Conference turris::digital_unix

8940.0. "is this network tuned incorrectly?" by RHETT::LACORTI () Mon Feb 24 1997 13:23

    I had a customer tune their inet parameters as follows below.
    They are also having panics in networking code which leads me
    to believe that they have tuned something wrong here. If anyone
    has input into these values I would appriciate it. I will also
    include 2 of the stack traces
    
    inet:
            tcbhashsize = 1024                       *these are the ones
            tcp_keepinit = 30                             
            tcp_sendspace = 28672
            tcp_recvspace = 28672
            tcp_ttl = 64
            udp_sendspace = 49152                       
            udp_recvspace = 49152
            udp_ttl = 64                                *
    
    ipc:
            sem-mni = 256
    
    proc:
            autonice = 1
            maxusers = 1024
            max-proc-per-user = 15
            max-threads-per-user = 128
    
    pts:
            nptys = 512
    
    socket:
            somaxconn = 32767
            sominconn = 32767
    
    vfs:
            bufcache = 1 		*this does seem low*
    
    
    
----
    
     1 panic(s = 0xfffffc000058b150 = "kernel memory fault")
    ["../../../../src/kernel/bsd/subr_prf.c":791, 0xfffffc000027a92c]
       2 trap() ["../../../../src/kernel/arch/alpha/trap.c":1512,
    0xfffffc0000459058]
       3 uaerror(0x0, 0xfffffc00003707b0, 0xfffffc00005ad1a0,
    0xfffffc0000608460, 0x18)
    ["../../../../src/kernel/arch/alpha/locore.s":1595, 0xfffffc000044d270]
       4 tcp_close(0xfffffc00003705d8, 0xfffffc0007943300,
    0xfffffc002b8fe640, 0x6a, 0xfffffc0007943300)
    ["../../../../src/kernel/netinet/tcp_subr.c":606, 0xfffffc00003707ac]
       5 tcp_drop(0xfffffc0007943300, 0x13, 0xfffffc00003712b8,
    0xfffffc0007943300, 0x0)
    ["../../../../src/kernel/netinet/tcp_subr.c":510, 0xfffffc00003705d4]
       6 tcp_timers(0xfffffc00003712b8, 0xfffffc0007943300, 0x0, 0x0,
    0xfffffc0000371968) ["../../../../src/kernel/netinet/tcp_timer.c":387,
    0xfffffc00003712b4]
       7 tcp_usrreq(0xfffffc0007943300, 0xfffffc000efc6a80,
    0xfffffc0009740d80, 0xfffffc000794331c, 0x0)
    ["../../../../src/kernel/netinet/tcp_usrreq.c":525, 0xfffffc0000371964]
       8 tcp_slowtimo(0xfffffc00005d92f0, 0xfffffc00005b41b0,
    0xfffffc0000608b48, 0xfffffc002b8fe640, 0xfffffc0009740e28)
    ["../../../../src/kernel/netinet/tcp_timer.c":295, 0xfffffc0000370d20]
       9 pfslowtimo(0xfffffc00002b6224, 0x1, 0x0, 0xfffffc00005dcf48,
    0xfffffc000028bfa0) ["../../../../src/kernel/bsd/uipc_domain.c":433,
    0xfffffc000028bff0]
      10 netisr_thread() ["../../../../src/kernel/net/netisr.c":841,
    0xfffffc00002b6220]
    ----
    
     22 boot(0x0, 0xfffffc0017f6d340, 0x2c0000002c, 0x2c, 0x1)
    ["../../../../src/kernel/arch/alpha/machdep.c":2416,
    0xfffffc000045106c]
      23 panic(s = 0xfffffc000058b150 = "kernel memory fault")
    ["../../../../src/kernel/bsd/subr_prf.c":791, 0xfffffc000027a92c]
      24 trap() ["../../../../src/kernel/arch/alpha/trap.c":1512,
    0xfffffc0000459058]
      25 _XentMM(0x5, 0xfffffc000025fd34, 0xfffffc00005ad1a0,
    0x8000c010c3184218, 0xfffffc00005d9940)
    ["../../../../src/kernel/arch/alpha/locore.s":1424, 0xfffffc000044d124]
      26 malloc(size = 256)
    ["../../../../src/kernel/bsd/kern_malloc.c":871, 0xfffffc000025fd30]
      27 pf_mcopym(0x2, 0x1, 0x0, 0x100000000, 0xfffffc0000000001)
    ["../../../../src/kernel/net/pfilt.c":3464, 0xfffffc000035445c]
      28 pfilt_filter(0xfffffc00005a58f0, 0xfffffc001d88aa80,
    0xfffffc0018bc3e80, 0x0, 0xfffffc0000456ef4)
    ["../../../../src/kernel/net/pfilt.c":2657, 0xfffffc0000353040]
      29 ether_input(0x4, 0xfffffc002fa84800, 0x2d9621aa,
    0xfffffc002d82f800, 0x3ff00000004)
    ["../../../../src/kernel/net/if_ethersubr.c":1123, 0xfffffc0000359540]
      30 tu_receive_int(0xfffffc00005d7458, 0xfffffffffc670044, 0x18000,
    0x9, 0xaa00
    f9ab4]
      31 tuintr(0x0, 0xfffffc0000237ac1, 0x1, 0x3ffc008ae28, 0x3ffc00959a0)
    ["../../../../src/kernel/io/dec/netif/if_tu.c":3008,
    0xfffffc00004f8f28]
      32 intr_dispatch_post(0x1, 0x3ffc008ae28, 0x3ffc00959a0, 0x1200323c4,
    0xfffffc000044cd80)
    ["../../../../src/kernel/arch/alpha/hal/shared_intr.c":242,
    0xfffffc00004f50a8
     33 _XentInt(0x8, 0x3ff800d2178, 0x3ffc00931b0, 0x3ffc00939a0,
    0x14003c380) ["../../../../src/kernel/arch/alpha/locore.s":1049,
    0xfffffc000044cd7c]
    (dbx)