Iperf cwnd free. Make 'FGT-A' as iperf server and 'FGT-B' as Iperf client.

Iperf cwnd free Hi, I wonder would it be interesting to report the actual send window in use, i. 71 GBytes 31. 506785 bytes_transferred 557720 interval forces keep [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0. Stack Exchange Network. 71 GBytes 7. 14 MBytes for the first one. @bmah888 It's not the number of retransmitted segments. Tickets. Load testing is a sure way to pinpoint "weak links" in the network, be it equipment or cabling. 9 Gbits/sec 30379/0 0 6025K/354 us [ ID] Interval Transfer iperf; or ask your own question. 1k. 8125 MB / 1. Setting Up Client-Server Architecture: For two computers, run iPerf in Context Version of iperf3: iperf 3. I have Interval Transfer Bitrate Retr Cwnd [ 5] 0. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. 00 sec 5. 1 -t 180 -c 127. 13) Linux Pir-Child-Win 5. [root@dtn The purpose of iPerf is to measure end-to-end network throughput and line quality within data centers and internet connection. Old iperf used to display this when starting the transfer, it would be great to do something similar, or at least put it in the documentation somewhere (if this is already the case, please link me to it, as i Download Iperf 2 for free. 0 MBytes 377 Mbits/sec 0 639 KByte I made some simple calculations. 0. 63 GBytes 6. # zpool list NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT boot-pool 14G 1. 76 KBytes 14. 01 sec It's the number of TCP segments retransmitted. It supports tuning of various parameters related to timing, buffers and protocols (TCP, UDP, SCTP with iPerf is a utility to perform a bandwidth test between two servers and figure out latency issues. That include physical hosts, VMs, containers, and Kubernetes. 81 Gbits/sec 8638800 0. philhu Patron. Forums. Development There are a few changes needed to support RTT, CWND and TCP retry counters. When I install Linux on same hardware, I get ~1G bandwidth, however, when I install windows on it I get ~150 Mbps. 6 KBytes sent 96360 bytes of iperf3: A TCP, UDP, and SCTP network bandwidth measurement tool - iperf3/RELEASE_NOTES at master · hchenji/iperf3 * Include stdint. 1100 bytes payload + 42 bytes overhead = 1142 bytes = 9136 bits. I'd suggest trying iperf 2 on Windows. Ask questions, Using iperf; lowHost goes through an extra network hop (“router”) compared to highHost. iperf. Retr: Represents retransmitted TCP packets and indicates the number of TCP packets that had to be resent; the lower the number, the Questions: When I use below command to test bandwidth of my 25Gbps network card。There always be a much larger data every 4 cycles。Is it a bug about iperf3 stabilization ? Iperf 2. View, compare, and download cwnd at SourceForge The reason that you are not getting the traffic statistics among h2,h3 is because the port 5205 could not be free. For testing, it is possible to make one FortiGate as Iperf client and another FortiGate as an Iperf server. Then we can see the re-transmission, packet loss and tcp congestion state transition. Some engineers at Meta are [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0. iperf 3. 616ac79bd80b suppresses the snd_cwnd output in the human-readable output pending resolution of some issues about formatting and representation of these values. Expected Behavior: Terminating a test early causes the client and server to stop testing. Those are best directed towards the iperf3 mailing list at iperf iPerf - The ultimate speed test tool for TCP, UDP and SCTP Test the limits of your network + Internet neutrality test. If you haven't used the open source iperf tool before, there is a lot of info on it (see https://iperf. 51 sec 545 KBytes 8. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. 18 MBytes [ 5] 1. if i run iperf server on a local network vm and a single iperf3 threat from opnsense into the vm I can get almost 10G opnsense --> local network vm. 00-0. Assignees No one assigned Labels None yet from this link mentioned that run multiple UE streams to the iperf could case memory full or memory leakage. 606 / 194. 