Lieber Herr Winkler,
Die Zahlen klingen sehr gut! Verwenden sie noch den websocket code
von:
http://www.dcon.at/test/websockets/websockets.zip
Da im dem originalen code die "expr" nicht geschweifte Klammen
verwenden, werden die expressions nicht byte-kompiliert. Da es
gerade hier zahlreiche keine "low-level" operationen mit
Berechungen gibt, sollte die Byte-Code-Nutzung eine Verbesserung
darstellen.
Anbei die angepasste Version, am besten mit "diff -b" vergleichen
da mein Editor gleich an der Einrückung herumgedoktored hat...
gibt es gute test-beispiele, wenn ich das mal auf der eigenen
Instanz testen möchte?
-gn
Am 09.10.13 12:27, schrieb Wolfgang Winkler:
Dear Gustaf!
I tested the patch and it is working perfectly. Once again I'm
impressed with NaviServer.
I tested with 5200 websocket connections. Every 10 seconds each
connection sends a "still alive" message. Posting a 1000
character message from the server to all 5200 sockets takes
between 200 and 350 ms. The load on the server never exceeded
0.5 and typically hovers around 0.1.
best regards
Wolfgang
Am 2013-10-09 10:55, schrieb Gustaf Neumann:
Am 09.10.13 08:47, schrieb Wolfgang
Winkler:
Hello!
We are using websockets on naviserver. After connections are
established, we create a callback for the read event with
ns_sockcallback and push them in the background with ns_chan.
We hit a limit of exactly 100 connections, which went away,
when we commented out the ns_sockcallback call.
The problem is an invalid memory allocation. I've attached a
patch, which allows us to open much more connections, although
we still get a memory corruption at around 1000 connections,
somtimes more, sometimes less.
Dear Wolfgang,
many thanks for the patch. The allocation unit was clearly wrong
(number of entries vs. number of bytes); the same problem exists
as well in aolserver.
The proposed change has from my understanding 2 flaws
(a memory leak, and an underallocation when max is low
(e.g. 100) and the number of entries in the hash table is
high (e.g. 1000), then only 200 entries are allocated).
The second problem might be related to your still
existing problem,
Please check your code again with the following patch:
https://bitbucket.org/naviserver/naviserver/commits/c35cd3d2394e61dc55d4c3118d7a14a7a774cd52
best regards
-gustaf neumann
TCL is compiled with Gustaf Neumanns memory
allocator path. This is the backtrace with the linux standard
memory allocator
*** glibc detected *** /usr/local/naviserver/bin/nsd:
malloc(): memory corruption: 0x000000000b371b60 ***
======= Backtrace: =========
/lib/libc.so.6(+0x71e16)[0x7f9de5cf5e16]
/lib/libc.so.6(+0x74ead)[0x7f9de5cf8ead]
/lib/libc.so.6(__libc_malloc+0x70)[0x7f9de5cfac70]
/usr/local/lib/libtcl8.5.so(Tcl_Alloc+0x15)[0x7f9de64b8475]
/usr/local/lib/libtcl8.5.so(+0xafdf2)[0x7f9de652ddf2]
/usr/local/lib/libtcl8.5.so(+0x330de)[0x7f9de64b10de]
/usr/local/lib/libtcl8.5.so(Tcl_EvalEx+0x16)[0x7f9de64b1aa6]
/usr/local/naviserver/lib/libnsd.so(Ns_TclEvalCallback+0x12b)[0x7f9de6e4682b]
/usr/local/naviserver/lib/libnsd.so(NsTclTraceProc+0x1c)[0x7f9de6e4a60c]
/usr/local/naviserver/lib/libnsd.so(+0x5984a)[0x7f9de6e4a84a]
/usr/local/naviserver/lib/libnsd.so(+0x59c45)[0x7f9de6e4ac45]
/usr/local/naviserver/lib/libnsd.so(Ns_TclAllocateInterp+0x15)[0x7f9de6e4aef5]
/usr/local/naviserver/lib/libnsd.so(NsTclSockProc+0x42)[0x7f9de6e56eb2]
/usr/local/naviserver/lib/libnsd.so(+0x5250f)[0x7f9de6e4350f]
/usr/local/naviserver/lib/libnsthread.so(NsThreadMain+0x7e)[0x7f9de67a067e]
/usr/local/naviserver/lib/libnsthread.so(+0x5029)[0x7f9de67a1029]
/lib/libpthread.so.0(+0x68ca)[0x7f9de586a8ca]
/lib/libc.so.6(clone+0x6d)[0x7f9de5d53b6d]
We are running some test with the google allocator, but the
results are similar.
Wolfgang
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_______________________________________________
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--
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Institute of Information Systems and New Media
WU Vienna
Augasse 2-6, A-1090 Vienna, AUSTRIA
|
websockets.tcl
Description: Tcl script
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the latest Intel processors and coprocessors. See abstracts and register >
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