It just happened again, so I was wrong about the nic. Here is a part of the ktrace of jabberd at a busy moment. Not much to see, this scrolls over my screen very fast.
9519 jabberd RET select 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask -2147483648/0x80000000 9519 jabberd CALL gettimeofday(0x3c04f144,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x3,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL gettimeofday(0x3c032e80,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigpending 9519 jabberd RET sigpending 0 9519 jabberd CALL read(0x4,0x3c032d90,0x80) 9519 jabberd RET read -1 errno 35 Resource temporarily unavailable 9519 jabberd CALL sigprocmask(0x3,0x80000000) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL select(0x1b,0x3c032d10,0x3c032c90,0x3c032c10,0x3c032a58) 9519 jabberd RET select 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask -2147483648/0x80000000 9519 jabberd CALL gettimeofday(0x3c04f144,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x3,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL gettimeofday(0x3c032e80,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigpending 9519 jabberd RET sigpending 0 9519 jabberd CALL read(0x4,0x3c032d90,0x80) 9519 jabberd RET read -1 errno 35 Resource temporarily unavailable 9519 jabberd CALL sigprocmask(0x3,0x80000000) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL select(0x1b,0x3c032d10,0x3c032c90,0x3c032c10,0x3c032a58) 9519 jabberd RET select 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask -2147483648/0x80000000 9519 jabberd CALL gettimeofday(0x3c04f144,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x3,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL gettimeofday(0x3c032e80,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigpending 9519 jabberd RET sigpending 0 9519 jabberd CALL read(0x4,0x3c032d90,0x80) 9519 jabberd RET read -1 errno 35 Resource temporarily unavailable 9519 jabberd CALL sigprocmask(0x3,0x80000000) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL select(0x1b,0x3c032d10,0x3c032c90,0x3c032c10,0x3c032a58) 9519 jabberd RET select 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask -2147483648/0x80000000 9519 jabberd CALL gettimeofday(0x3c04f144,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x3,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL gettimeofday(0x3c032e80,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigpending 9519 jabberd RET sigpending 0 9519 jabberd CALL read(0x4,0x3c032d90,0x80) 9519 jabberd RET read -1 errno 35 Resource temporarily unavailable 9519 jabberd CALL sigprocmask(0x3,0x80000000) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL select(0x1b,0x3c032d10,0x3c032c90,0x3c032c10,0x3c032a58) 9519 jabberd RET select 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask -2147483648/0x80000000 9519 jabberd CALL gettimeofday(0x3c04f144,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x3,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL gettimeofday(0x3c032e80,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigpending 9519 jabberd RET sigpending 0 9519 jabberd CALL read(0x4,0x3c032d90,0x80) 9519 jabberd RET read -1 errno 35 Resource temporarily unavailable 9519 jabberd CALL sigprocmask(0x3,0x80000000) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL select(0x1b,0x3c032d10,0x3c032c90,0x3c032c10,0x3c032a58) 9519 jabberd RET select 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask -2147483648/0x80000000 9519 jabberd CALL gettimeofday(0x3c04f144,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x3,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL gettimeofday(0x3c032e80,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigpending 9519 jabberd RET sigpending 0 9519 jabberd CALL read(0x4,0x3c032d90,0x80) 9519 jabberd RET read -1 errno 35 Resource temporarily unavailable 9519 jabberd CALL sigprocmask(0x3,0x80000000) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL select(0x1b,0x3c032d10,0x3c032c90,0x3c032c10,0x3c032a58) 9519 jabberd RET select 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask -2147483648/0x80000000 9519 jabberd CALL gettimeofday(0x3c04f144,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x3,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL gettimeofday(0x3c032e80,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigpending 9519 jabberd RET sigpending 0 9519 jabberd CALL read(0x4,0x3c032d90,0x80) 9519 jabberd RET read -1 errno 35 Resource temporarily unavailable 9519 jabberd CALL sigprocmask(0x3,0x80000000) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL select(0x1b,0x3c032d10,0x3c032c90,0x3c032c10,0x3c032a58) 9519 jabberd RET select 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask -2147483648/0x80000000 9519 jabberd CALL gettimeofday(0x3c04f144,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x3,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL gettimeofday(0x3c032e80,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigpending 9519 jabberd RET sigpending 0 9519 jabberd CALL read(0x4,0x3c032d90,0x80) 9519 jabberd RET read -1 errno 35 Resource temporarily unavailable 9519 jabberd CALL sigprocmask(0x3,0x80000000) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL select(0x1b,0x3c032d10,0x3c032c90,0x3c032c10,0x3c032a58) 9519 jabberd RET select 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask -2147483648/0x80000000 9519 jabberd CALL gettimeofday(0x3c04f144,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x3,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL gettimeofday(0x3c032e80,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigpending 9519 jabberd RET sigpending 0 9519 jabberd CALL read(0x4,0x3c032d90,0x80) 9519 jabberd RET read -1 errno 35 Resource temporarily unavailable 9519 jabberd CALL sigprocmask(0x3,0x80000000) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL select(0x1b,0x3c032d10,0x3c032c90,0x3c032c10,0x3c032a58) 9519 jabberd RET select 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask -2147483648/0x80000000 9519 jabberd CALL gettimeofday(0x3c04f144,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x3,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL gettimeofday(0x3c032e80,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigpending 9519 jabberd RET sigpending 0 9519 jabberd CALL read(0x4,0x3c032d90,0x80) 9519 jabberd RET read -1 errno 35 Resource temporarily unavailable 9519 jabberd CALL sigprocmask(0x3,0x80000000) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL select(0x1b,0x3c032d10,0x3c032c90,0x3c032c10,0x3c032a58) 9519 jabberd RET select 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask -2147483648/0x80000000 9519 jabberd CALL gettimeofday(0x3c04f144,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x3,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL gettimeofday(0x3c032e80,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigpending 9519 jabberd RET sigpending 0 9519 jabberd CALL read(0x4,0x3c032d90,0x80) 9519 jabberd RET read -1 errno 35 Resource temporarily unavailable 9519 jabberd CALL sigprocmask(0x3,0x80000000) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL select(0x1b,0x3c032d10,0x3c032c90,0x3c032c10,0x3c032a58) 9519 jabberd RET select 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask -2147483648/0x80000000 9519 jabberd CALL gettimeofday(0x3c04f144,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x3,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL gettimeofday(0x3c032e80,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigpending 9519 jabberd RET sigpending 0 9519 jabberd CALL read(0x4,0x3c032d90,0x80) 9519 jabberd RET read -1 errno 35 Resource temporarily unavailable 9519 jabberd CALL sigprocmask(0x3,0x80000000) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL select(0x1b,0x3c032d10,0x3c032c90,0x3c032c10,0x3c032a58) 9519 jabberd RET select 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask -2147483648/0x80000000 9519 jabberd CALL gettimeofday(0x3c04f144,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x3,0) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL sigprocmask(0x1,0) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL sigprocmask(0x3,0xfffefeff) 9519 jabberd RET sigprocmask 0 9519 jabberd CALL gettimeofday(0x3c032e80,0) 9519 jabberd RET gettimeofday 0 9519 jabberd CALL sigpending 9519 jabberd RET sigpending 0 9519 jabberd CALL read(0x4,0x3c032d90,0x80) 9519 jabberd RET read -1 errno 35 Resource temporarily unavailable 9519 jabberd CALL sigprocmask(0x3,0x80000000) 9519 jabberd RET sigprocmask -65793/0xfffefeff 9519 jabberd CALL select(0x1b,0x3c032d10,0x3c032c90,0x3c032c10,0x3c032a58) 9519 jabberd RET select 0
