Re: Variable download speed

2016-02-24 Thread sdrb
On Tue, 23 Feb 2016, Rick Jones wrote: On 02/23/2016 03:24 AM, s...@onet.eu wrote: Hi, I've got a problem with network on one of my embedded boards. I'm testing download speed of 256MB file from my PC to embedded board through 1Gbit ethernet link using ftp. The problem is that sometimes

Re: Variable download speed

2016-02-23 Thread sdrb
On Tue, 23 Feb 2016, Neal Cardwell wrote: On Tue, Feb 23, 2016 at 8:57 AM, wrote: I published example pcap file under following link: https://www.dropbox.com/s/v8375ub16seyt1a/test7.pcap?dl=0 I hope it is possible to download it without creating dropbox account. Thanks

Re: Variable download speed

2016-02-23 Thread Rick Jones
On 02/23/2016 03:24 AM, s...@onet.eu wrote: Hi, I've got a problem with network on one of my embedded boards. I'm testing download speed of 256MB file from my PC to embedded board through 1Gbit ethernet link using ftp. The problem is that sometimes I achieve 25MB/s and sometimes it is only

Re: Variable download speed

2016-02-23 Thread Neal Cardwell
On Tue, Feb 23, 2016 at 8:57 AM, wrote: > I published example pcap file under following link: > > https://www.dropbox.com/s/v8375ub16seyt1a/test7.pcap?dl=0 > > I hope it is possible to download it without creating dropbox account. Thanks for the trace. It looks like for the first

Re: Variable download speed

2016-02-23 Thread sdrb
On Tue, 23 Feb 2016, Neal Cardwell wrote: On Tue, Feb 23, 2016 at 6:19 AM, wrote: My question is: what causes such dynamic change in the window size (while transferring data)? Is it some kernel parameter wrong set or something like this? That sounds like TCP receive buffer

Re: Variable download speed

2016-02-23 Thread Neal Cardwell
On Tue, Feb 23, 2016 at 6:19 AM, wrote: > My question is: what causes such dynamic change in > the window size (while transferring data)? > Is it some kernel parameter wrong set or something like this? That sounds like TCP receive buffer auto-tuning (also called "Dynamic

Variable download speed

2016-02-23 Thread sdrb
Hi, I've got a problem with network on one of my embedded boards. I'm testing download speed of 256MB file from my PC to embedded board through 1Gbit ethernet link using ftp. The problem is that sometimes I achieve 25MB/s and sometimes it is only 14MB/s. There are also situations where the

Variable download speed

2016-02-23 Thread sdrb
Hi, I've got a problem with network on one of my embedded boards. I'm testing download speed of 256MB file from my PC to embedded board through 1Gbit ethernet link using ftp. The problem is that sometimes I achieve 25MB/s and sometimes it is only 14MB/s. There are also situations where the