when MAX_BURST_SIZE is 32, if I send a burst of 32 packets or
larger, then I get around 10 usec of latency. When the burst size is less
than 32, I see higher average latency, which make total sense."
On Mon, May 26, 2014 at 9:39 PM, Jun Han wrote:
> Thanks a lot Jeff for your detailed e
Hi all,
I've also asked a similar question on the previous thread, but I'll copy it
here for better visibility. I would really appreciate it if you can provide
some hints to my question below. Thanks a lot!
Thanks a lot Jeff for your detailed explanation. I still have open question
left. I would
Thanks a lot Jeff for your detailed explanation. I still have open question
left. I would be grateful if someone would share their insight on it.
I have performed experiments to vary both the MAX_BURST_SIZE (originally
set as 32) and BURST_TX_DRAIN_US (originally set as 100 usec) in l3fwd
main.c.
Hi all,
I measured a roundtrip latency (using Spirent traffic generator) of sending
64B packets over a 10GbE to DPDK, and DPDK does nothing but simply forward
back to the incoming port (l3fwd without any lookup code, i.e., dstport =
port_id).
However, to my surprise, the average latency was aroun
I have a question regarding rte_rdtsc_precise() function. I was not getting
an expected number from the normal rte_rdtsc(), and hence changed to
rte_rdtsc_precise() function and am getting a different value, which seems
to be producing a number close to my expectation.
Q1. However, I wanted to ask
Hi all,
I've been trying to measure possible performance penalties of performing
LPM table lookup on l3fwd code (as opposed to a simple forwarding without
lookup, i.e., forwarding back to the ingress port).
I perform two sets of experiments -- (1) generate a fixed dst IP address
from DPDK pktgen;
Hi
I have a quick question about using your DPDK pktgen. I want to
sequentially increase the destination IP address so I modified the .lua
file in the following way. However, as I am printing the contents of IP
header in the other machine, I find that the IP address does not keep
incrementing all
Hi all,
I have a quick question regarding the performance of DPDK l2fwd (Same
problem with l3fwd). I am seeing that when we start multiple ports (e.g.,
12 ports), for 64 byte packets, the RX rate is only at around 11 Mpps per
port, instead of 14.88 Mpps which is the line rate (with preablem+start
Hi all,
I have been trying to add more IPv4 table entries by appending random
entries in the ipv4_l3fwd_route_array as the following:
*static struct ipv4_l3fwd_route ipv4_l3fwd_route_array[] = { *
*{IPv4(1,0,0,0), 24, 0}, *
*{IPv4(1,0,4,0), 22, 0}, *
*{IPv4(1,0,4,0), 24, 0}, *
*{IPv4(1,0,5,0), 24
Hi Michael,
We are also trying to purchase an IXIA traffic generator. Could you let us
know which chassis + load modules you are using so we can use that as a
reference to look for the model we need? There seems to be quite a number
of different models.
Thank you.
On Tue, Jan 28, 2014 at 9:31 A
Hi all,
Does anyone know if there is a way to measure the round trip latency
between pktgen and l2fwd? If not, is there a way to add timestamps to
measure latency? Our current setup is: Machine A runs DPDK pktgen and is
connected back-to-back with Machine B running l2fwd.
Thank you.
Jun
Hi,
Does anyone know if there is a DPDK provided tool to measure latency of a
packet traversal (i.e., when a packet is copied from the NIC to userspace)?
Also, we are using rdtsc to measure processing delay in the userspace
currently, but does anyone else have suggestions/experiences for other
too
Hello,
We are trying to benchmark L3FWD application and have a question regarding
the IP lookup algorithm as we expect the bottleneck to be at the lookup.
Could someone let us know how efficient the lookup algorithm that L3FWD is
using (e.g, LPM)? We are asking because we want to obtain highest L3
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