similar to: testing techniques for checking the effectiveness of changes made to sch_gred.c

Hi, In the GRED queueing discipline of linux traffic control, we can define around 16 Virtual Queues with different RED parameters for each one of these. As far as I think, while applying RED on each of the virtual queues, with the grio option set, quave(the average queue length) of a virtual queue with priority= n is given by the sum of the virtual queues with priority greater than n ... I have

I want to implement a new queuing discipline for the tool tc. The new queuing discipline would support the application of multiple threads on the same queue with different kinds of traffic. Each kind of packet will have its own drop probability but while calculating the average queue length, the no. of packets in the queue will be equal to the sum of the individual no. of packets(of the different

Group, I am reading about tc (traffic control) and willing to get my feet wet. As requirement, there should be HTB compiled in the kernel. I grabbed a Mandrake 8.2 distro, and didn''t installed the kernel source. Anyone knows if the HTB is compiled in Mandrake 8.2, or point a way to find that out? I tried to read the /usr/src/kernel.xxxxx/.config file, but it doesn''t exists.

Hi all I have a trouble configuring the qdiscs, when I indicate the "perturb 10" option to tc, i gives me this error: tc qdisc add dev eth0 parent 5:1323 handle 1323 sfq perturb 10 RTNETLINK answers: Invalid argument if I don''t put the "perturb 10" option, it works. another question is about iptables, when I indicate the " --set-mark" option: iptables -t

Hello, We know, VQs are used in Gred to offer different schedulers, in order to make clear what the VQs are, I have read the sch_gred.c in net/sched/. In the function gred_enqueue(), at first it will find the VQ(q) according to the lower four bits of the skb->tc_index, then some parameters of the q is modified, such as q->packetsin and q->bytesin. At last the packet was put into the

Hi Yin, > To use select, usually, there is a compare before select. > Presence of comparison will disable some opportunities to > optimize some code. Select and Compare is not associative > neither. at the IR level LLVM already has pattern matching helpers for identifying min/max idioms, here is part of a transform using this, from InstructionSimplify.cpp: // Signed variants

There's not a lot of information about it. Basically we need 2 instruction scheduling passes -- one pre-RA and one post-RA. The prerequisites are "know how compilers work" and "have a GPU that you can test performance on". I won't beat around the bush - this is a very tough project. Every attempt at it so far has basically failed. There are a lot of issues that have to

Hello, Even I think it would be a very big project for just 3 months, but it would be fun learning and developing this. I feel I have the required skills and would like to learn more for this. I have just one doubt regarding the GPU required for the task. Will a normal NVIDIA GT 740m would be enough or we need better GPUs like Tesla or Quadro? In the latter case how can one proceed in case of its

Hi Duncan, Yes, exactly. However, we need define Opcode MIN/MAX Into ISDOpcodes.h. Do you like to add those two definitions Into the tree? Thanks, Yin -----Original Message----- From: Duncan Sands [mailto:duncan.sands at gmail.com] On Behalf Of Duncan Sands Sent: Tuesday, October 30, 2012 12:10 PM To: Yin Ma Cc: llvmdev at cs.uiuc.edu Subject: Re: [LLVMdev] Any plan to

hi all, i want to try htb3 with imq downloaded & patched imq & htb3 with kernel-2.4.18 on rh7.2 but got STUCK on step 1 :( this are what i did can anyone guide me what went wrong on the first step itself !! [root@cab1 root]# modprobe imq numdevs=1 modprobe: Can''t locate module imq [root@cab1 root]# [root@cab1 root]# tc qdisc add dev imq0 handle 1: root htb default 1 Cannot find

Hello all, I am trying to match some conections using u32 but I tryed this: [root@ns1 ~]# tc filter add dev eth1 parent 1:0 protocol ip prio 1 u32 match ip src 0/0 match ip dst 0/0 match ip sport 80 0xffff flowid 1:10 RTNETLINK answers: Invalid argument We have an error talking to the kernel [root@ns1 ~]# I have this class at device eth1: [root@ns1 ~]# tc class show dev eth1 class

Hi, I think a nice project would be to write an application to figure out those latencies automatically maybe even based on envydis. It could generate latency information based on thread count, register usage, instruction/instruction class, hw unit used. Or even tries to figure out what kind of units exist. Like instructions out of a group which are free to issue/execute after instructions out

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, Is there any grapical interface for the QoS (Quality of Service) Traffic Control in Linux ? Greetings. - --- Carles Xavier Munyoz Baldó carles@descom.es Descom Consulting Telf: +34 965861024 Fax: +34 965861024 http://www.descom.es/ - --- -----BEGIN PGP SIGNATURE----- Version: PGP 6.5.8

On 04.06.2015 22:18, Markus "Shorty" Uckelmann wrote: > Hi all, > > This might not be CentOS related at all. Sorry about that. > > I have lots of C6 & C7 machines in use and all of them have the default > swappiness of 60. The problem now is that a lot of those machines do > swap although there is no memory pressure. I'm now thinking about > lowering

On 06/05/2015 03:29 AM, Markus "Shorty" Uckelmann wrote: > some (probably unused) parts are swapped out. But, some of > those parts are the salt-minion, php-fpm or mysqld. All services which > are important for us and which suffer badly from being swapped out. Those two things can't really both be true. If the pages swapped out are unused, then the application won't

On Fri, Jun 05, 2015 at 12:29:04PM +0200, Markus "Shorty" Uckelmann wrote: > How can I further debug this > problem and find out what's the culprit? It's working as designed. Linux does not treat various kinds of memory pages differently. If you want a daemon to be fully in core, call mlockall(). Here's one way to do that without changing the daemon's source:

Am 05.06.2015 um 17:40 schrieb Greg Lindahl: > On Fri, Jun 05, 2015 at 12:29:04PM +0200, Markus "Shorty" Uckelmann wrote: > >> How can I further debug this >> problem and find out what's the culprit? > > It's working as designed. Sadly. It is just my first time I see this behaviour to this extent/on so many servers. So you can say that I'm kind of a

On 05.06.2015 19:47, Greg Lindahl wrote: > On Fri, Jun 05, 2015 at 09:33:11AM -0700, Gordon Messmer wrote: >> On 06/05/2015 03:29 AM, Markus "Shorty" Uckelmann wrote: >>> some (probably unused) parts are swapped out. But, some of >>> those parts are the salt-minion, php-fpm or mysqld. All services which >>> are important for us and which suffer badly

Everyone: If you work in Higher Education, in either an office of Institutional Research or an office Institutional Effectiveness, I'm keen to hear from you on how you use R, individually or with colleagues. Why do you use R? Is the cost savings an issue? Do you also maintain a license to more established packages (e.g., SPSS, SAS, or Minitab)? Are you encouraged (allowed?) to

On 06/05/2015 12:09 PM, Markus "Shorty" Uckelmann wrote: > Am 05.06.2015 um 18:33 schrieb Gordon Messmer: >> On 06/05/2015 03:29 AM, Markus "Shorty" Uckelmann wrote: >>> some (probably unused) parts are swapped out. But, some of >>> those parts are the salt-minion, php-fpm or mysqld. All services which >>> are important for us and which