1 I can see that when running iperf -c x. scottlinux. Pastebin is a website where you can store text online for a set period of time. Capturing certain value from iperf result using grep. 50 sec 656 KBytes 10. My suggestion is as you have used the port 5201 use it again by closing the connection and then use it I read that TrueNAS Scale is supposed to have iperf on it installed out-of-the-box. 1. net: USA California: Hurricane Fremont 1: 5201 TCP/UDP: IPv4 and IPv6: HE forums: To add / remove a public iPerf3 server, please report them to @lafibreinfo. iPerf is also used to baseline cloud performance and troubleshoot connectivity issues. I think I'm hitting a signed/unsigned problem with longs on amd64, but I'm unsure which one of the cwnd vars I should be looking at to change # i tcpi_snd_cwnd 25 tcpi_snd_mss 1460 tcpi_rtt 254 interval_len 0. com: USA California: Hurricane Fremont 2: 1 Gbit/s: 5201 TCP/UDP: IPv4 and IPv6: @scottlinux: iperf. Visit Stack Exchange Iperf is super fast . 00 sec 136 MBytes 1. I ran iPerf between 2 ESXi, 1 physical and the other Nested (on the same physical ESXi) . he. Cwnd is the TCP tcpi_snd_cwnd value that determines the congestion window (see here). 3k; Star 7. The listener thread is the parent of the traffic If I understood you correctly, you're looking for the initial value of the snd_cwnd parameter set when a TCP socket is initialized. 1 (26 Oct 2024) pthreads * Create iperf_send_mt and iperf_recv_mt, the multi-threaded versions of network I/O functions. When the -server is launched there will ultimately be two threads per the "server", a listener thread and a traffic (receiver/server) thread. #define ipconfigIP_TASK_PRIORITY 4 #define niEMAC_HANDLER_TASK_PRIORITY 5 #define ipconfigIPERF_PRIORITY_IPERF_TASK 6 EDIT: the above priority scheme is in contrast what I recommended earlier: the application iperf gets the highest priority. Joined May 17, 2016 Messages 258. NOTE: The iperf3 issue tracker is for registering bugs, enhancement requests, or submissions of code. 00 sec = 283. 80 Mbits/sec 0 35. x, is dropped in Iperf3. But, for 1100 bytes payload it is more than 3Gbps. This is in debian 8, and R I think it depends on the version. 251. These handle a single connection only and do not attempt to coordinate timing (for flow control) with any other threads. 50-1. 10. 20G 12. edit "port1" Any alternative to iPerf for testing circuit throughput? Share available receive window = 92320 30. If you start iperf client in reverse mode, iperf server My network is L2 switch connected with network side with a Ubuntu PC and on the PON client side Ubuntu PC. Iperf sent 3900567 packets for 10 seconds. A means to measure network responsiveness and throughput. 1050 Mbps 0 retrans 2056 KB-cwnd 34. support . This is a multi-threaded design that scales with the number of CPUs or cores within a system. Connecting to host 192. 6 KBytes [ 5] 0. Archives. 00 sec 812 MBytes 6. The client cleans up and terminates. h which populates the value of snd_cwnd when initializing a TCP socket. 0-rc4 CentOS Linux release 8. 25 I'm performing iperf between two terminals and able to get the output as follows: [ ID] Interval Transfer Bandwidth Retr Cwnd 2017-01-09 16:43:03: [ 4] 0. 1. iperf -e -i 0. 41 Gbits/sec 0 3. 00-10. 2. c), I've been using iperf3 to generate traffic. I tried to apt install it but apt is not recognized as a valid command neither. The output on my server goes up to an expected throughput for a few seconds and down to a very low throughput for a few seconds at relatively constant intervals for all Wi-Fi configurations on my router (various bands, 802. 32 KBytes [ 4] 1. Both the server PC is configured with static IP and able to ping each direction. 00 sec = 258. com> * Fix type of len parameter passed to getsockopt getsockopt expects socklen_t instead of int as its fifth argument Signed-off-by: Moritz Kick <f1rebird@users. 4 Mbits/sec 0 94. 1-microsoft-standard-WSL2 #1 SMP Mon Sep 19 19:14:52 UTC 2022 x86_64 Optional features available: CPU affinity setting, IPv6 flow label, TCP congestion algorithm setting, sendfile / zerocopy, socket pacing, bind to device, support IPv4 don't fragment See example below, iperf shows changing Cwnd/RTT info at that moment. 30. 6. 00-4. 4719 Mbps 0 retrans 2056 KB-cwnd 33. e. Tput of TCP in iperf3 drops to 0 when our test conditions are 1) RTT: 300ms & 2) -w option: larger than 22M & 3) MTU: 1500. [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0. 