On Mon, Mar 25, 2013 at 8:17 PM, valdis.kletni...@vt.edu wrote:
On Mon, 25 Mar 2013 17:23:40 -0700, Raymond Jennings said:
Is there some sort of mechanism that throttles the size of the writeback
pool?
There's a lot of tunables in /proc/sys/vm - everything from drop_caches
to swappiness
Hello All,
I was trying to search what happen when the kernel is being notified of
the incoming Frame.
I studied Chapter 10. Frame Reception Of Understanding Linux Network
Internals.
I only tells how the kernel is notified of the coming frame.
But what does the kernel does after it is being
On Mar 25 2013, valdis.kletni...@vt.edu wrote:
Just for the record, most of my high-performance stuff runs best with
the noop scheduler - when you're striping I/O across several hundred disks,
the last thing you want is some some single-minded disk scheduler re-arranging
the I/Os and
Hi,
Can you give me more references even linked videos.
You might want to take a look in section 6, Receiving a packet,
in Linux Kernel Networking (free 189 pages doc).
see:
http://media.wix.com/ugd//295986_4ef6dbdf11fd0a7f74f09741b4b5b2ee.pdf
(A shameless plug as I wrote it...)
rgs,
Rami
Hi All,
I was reading some stuff on interrupts and irq lines today and I thought I'll
expermient with the network rx path. To start with, I've a Virtual Machine
running 3.8 linux kernel. My machine has 4 CPU cores, network (eth) interface
is driven by pcnet_32 AMD driver and is tied to IRQ line
Hi Amit,
On Mar 26 2013, Kumar amit mehta wrote:
Hi All,
I was reading some stuff on interrupts and irq lines today and I thought I'll
expermient with the network rx path. To start with, I've a Virtual Machine
running 3.8 linux kernel. My machine has 4 CPU cores, network (eth) interface
Hi, Kumar,
1) Regarding rx queues: what does
ls /sys/class/net/eth0/queues
show ?
2) can you try setting affinity for working only with CPU3
and see what happens after some traffic is sent by
cat /proc/interrupts?
regards,
Rami Rosen
http://ramirose.wix.com/ramirosen
On Tue, Mar 26, 2013 at
On Tue, Mar 26, 2013 at 11:45:55AM -0700, Arlie Stephens wrote:
I don't know for sure what linux does, but the NICs I've seen with
multiple queues tend to select queues by hashing incoming packets
based on source IP, sourse port, destination IP, destination port and
(if TCP) protocol.
On Tue, Mar 26, 2013 at 08:35:56PM +0200, Rami Rosen wrote:
1) Regarding rx queues: what does
ls /sys/class/net/eth0/queues
show ?
$ ls /sys/class/net/eth0/queues
rx-0 tx-0
2) can you try setting affinity for working only with CPU3
and see what happens after some traffic is sent by
cat
Hi,
1) You can be sure that it does not use more than one rx queue.
You can find more info about RX queues in
http://media.wix.com/ugd//295986_4ef6dbdf11fd0a7f74f09741b4b5b2ee.pdf
(I wrote it, a shameless plug...)
2) Does the irqbalance service, which is common in some distros, is
running ?
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