Questions tagged [throughput]

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How to estimate download/enumeration times in large USB trees?

I'm doing a system design in which many flash-memory devices are connected into a USB tree of hubs, and I need to estimate how long it will take for them all to do a download ... which is complicated ...
Wayne's user avatar
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2 votes
1 answer
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Ethernet switch throughput

I'm not a network/hardware guy so please bear with me if I'm using the wrong vernacular in my question: My office recently upgraded our Internet from 50/10 Mbps to 150/20 Mbps. For this upgrade, we ...
Scott's user avatar
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WAP: Throughput & MU-MIMO

I have several questions related to the behavior & throughput of a WAP, hope you can guide me in the right direction or give me some insights. I have a WAP (Unifi nanoHD), which is mainly aimed ...
CVXDEV's user avatar
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qemu: emulated nic is too fast

On archlinux, I started a VM with qemu emulating a rtl8139 network card by giving it the following parameters: -device rtl8139,id=nic0,netdev=tap0 -netdev tap,id=tap0,ifname=tap0 After booting the ...
jan's user avatar
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How can throughput be greater than the bandwidth? Is this a valid reason?

I asked this question on networking engineers but it was closed as off topic since it wasn't for professional application. Hope it fits better here. I'm studdying for the CISSP secuirty exam and a ...
Celeritas's user avatar
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How do I optimize Windows disk I/O for high-latency throughput?

Let's say there are 25 processes each which want to read and index a large (say, 1GB) file. The hard drive may be capable of ~100MB/sec throughput, but the head movement and rotational latency ...
Charles Burns's user avatar
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1k views

2 port 10Gbe NIC Performance half of expected

I'm having trouble getting my expected throughput of a Intel dual port 82599EB 10-Gigabit. I've tried many things and want to know if there's anything I could try that I've missed. My hardware ...
Nate's user avatar
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Measuring Throughput of Remote Mounts

Is there a way to measure the throughput of say a remotely mounted sshfs share or samba share over openvpn in a linux environment?
Scandalist's user avatar
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Win7 -> Server 2008: Mapped drives take a long time to open

First, the configuration: I have a desktop and a laptop running Windows 7. I have a server running Windows Server 2008 Enterprise Edition. The workstation and server connect to the same Gigabit ...
tsilb's user avatar
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How does my spinning HDD reach 320 MB/s?

While creating an image of a (mostly empty) 1TB spinning hard disk, I was expecting a read speed of around 120 MB/s, and on the first blocks it was like that, but after that, most of the time it was ...
golimar's user avatar
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iperf3 asymmetric throughput on Dell PowerEdge T110 II

Dell PowerEdge T110 II server (Broadcom BCM5722 using tg3 driver, Intel(R) Core(TM) i3-2100 CPU @ 3.10GHz, Almalinux 8.5) has asymmetric iperf3 performance. When it is the server iperf3 tests at 940 ...
mathog's user avatar
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How to make AWS EFS work fast? (looks like a bug)

I am copying (by DataSync) from one EFS to another EFS (both Provisioned (1024 MiB/s)) at 14.57 MiB/s. Both systems are in the same subnet in the US. (Moreover, when I tried to change them back to ...
porton's user avatar
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Manipulating MTU size in IPTables with mangle for use with OpenVPN

I am looking for any and all pointers in regards to modifying or resetting MTU size with the mangle table in iptables. Specifically where in the iptables flow is it more efficient to modify MTU to ...
mcv110's user avatar
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Monitoring performance/throughput of USB-C

I've got a Lenovo laptop that supports USB type-c docking and I've got a Thunderbolt 3 docking station along. I know that this means that I'll only get the speed of USB 3.1 (gen 2). Hooking up two ...
Peter Lenkefi's user avatar
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1 answer
41 views

Poor throughput to the internet but just fine locally.

I have a router (Linksys E4200) connected to the internet (via external modem) and connected to a Powerline (AV500) device. I have 2 computers connected as follows: Modem <-- 1GbE --> Router &...
diolemo's user avatar
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Calculate the throughput of a processor in bits per second

Let's say for example you have an 64-bit 3.2 GHz processor with 8 MB of Cache. What is the theoretical and practical throughput as it would write to RAM (assuming there are no RAM bottlenecks)? Thank ...
Lee Sadler's user avatar
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1 answer
374 views

Throughput decreases after MTU 5000

I am trying to test throughput between two computers directly connected through 1 GbE and testing with iperf. I am getting a throughput around 980Mbps when MTU is between 5000 and 5050, however it ...
user3250247's user avatar
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1 answer
1k views

RDP ceases due to encryption error, but only over wifi

So I'm trying to figure out some problems I'm having with RDP. It fails repeatedly over wifi due with the message "Because of an error in data encryption, this session will end" It does not do this ...
Sidney's user avatar
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2 answers
862 views

TCP Throughput versus Packet Loss

How does the packet loss rate affect the TCP throughput rate: throughput rate reduce exponentially with respect to loss increase or throughput rate reduces by the same amount as loss increase?
arun's user avatar
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Puzzling network throughput behavior to my home

I wonder if anyone can suggest why I see this puzzling behavior: When downloading something large to my home (via Comcast), I get very slow throughput (e.g. 12 Mbits/s). Then, if I start a speed test ...
BobDoolittle's user avatar