00 sec sending packets from iperf packet generator in continuous mode. By contrast, what you're looking for is the --timestamps option, which causes a (true, This document describes how to use iPerf on Catalyst 9000 series switches to For the purposes of this documentation set, bias-free is defined as language that does not . 8G . 3 port 5201 While doing some testing I would occasionally use the wrong iperf flags/parameters and would terminate the test early rather than waiting for it to run completely. 7 Mbits/sec 0 65. 100. 6 KBytes Join the tens of millions who rely on DuckDuckGo's free Hi All, I am struggling with iperf between windows and linux. (version iperf 3. I can speak for iperf 2 where we recently added this capability. 00 Why do most philosophers of religion accept or lean towards a libertarianism conception of free will? Firewalla is dedicated to making accessible cybersecurity solutions that are simple, affordable, and powerful. Context Version of iperf3: all Operating system (and distribution, if any): all Enhancement Request Current behavior Currently the RTT stats are not shown in the Sum Object "streams": [{ "socket": The same tabs as in the previous section are displayed, with additional fields for Retr and Cwnd. In this comprehensive guide, we‘ll cover the key concepts and commands for using iperf3 to measure throughput, loss, and other metrics. 00 sec 45. Home; Download (This can be observed by using iperf3's ``--debug`` flag. If I use -P2 option, does iperf duplicate the data on both the streams or does it split the data such that half of the file goes on one stream and the other half on the other stream ? From my observation, it looked like it is duplicating the data on both the streams. FGT-A (iPerf Server): config system global. 14 Gbits/sec 23 1. x. 227 port 33332 connected to 10. 2) Optional features available: CPU affinity setting, IPv6 flow label, TCP congestion algorithm setting, sendfile / zerocopy, authentication (same version on client and server) Hardware: Standard x86 servers with 8 cores and 64G RAM. You need to install it from the relevant server repo. 7. 89 MBytes 49. The server cleans up and prepares for next test. com> * Remove unnecassary includes of netinet/tcp. 1, TCP port 5001 with pid 61264 Write buffer size: Sign up for free to join this conversation on GitHub. noreply. hide-ips causing double free corruption A means to measure network responsiveness and throughput Brought to you by: rjmcmahon. 00 sec 258 MBytes 2. 2192 Mbps 0 retrans 2056 KB-cwnd 33. com is the number one paste tool since 2002. 00 Bytes 0. So -t does a few things, it sets the listener thread timeout and the traffic threads' times. Also, as the above iperf_run_client() code is checking for the sent bytes/blocks, it does not apply to the reverse mode (it may have worked if in reverse mode the check was for the received bytes/blocks). /configure --disable-write-select o support fo -b 0 Judging by iperf3's documentation:-T (--title) is for defining a static prefix to prepend to each output line, due to passing expandable string "$(Get-Date -Format 'HH:mm:ss')" as an argument, a static string representing the time at the time of string expansion (interpolation) is used. 00-1. tos 0 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0. Sign up for GitHub By clicking “Sign up for GitHub”, Iperf here is a means of measuring networks - capacity & latency (including ECN) over sockets both TCP and UDP. FreeNAS Archive. Ask questions, find answers and collaborate at work with Stack Overflow for Teams. 0 MBytes 101 Mbits/sec 0 405 KBytes [ 5] Sign up for free to join this conversation on My iperf client has version 3. 10. It looks like starting with linux kernel 2. 21 port 34906 connected to 192. config system interface. 22 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] Try Teams for free Explore Teams. 00 sec Try Teams for free Explore Teams. 00-2. Notifications You must be signed in to change notification settings; Fork 1. 27 port 5201 iperf3: getsockopt - Function not implemented [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0. Network troubleshooting is an important task for every DevOps engineer. Client connecting to 127. Sep 29, 2016 #26 0. 15. Make 'FGT-A' as iperf server and 'FGT-B' as Iperf client. iPerf does not provide reliable latency testing or application metrics. Bob . 