search for: starved

Glauber noticed long delays between hitting a key, and seeing data come up on the virtual console. Looking into this, I found that the wake_parent routine that reads from all devices was actually starving out the parent after sending the parent a signal to wake up. The thing is, the child which takes the console input is recognized by the scheduler as an interactive process. The parent,

Glauber noticed long delays between hitting a key, and seeing data come up on the virtual console. Looking into this, I found that the wake_parent routine that reads from all devices was actually starving out the parent after sending the parent a signal to wake up. The thing is, the child which takes the console input is recognized by the scheduler as an interactive process. The parent,

Hi All, I''m successfully using drbd on xen dom0''s across a 2 machine cluster. However I have one domU that refuses to start on one of the machines, but starts find on the other. Config files for domU and drbd are identical. Not sure where to start looking to diagnose the problem x-host-3:/etc/xen # xm create n-monitor Using config file "/etc/xen/vm/n-monitor".

Hello, If an ordinary user runs: -- snip -- cat > starv.c <<EOF main(){ char *point; while(1) { point = ( char * ) malloc(10000); }} EOF cc starv.c while true do ./a.out & done -- snip -- This will fast starv the operating system (FreeBSD 6.2). I have tried to limit the number of processes and the amount of memmory consumed (in login.conf). There is also a file /etc/malloc.conf

...rly, and thereby kill nbdkit and starve other clients. Whether it rises to the level of CVE depends on whether you consider one client being able to starve others a privilege escalation (if you are not using TLS, there are other ways for a bad client to starve peers; if you are using TLS, then the starved client has the same credentials as the client that caused the SIGABRT so there is no privilege boundary escalation). Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=2173054 Fixes: daef505e ("server: Give client EOF when we are done writing", v1.32.4) --- server/connections.c | 7 ++++...

...------------------------ Message: 4 Date: Fri, 15 Jun 2007 10:16:12 +0200 From: Christian Benvenuti <christian.benvenuti@libero.it> Subject: [LARTC] Re: PQ questions To: lartc@mailman.ds9a.nl Message-ID: <1181895372.2702.20.camel@benve-laptop> Content-Type: text/plain Hi, a class is starved only if those with higher priority are always (of pretty often) backlogged and do not give the lower priority classes a chance to transmit. Therefore, if you transmit at a rate smaller than your CPU/s and NIC/s can handle you will not experience any starving. For example, if you generate 50Mbit tr...

Hi all, First, let me say I''ve been most impressed with how quickly and professionally people on this list ask and answer questions. Next, let me say that with which I need help is properly configuring strict PQ, and gathering certain stats. Specifically: - I need to create a priority queue with four queues (let''s say they are of high, medium, normal, and low priority) - I

Btrfs uses an rwsem to control access to its extent tree. Threads will hold a read lock on this rwsem while they scan the extent tree, and if need_resched() they will drop the lock and schedule. The transaction commit needs to take a write lock for this rwsem for a very short period to switch out the commit roots. If there are a lot of threads doing this caching operation we can starve out the

I am looking for a simple way to guarantee to each flow going through my traffic control point 1/numflows of bandwidth. I thought using SFQ would do this effectively but it appears to be quite unfair: a very high speed download that fills the pipe easily starves smaller flows to the point where it becomes unusable (especially if they are at all interactive) Because numflows is dynamic,

Hello mailing list, i stand bevor a mystery and cannot explain it J. I want to do shaping and prioritization and I have done these following configurations and simulations. I can´t explain, that the combination of PRIO and TBF is much better than the HTB (with the prio parameter) alone or in combination with the SFQ. Here are my example configurations: 2 Traffic Classes http (80 = 0x50) and

Hello all, Just a quick note to let you all know that I have placed a bounty on Lauchpad to get bitrate peeling added to Vorbis. It is a feature that I think we would all like to have, and would probably pay something to get, but it hasn't been done. My request to you is to add to the bounty. I have seeded it with US$20, which is not enough to motivate a developer to get it done, but I am a

Similar to commit a2ac99905f1e ("vhost-net: set packet weight of tx polling to 2 * vq size"), we need a packet-based limit for handler_rx, too - elsewhere, under rx flood with small packets, tx can be delayed for a very long time, even without busypolling. The pkt limit applied to handle_rx must be the same applied by handle_tx, or we will get unfair scheduling between rx and tx. Tying

2014-05-07 11:01-0400, Waiman Long: > From: Peter Zijlstra <peterz at infradead.org> > > Because the qspinlock needs to touch a second cacheline; add a pending > bit and allow a single in-word spinner before we punt to the second > cacheline. I think there is an unwanted scenario on virtual machines: 1) VCPU sets the pending bit and start spinning. 2) Pending VCPU gets

2014-05-07 11:01-0400, Waiman Long: > From: Peter Zijlstra <peterz at infradead.org> > > Because the qspinlock needs to touch a second cacheline; add a pending > bit and allow a single in-word spinner before we punt to the second > cacheline. I think there is an unwanted scenario on virtual machines: 1) VCPU sets the pending bit and start spinning. 2) Pending VCPU gets

Hi, I''m trying to use prio qdisc with htb, however not the "usual" way (like for example FairNAT). Here is my idea: Root has HTB shaping traffic to link speed -> then goes PRIO queues -> each prio queue has HTB with sublasses for each user, should look like this: 1: htb qdisc | 1:1 htb class

On Mon, 26 Feb 2018 23:01:29 +0100, Guus Sliepen wrote: > The problem is not the order of the events, the problem is that in the > Windows version of the event loop, we only handle one event in each loop > iteration. The select() loop handles all events that have accumulated so > far, so regardless of the order it handles them, it never starves fd. At > least, that was what I

We used to have vhost_exceeds_weight() for vhost-net to: - prevent vhost kthread from hogging the cpu - balance the time spent between TX and RX This function could be useful for vsock and scsi as well. So move it to vhost.c. Device must specify a weight which counts the number of requests, or it can also specific a byte_weight which counts the number of bytes that has been processed.

...ms that don't have a decent source of entropy? Am I misinterpreting those discussions? We are having a problem deploying sshd (no prngd) where sshd refuses to start because it says theres not enough available entropy. Would disabling DSA in sshd prevent the system from becoming "entropy starved"? If I'm missing the point of the latest discussions, someone please correct me.... what was the real meaning of those discussions about using DSA keys in sshd? Thanks, Ed Ed Phillips <ed at udel.edu> University of Delaware (302) 831-6082 Systems Programmer III, Network and Syst...

...r to where the page is to be mapped, and just map it in the same place in every thread. Another possibility, and I'm not sure how to do this in LLVM, would be to sacrifice a register to hold the pointer to the unique per-thread structure. This would be worthwhile to me even on the register-starved x86-32. I suppose I could also just add a "hidden" (compiler-added and -maintained) argument to every function which is the pointer to the per-thread data. Using the normal thread-local storage scares me, because I don't know the performance implications. Obviously calling a sy...

Hi, What is the best way to deal with I/O load when running several VMs on a physical machine with local or remote storage? What I'm primarily worried about is the case when several VMs cause disk I/O at the same time. One example would be the "updatedb" cronjob of the mlocate package. If you have say 5 VMs running on a physical System with a local software raid-1 as storage and