[httperf] Why are responses limited to number of connections

Arlitt, Martin martin.arlitt at hp.com
Thu Mar 12 11:22:28 PST 2009


Hi Marcus

Is your server closing the connections after each response?

Martin


> -----Original Message-----
> From: httperf-bounces at napali.hpl.hp.com [mailto:httperf-
> bounces at napali.hpl.hp.com] On Behalf Of Marcus Clyne
> Sent: Monday, February 23, 2009 7:56 AM
> To: httperf at napali.hpl.hp.com
> Subject: [httperf] Why are responses limited to number of connections
> 
> Hi,
> 
> I've written a small custom-built HTTP server using libev.  I've tested
> it out using ab with the command
> 
> ab -n 10000 http://localhost:8002/url
> 
> and things work fine.  All 10k responses are returned with 2xx codes.
> 
> However, if I do
> 
> httperf --server=localhost --uri=/url --port=8002 --num-calls=10000
> 
> I get the following response:
> 
> httperf --client=0/1 --server=localhost --port=8002 --uri=/url
> --send-buffer=4096 --recv-buffer=16384 --num-conns=1 --num-calls=10000
> Maximum connect burst length: 0
> 
> Total: connections 1 requests 2 replies 1 test-duration 0.003 s
> 
> Connection rate: 310.1 conn/s (3.2 ms/conn, <=1 concurrent connections)
> Connection time [ms]: min 3.2 avg 3.2 max 3.2 median 3.5 stddev 0.0
> Connection time [ms]: connect 0.2
> Connection length [replies/conn]: 1.000
> 
> Request rate: 620.2 req/s (1.6 ms/req)
> Request size [B]: 63.0
> 
> Reply rate [replies/s]: min 0.0 avg 0.0 max 0.0 stddev 0.0 (0 samples)
> Reply time [ms]: response 2.5 transfer 0.5
> Reply size [B]: header 142.0 content 335.0 footer 0.0 (total 477.0)
> Reply status: 1xx=0 2xx=1 3xx=0 4xx=0 5xx=0
> 
> CPU time [s]: user 0.00 system 0.00 (user 0.0% system 124.0% total 124.0%)
> Net I/O: 182.6 KB/s (1.5*10^6 bps)
> 
> Errors: total 1 client-timo 0 socket-timo 0 connrefused 0 connreset 1
> Errors: fd-unavail 0 addrunavail 0 ftab-full 0 other 0
> 
> 
> Moreover, if I change the number of connections (e.g. --num-conns=5) the
> 2xx reply statuses show that number of responses.
> 
> I'm not quite sure what is happening, and what needs to be changed in my
> source code to get HTTPerf working properly.
> 
> Can anyone help, please?  Thanks in advance.
> 
> Marcus.
> 
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