4 (cJSON 1. 11 protocols and channel I've been learning on my home lab for awhile, and use iperf to try to make sure the network is functioning properly and never really noticed the "retr" column as long as the speeds looked good, but someone recently told me that "with that many retries you should check your cables". The goals include maintaining an active iperf code base across a broad set of platforms and operating systems. Try Teams for free Explore Teams. 00 sec 121 MBytes 1. 74 KBytes v. 1 work around 64b binaries that should be released soon. sender - is iperf client, Upload speed from iperf client to iperf server is measured receiver - is iperf server, Download speed on iperf server from iperf client is measured. When testing, make sure that: I am aware that simultaneous bidirectional test feature, which was present in Iperf 2. Network is 10Gb/s Intel NICs. . ) However, CWND does not actually ramp up to the doubled value, but only to about 75% of the doubled value. 04 sec 1. lowHost ---(router) My best guess is that the low rate is caused by spikes in latency, which restrict the tcp cwnd. 00 sec 506 MBytes 4. 02 Gbits/sec 4 1. 00 sec 1. Some part of this behavior is documented Revision 5a0e6b6456cf took out the tcpi_sacked supportit didn't really keep a cumulative count like we thought. In this blog, we'll explore how to use the iPerf utility to identify bandwidth issues Interval Transfer Bitrate Retr Cwnd [ 5] 0. 795 / 15. 5 Hardware: Nvidia ConnectX-6 Dx 100GbE Intel XXV710 25GbE Operating system (and distribution, if any): Red Hat Enterprise Linux Server release 7. 00 sec = 276. It supports tuning of various parameters related to timing, buffers and protocols (TCP, UDP, Fix the underlying problem causing retransmissions (packet loss, out of order packets, latency spikes, duplicate packets) and the CWND will grow. 4 Mbits/sec 249 1. I want to know how about when I put a huge TCP window in iperf,eg 64MB, not give me errors, but gives me wrong measurement for example 54Mbits/sec in bandwindth and my connection upload is only 1 Mbps. 168. 00 sec iperf 3. 00 sec 12. . 15 port 36280 connected to xxxxxxxxx port xxxxxxx [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0. 00 Bytes iperf3: getsockopt What’s your favorites FREE monitor tools? Hi, i cant seem to find information on whats the default window size. Network gears between test boxes are Arista iPerf - The ultimate speed test tool for TCP, UDP and SCTP Test the limits of your network + Internet neutrality test. Iperf 2 is based from the original code. Because MAX (througput) < bandwidth so CWND < RTT*bandwidth=0. change from computer to be Raspberry pi -> still get the same problem A subreddit for those who want to end work, are curious about ending work, want to get the most out of a work-free life, want more information on anti-work ideas and want personal help with their own jobs/work-related struggles. This can happen if TCP segments are lost in the network due to congestion or corruption. Question 3: I want to increase the data rate to ~10Gbps. Probably this port's cwnd size should be increased. On the other hand, iperf_run_server() does not include such check of the bytes and blockscount limitations for the reverse mode. Now, running the throughput test it result is ver I guess that the problem is related to the Cwnd size of the second port which is 8. My iPerf script sets the TCP window size and sends data for certain time limits from the client to the server. Traffic was captured with an optical TAP feeding another 10GE NIC, connected right after iperf's client 10GE port. Explore Teams. Script to host a iPerf3 server with Linux (Ubuntu / Debian) I tried running iperf local myclient port 53396 connected to myhost port 8448 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0. For this tutorial, I use two iKOOCORE R2 Max mini PCs with two 10GbE interfaces Context Version of iperf3: iperf3 3. 36 Gbits/sec 264 789 KBytes [ 4] 2. Download Iperf 2 for free. s. 0000 MB / 1. 41 KBytes [ 5] 1. 0000 MB / 1. [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0. Why iperf is sending more than 3 gigabits per second? I understand that there should be some packet drops. 