| Hi Rob,
The return code -100 is indicative of the server timing out while waiting for client to connect to its ephemeral port. Your client side message of "Unable to create connect socket." indicates the same too. There are probably some firewalls ?
Kavitha On May 23, 2012, at 2:41 PM, Rob Brown wrote: Thanks, that was helpful.I enabled max debugging and here is a snippet of the failed s2c part of the log:
[server] Starting s2c throughput test <-- 3671 - S2C throughput test -->
Send buffer initialized to 87380, Receive buffer initialized to 87380 -- s2c 3671 port: 3003 3671 waiting for data on testOptions->s2csockfd Finished reading pkt-pair data from network, process 3680 should terminate now
pcap_loop exited recvfrom: Bad file descriptor Pkt-Pair data collection ended, waiting for signal to terminate process Signal 17 received by process 3671 Timer expired while waiting for a new connection
Queue pointer=3671, testing=1, waiting=1, mclients=0, zombie_check=0 Waiting for new connection, timer running Timer expired while waiting for a new connection Queue pointer=3671, testing=1, waiting=1, mclients=0, zombie_check=0
Waiting for new connection, timer running S2C test failed with rc=-100 S2C throughput test FAILED!, rc=-100 Child 3671 returned non-zero (-100) from run_test() results some test failed!
[client] <-- S2C throughput test --> -- port: 3003
Send buffer initialized to 65535, Receive buffer initialized to 65535 Unable to create connect socket.
Connect() for Server to Client failed S2C throughput test FAILED! Protocol error - expected results! got ' 1', msgtype=2
On Tue, May 22, 2012 at 5:08 PM, Scott Bertilson <> wrote:
Might be worthwhile to try some number of "-d"s to see if you can get some useful hints (you can set the startup parameters in /etc/sysconfig/ndt and then do /etc/init.d/ndt restart):
[root@perfsonar-10g store]# web100srv --help
ANL/Internet2 NDT version 3.6.4 (server)
Basic options:
-a, --adminview - generate administrator view html page
-d, --debug - print additional diagnostic messages
Note: add multiple d's (-ddd) for more details
-h, --help - print help message (this message)
-m, --multiple - select single or multi-test mode
-o, --old - use old Duplex Mismatch heuristic
-q, --disable-queue - disable FIFO queuing of client requests
-r, --record - record client to server Web100 variables
-s, --syslog - use the syslog() to log some information
-t, --tcpdump - write tcpdump formatted file to disk
-v, --version - print version number
-x, --max_clients - maximum numbers of clients permited in FIFO queue (default=50)
-z, --gzip - disable compression of tcptrace, snaplog, and cputime files
Configuration:
-c, --config #filename - specify the name of the file with configuration
-b, --buffer #size - set TCP send/recv buffers to user value
-f, --file variable_FN - specify alternate 'web100_variables' file
-i, --interface device - specify network interface (libpcap device)
-l, --log Log_FN - specify alternate 'web100srv.log' file
-p, --port #port - specify primary port number (default 3001)
--midport #port - specify Middlebox test port number (default 3003)
--c2sport #port - specify C2S throughput test port number (default 3002)
--s2cport #port - specify S2C throughput test port number (default 3003)
-T, --refresh #time - specify the refresh time of the admin page
--mrange #range - set the port range used in multi-test mode
Note: this enables multi-test mode
-A, --adminfile #FN - specify atlernate filename for Admin web page
Note: this doesn't enable 'adminview'
-L, --log_dir DIR - specify the base directory for snaplog and tcpdump files
(default /usr/ndt/serverdata)
-S, --logfacility #F - specify syslog facility name
Note: this doesn't enable 'syslog'
Experimental code:
--avoidsndblockup - enable code to avoid send buffers blocking in the S2C test
--snaplog - enable the snaplog writing
--snapdelay #msec - specify the delay in the snaplog thread (default 5 msec)
Note: this doesn't enable 'snaplog'
--cwnddecrease - enable analyzing of the cwnd changes during the S2C test
Note: this automatically enables 'snaplog'
--cputime - enable the cputime writing
-y, --limit #limit - enable the throughput limiting code
Database support:
--enableDBlogging - enable the test results logging to the database
--dbDSN #dsn - specify the DSN to use (this doesn't enable DBlogging)
--dbUID #uid - specify the UID to use (this doesn't enable DBlogging)
--dbPWD #pwd - specify the PWD to use (this doesn't enable DBlogging)
IP family:
-4, --ipv4 - use IPv4 addresses only
-6, --ipv6 - use IPv6 addresses only
On Tue, May 22, 2012 at 6:47 PM, Scott Bertilson <> wrote:
http://psps.perfsonar.net/toolkit/FAQs.html#Q6
On Tue, May 22, 2012 at 6:40 PM, <> wrote:
Hi,
I am new to NDT, so bear with me. I have set up a server running the
netinstall of pS-Performance Toolkit, which includes NDT. I am trying the NDT
test but it is failing with the following message on the client:
Checking for middleboxes......Done.
Checking for firewalls......Done.
running 10s outbound test (client-to-server[C2S])......434.0kb/s
running 10s inbound test (server-to-client[S2C])......Server Failed while
receiving data
S2C throughput test FAILED!
I am testing across a VPN with pvt IPs and am fairly sure there are no
firewalls blocking anything, but it would be helpful to know what ports it is
trying to connect on, etc.
When I ran the test against a different (publicly available) NDT server, the
S2C test runs fine, so I don't think it's anything on the client side.
Is there a way to enable additional debugging to see what is going wrong?
I don't see anything useful in /var/log/ndt/web100srv.log
-- Rob Brown | Sr Systems Engineer | Rhapsody International Inc.
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