.c | 2 +- contrib/p2v/build-p2v-iso.sh | 2 +-