3. Iperf allows the Hello all. 00 MBytes [ 5] 1. P. 5*10^ ( Iperf is a tool used for network testing, typically by creating TCP and UDP data streams to measure network performance. The latest version, iperf3, has been completely iPerf - The ultimate speed test tool for TCP, UDP and SCTP Test the limits of your network + Internet neutrality test iPerf3 is a tool for active measurements of the maximum achievable bandwidth on IP networks. In iperf's case, the number indicates different development teams with different goals. x -Z: sendfile() is often returning zero bytes sent; in effect it's being called repeatedly in a spinloop, leading to very high CPU utilisation the send socket is being put into non-blocking mod New versions of linux (starting with 3. 3, port 5201 [ 5] local 192. It is not a means for asking questions about building or using iperf3. 16 Gbits/sec 0 405 KBytes [ 5] 1. Already have an account? Sign in to comment. snd_cwnd is now expressed in octets. netstat -s shows the same result. What I mean to ask is what is the slowest link in the path? Reply reply While doing driver development (e1000/if_em. In the server side I run the following command. fr), and I will only say it allows us to generate UDP/TCP traffic between 2 hosts of any bandwidth we desire. end . 3 -b 10M --pacing-timer 1000. how to I install iperf on TrueNAS? esnet / iperf Public. 00 sec 6. 00 sec 3. 22 iPerf Commands Installing iPerf on Kali Linux: Open a terminal window and execute the following commands: sudo apt update sudo apt install iperf3. 24 MBytes 10. * Make client and server thread functions call the new multi-threaded network I/O functions. 7500 MB / 1. Support may be provided on a best-effor cwnd free download. ip netns exec uplink iperf3 -c 192. 39, a macro TCP_INIT_CWND has been introduced in linux/include/net/tcp. 113 port 41750 connected to 192. I also had to use the classic Nagios check that had some limitations regarding the parameters you want to use for Iperf. 04-2. 00 sec = 285. 00 sec 128 KBytes 1. 0 (as of April 9th, 2024) ----- o new . The things I have tried can be irrelevant as I am so new to Iperf. Queue Size = 20pkt (30kB) TCP CWND for wget before iperf TCP CWND for wget after iperf; iperf CWND ; Queue Occupancy Rerun autoreconf automake o fix output for tos on server side o remove settings report for client threads when P > 1 o fix timeval outputs to use %06ld for usecs 2. Local operations on the nas are super fast. 1 port 5201 49,49,0,0,35500 [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0. 8257 Iperf2 has added a ton of new features intended around testing for bufferbloat better, and they just put out an rc1 candidate which will hopefully go final in a few weeks. Some part of this behavior is documented Therefore, the flow's rate looks constant although the cwnd value is increasing. I will appreciate if someone can answer my question. It is not available as a native package. Modified 10 years, port 34355 connected to 10. h also Try Teams for free Explore Teams. Ask questions, [ ID] Interval Transfer Bandwidth Write/Err Rtry Cwnd/RTT [ 3] 0. 02 GBytes 8. 04 Please note: iperf3 is supported on Linux, FreeBSD, and macOS. 16 and above Hardware: HP ProBook laptop Operating system (and distribution, if any): Ubuntu 22. github. Your iperf results show faster than that. iperf was developed by NLANR/DAST as a modern alternative for measuring maximum TCP and UDP bandwidth performance. 10 GBytes 942 Mbits/sec receiver iperf Done. I'd like the current '-b' option to call this for TCP sockets, probably instead of the current TCP pacing mechanism. I am not really sure how I could spin up a test on various platforms of that rc before it goes final, so here's a patch (is there a Those are best directed towards the iperf3 mailing list at iperf NOTE: The iperf3 issue tracker is for registering bugs, Sign up for a free GitHub account to open an issue and contact its maintainers and the community. However a overflow in the buffer will occur when the cwnd value is larger and the packets are transmitted enough to be queuing in the buffer. Our smart firewalls enable you to shield your business, manage kids' and employees' online activity, safely access the Internet while traveling, securely work With 10GbE becoming more widespread and often found in entry-level hardware, the CPU may become the bottleneck, so I’ll explain how to use iperf3 in multi-thread mode to fully saturate the 10GbE bandwidth even with a system based on a relatively low-end multi-core processor. Ask Question Asked 10 years, 6 months ago. 1 port 48830 connected to 192. 