128 reputation
17
bio website unwindingchaos.com
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visits member for 2 years, 10 months
seen Nov 24 at 20:45

Sep
5
awarded  Popular Question
Feb
28
asked how to recover from a failed web server or reverse proxy
Jan
8
awarded  Notable Question
Jul
10
asked File copying over an already established ssh connection
May
9
awarded  Popular Question
Apr
24
comment how to check which CPU cores are serving rx queues for a particular NIC and if RPS is enabled
does irqbalance spread load over CPUs specified by smp_affinity or does irqbalance uses its own configuration and does not refer to smp_affinity
Apr
24
revised how to check which CPU cores are serving rx queues for a particular NIC and if RPS is enabled
added 749 characters in body
Apr
24
comment how to check which CPU cores are serving rx queues for a particular NIC and if RPS is enabled
does irqbalance limit itself to smp_affinity or can it override it?
Apr
24
comment how to check which CPU cores are serving rx queues for a particular NIC and if RPS is enabled
rhel 6.3 (2.6.x kernel)
Apr
24
revised how to check which CPU cores are serving rx queues for a particular NIC and if RPS is enabled
added 93 characters in body
Apr
24
asked how to check which CPU cores are serving rx queues for a particular NIC and if RPS is enabled
Apr
17
accepted Can IP Address be assigned to NIC connected with cross over cable
Apr
17
comment Can IP Address be assigned to NIC connected with cross over cable
+1 for referring to RFC1918. Thank you!!
Apr
17
asked Can IP Address be assigned to NIC connected with cross over cable
Jan
7
comment why 5 rx queues per NIC
Please correct if i am wrong, but my understanding is that TCP can poll queues. Consider a situation where socket's receive buffer is full. At that time, the driver will only publish data to the rx queues. When user empties the receive buffer and wants to read more data, the read system call can go all the way to rx buffers to receive it.
Jan
7
comment why 5 rx queues per NIC
I am assuming the 5 queues is a NIC specific feature as driver would have to be configured to publish to those 5 queues? Would such a driver be multi-threaded with one thread per queue? Also how does tcp learn to poll one queue vs 5 queues?
Jan
7
asked why 5 rx queues per NIC
Nov
6
comment Root cause behind increase in throughput
The most important thing to remember is that the client ONLY publishes message after RTT (i.e. after it receives an ACK from the server). So at any point in time, there is ONLY ONE packet in-flight. So, its highly unlikely that window size is changing(reducing in size). Also, both the hosts are on the same VLAN, with average CPU utilization of .1%. Also, as i said, when i run ping along with the client and server, there is 0 message loss
Nov
6
comment Root cause behind increase in throughput
I am on corporate network and it is a long process to get access to wireshark. meantime, i ran ping, along with the client and server and ping displays no message loss.
Nov
6
revised Root cause behind increase in throughput
added 117 characters in body