Thread View: comp.protocols.tcp-ip
1 messages
1 total messages
Started by Jan-Piet Mens
Fri, 05 Feb 1993 16:35
TCP/IP slowing down on SCO
Author: Jan-Piet Mens
Date: Fri, 05 Feb 1993 16:35
Date: Fri, 05 Feb 1993 16:35
195 lines
10152 bytes
10152 bytes
Hello Netlanders!
I have terrible trouble with a large file server running SCO Unix 3.2.4
and SCO TCP 1.1.3f w/ NFS 1.1.1d.
Telnet, and rlogin work fine, both tested from several clients running
DOS or Unix (incl. other Unices), and seem to perform rather nicely.
NFS, ftp, rcp, etc., all work fine when reading/getting data/files
*from* the server (server->client). But, whenever data is transferred
towards the server (client->server) throughput is between zilch and
approx 10-12KB/second (measured w/ FTP).
I have R all TFM, and don't know where to continue :-( Our ethernet
adapters are WD8013 Elite Plus (on all sides), we have thin cabling,
and what else do you want to know ? ;-)
I have included streams statistics and `netstat' output as well as a
list of my config variables, below. We have 32MB memory on an i486,
two SCSI disks on AH1542B, and a dumb Hostess adapter w/ 8 serial ports.
Could someone give me a clue on what to look at next ?
Thank you for your help.
-JP
/etc/conf/cf.d/config.h (munged to save space)
KDBSYMSIZE 300000 NBUF 0
MAXBUF 600 NCALL 30
NINODE 400 NS5INODE 300
NFILE 400 NMOUNT 12
CTBUFSIZE 128 NPROC 150
NREGION 400 NCLIST 120
MAXUP 30 NOFILES 60
NHBUF 256 NHINODE 128
NPBUF 20 DMAABLEBUF 16
NAUTOUP 10 NGROUPS 8
BDFLUSHR 30 MAXPMEM 0
SHLBMAX 8 FLCKREC 100
PUTBUFSZ 2000 MAXSLICE 100
ULIMIT 2097152 SPTMAP 50
PIOMAP 50 PIOMAXSZ 64
DO387CR3 0 NODE "logixwi"
CMASK 0 NSHINTR 8
NUMXT 3 NUMSXT 6
NCPYRIGHT 10 NKDVTTY 8
PRFMAX 3072 MAX_CFGSIZE 1024
VGA_PLASMA 0 NAHACCB 36
SDSKOUT 4 VHNDFRAC 16
AGEINTERVAL 31 GPGSLO 25
GPGSHI 40 GPGSMSK 1056
MAXSC 1 MAXFC 1
MAXUMEM 4096 MINARMEM 25
MINASMEM 25 MINHIDUSTK 4
MINUSTKGAP 2 NQUEUE 450
NSTREAM 200 NSTRPUSH 9
NSTREVENT 256 MAXSEPGCNT 1
NMUXLINK 87 STRMSGSZ 4096
STRCTLSZ 1024 NBLK4096 8
NBLK2048 32 NBLK1024 32
NBLK512 64 NBLK256 256
NBLK128 256 NBLK64 256
NBLK16 128 NBLK4 256
STRLOFRAC 80 STRMEDFRAC 90
NLOG 3 NUMSP 64
NUMTIM 32 NUMTRW 32
MSGMAP 100 MSGMAX 2048
MSGMNB 4096 MSGMNI 50
MSGSSZ 8 MSGTQL 40
MSGSEG 1024 SEMMAP 10
SEMMNI 10 SEMMNS 60
SEMMNU 30 SEMMSL 25
SEMOPM 10 SEMUME 10
SEMVMX 32767 SEMAEM 16384
SHMMAX 524288 SHMMIN 1
SHMMNI 100 SHMSEG 6
SHMALL 512 NRCVD 150
NSNDD 100 NSRMOUNT 10
NADVERTISE 25 MAXGDP 24
MINSERVE 3 MAXSERVE 6
NRDUSER 250 RFHEAP 3072
NLOCAL 0 NREMOTE 0
RCACHETIME 10 RFS_VHIGH 1
RFS_VLOW 1 S52KNBUF 100
S52KNHBUF 32 NMPBUF 0
NMPHEADBUF 100 BFREEMIN 0
PLOWBUFS 30 NCOPYBUF 100
S5CACHEENTS 256 S5HASHQS 61
S5OFBIAS 8 DSTFLAG 1
TBLNK 0 NSCRN 0
NEMAP 10 TIMEZONE 480
XSEMMAX 60 XSDSEGS 25
XSDSLOTS 3 SCRNMEM 0
KBTYPE 0 NDISK 4
EVQUEUES 40 EVDEVS 48
EVDEVSPERQ 3 NSPTTYS 48
DMAEXCL 0 ETRUNC 1
SECLUID 1 SECSTOPIO 1
SECCLEARID 1 NAIOPROC 5