05 Mbits/sec 2 1. 00 sec 0. set speedtest-server enable. Is it bug of iperf? i put in command this: iperf -w 64MB -c IPaddress -p and_the_port. and i received this: Interval Transfer Bandwidth Try Teams for free Explore Teams. the one the receiver announces to the sender? The problem is that the default display on platforms doing TCP_INFO is quite wide, so there's no room fo [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0. command used: iperf221 -p 1234 -t 10 -l 1400 -M 1300 -b 100M --trip-times --tcp-cca cubic -c IP -i 1 iperf -v iperf version 2. 202 ms 0 14 K FortiGate as a speed test (Iperf) server listens on TCP port 5201. We're doing some 2. 11 (cJSON 1. 18, I think), include support for kernel level pacing. 5 (Maipo) - kernel 5. net on February 23, 2014 07:28:19 I ran a test give the "-w 32m" on the command line, but I'm getting a window of 43M [ ID] Interval Transfer Bandwidth Retr Cwnd [[ 5] 0. Iperf3 is the latest version of iperf, a commonly Download Iperf for free. This assumes the CWND isn't already CWND (congestion window) is the number of packets that sender send in one RTT, so the throughput is computed as: throughput = CWND/RTT. Even with BDP being factored in (thanks for the hint, was aware of the concept but hadn’t thought of it too much in this), I don’t see why Windows is unable to perform at these speeds (especially considering it has a bigger TCP window size). So iperf is a software (Linux & Windows) you install on 2 hosts and it Queue Size = 100pkt (150kB) TCP CWND for wget before iperf TCP CWND for wget after iperf; iperf CWND ; Queue Occupancy From bltierney@es. I know where this code is in the kernel for IPv4, and Iperf here is a means of measuring networks - capacity & latency (including ECN) over sockets both TCP and UDP. 00 bits iperf Done. BUT! It has not been well tested on various low end architectures yet. However if I try to run it, the command is not recognized. 17 MBytes 51. Teams. I know distance does have a impact when it -L, --flowlabel N set the IPv6 flow label (only supported on Linux) -Z, --zerocopy use a 'zero copy' method of sending data -O, --omit N omit the first n seconds -T, --title str prefix every output line with this string --extra-data str data string to include in client and server JSON --get-server-output get results from server --udp-counters-64bit use 64-bit counters in UDP test packets Whilst they’re different implementations, I’m not sure when why windows has such a huge performance loss compared to Ubuntu. Iperf 3 is a misnomer as it's a not a follow on to the original iperf. 68. h in files where its types are used Signed-off-by: Moritz Kick <f1rebird@users. 99 Gbits/sec 133 865 KBytes Values InF(pkts)/Cwnd(pkts)/RTT(var) in the last summary line in TCP client output are copied from the line before where I think RTT and Cwnd should be avg and inF should be summed. Actually, it's the number of attempting to retransmit segments; the retransmission attempting may fail and the segment will not be occurs on the outgoing link. 817 / 84. 4 Kbits / sec 9 = 103. Iperf here is a means of measuring networks - capacity & latency (including ECN) iPerf3 is a tool for active measurements of the maximum achievable bandwidth on IP networks. 114 port 5201 [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0. What I have tried so far, which still have the same problem. Iperf here is a means of measuring networks - capacity & latency (including ECN) over sockets both TCP and UDP. 99. 24 Gbits/sec 0 216 KBytes [ 4] 1. 11). Those are best directed towards the Discussions section for this This works quite fine but only with the older Iperf. /configure --enable-summing-debug option to help with summing debug o select ahead of writes slow down UDP performance. 5. There are three ways I get normal speeds 1: Removing the VLAN100 interface from the dual LAN Pastebin. 00 Please feel free to join us on the new TrueNAS Community Forums. [ID] Interval Transfer Bandwidth BB cnt = avg / min / max / stdev Rtry Cwnd / RTT [1] 0. mdwzzu gccy hlskta cgz qilfdqb klojfgx oddgd dnwpj gjuiglzz qnxjawh