哪位大俠給分析一下 strace 輸出

hua_xg

suse linux 下 一個c 程序，啟動后用 strace -f -p 跟蹤了一下，本來程序啟動應(yīng)該只有2個線程，可輸出說有8個，不知道那些線程是怎么回事，哪位高人給指點(diǎn)一二
輸出是：
strace -f -p 7314
Process 7321 attached with 8 threads - interrupt to quit
[pid  7314] time( <unfinished ...>
[pid  7315] read(7,  <unfinished ...>
[pid  7316] futex(0x80d5204, FUTEX_WAIT, 3, NULL <unfinished ...>
[pid  7317] futex(0x80d5204, FUTEX_WAIT, 3, NULL <unfinished ...>
[pid  7318] futex(0x80d5204, FUTEX_WAIT, 3, NULL <unfinished ...>
[pid  7319] poll( <unfinished ...>
[pid  7320] accept(6,  <unfinished ...>
[pid  7321] setup( <unfinished ...>
[pid  7314] <... time resumed> NULL)    = 1220428832
[pid  7314] stat64("/etc/localtime", {st_mode=S_IFREG|0644, st_size=165, ...}) = 0
[pid  7314] uname({sys="Linux", node="linux", ...}) = 0
[pid  7314] write(5, "Sep 03 16:00:32 linux: src/sigha"..., 82) = 82
[pid  7314] rt_sigtimedwait([HUP INT TERM],  <unfinished ...>

linuxosa

pthread library 也會啟動一些線程

hua_xg

哦，明白了，strace 挖的還挺深，謝了~~~