NAIOREQ 120 NAIOBUF 120
NAIOHBUF 25 NAIOREQPP 120
NAIOLOCKTBL 10 EXTRA_NDEV 10
EXTRA_NEVENT 0 EXTRA_NFILSYS 0
MAX_BDEV 100 MAX_CDEV 100
MAXACPUS 9 NTTYP 30
NNFSRNODE 150 SCSI_NAHA 1
SCSI_NSTP 1 SCSI_NSDSK 2
# crash
dumpfile = /dev/mem, namelist = /unix, outfile = stdout
> strstat
ITEM CONFIG ALLOC FREE TOTAL MAX FAIL
streams 200 66 134 373 71 0
queues 450 284 166 756 304 0
message blocks 1610 195 1415 538051 525 0
data block totals 1288 195 1093 455832 382 262
data block size 4 256 1 255 3858 107 0
data block size 16 128 2 126 2520 102 262
data block size 64 256 63 193 366703 103 0
data block size 128 256 98 158 18884 140 0
data block size 256 256 23 233 21961 32 0
data block size 512 64 8 56 23809 16 0
data block size 1024 32 0 32 71 8 0
data block size 2048 32 0 32 17895 16 0
data block size 4096 8 0 8 131 3 0
Count of scheduled queues: 0
# netstat -i
Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll
wdn0 1500 192.109.38 logixwi 49090 0 48286 0 0
lo0 2048 loopback localhost 4696 0 4696 0 0
# netstat -s
ip:
53985 total packets received
0 bad header checksums
0 with size smaller than minimum
0 with data size < data length
0 with header length < data size
0 with data length < header length
92 fragments received
0 fragments dropped (dup or out of space)
23 fragments dropped after timeout
0 packets forwarded
0 packets not forwardable
0 redirects sent
tcp:
26886 packets sent
15874 data packets (1548459 bytes)
289 data packets (171894 bytes) retransmitted
10509 ack-only packets (9927 delayed)
0 URG only packets
0 window probe packets
69 window update packets
145 control packets
27753 packets received
15787 acks (for 1615014 bytes)
147 duplicate acks
0 acks for unsent data
12009 packets (453692 bytes) received in-sequence
64 completely duplicate packets (9966 bytes)
0 packets with some dup. data (0 bytes duped)
392 out-of-order packets (339762 bytes)
0 packets (0 bytes) of data after window
0 window probes
7 window update packets
1 packet received after close
0 discarded for bad checksums
0 discarded for bad header offset fields
0 discarded because packet too short
51 connection requests
45 connection accepts
95 connections established (including accepts)
177 connections closed (including 1 drop)
1 embryonic connection dropped
15588 segments updated rtt (of 15837 attempts)
246 retransmit timeouts
0 connections dropped by rexmit timeout
0 persist timeouts
1 keepalive timeout
1 keepalive probe sent
0 connections dropped by keepalive
8 connections lingered
0 linger timers expired
8 linger timers cancelled
0 linger timers aborted by signal
udp:
0 incomplete headers
0 bad data length fields
0 bad checksums
--
__ _____ __ __
| || _ \ | \/ | Logix GmbH +49-611-309797
__| || ___/ | | Moritzstrasse 50 jpm@Logix.DE
|_____||__| |__||__| D-6200 Wiesbaden ...!uunet!mcsun!unido!logixwi!jpm
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