[Monotone-devel] Re: Monotone hangs while reading branch from depot

[Peter Simons]

graydon hoare writes:

 > but that's just a guess. could you perhaps oprofile or
 > gdb it and see where it's spinning? maybe there's some
 > way to wedge the packet regex or something.

I ran the 'fetch' command with strace and got this:

 | execve("/usr/local/monotone/bin/monotone", ["monotone", "--db=test.db", 
"--branch", "system.www.cryp.to", "fetch"], [/* 43 vars */]) = 0
 | uname({sys="Linux", node="peti.cryp.to", ...}) = 0
 | [...]
 | _llseek(3, 1001472, [1001472], SEEK_SET) = 0
 | write(3, "\324\3\0\0003bJkuZ5Th+7T0UZ/WqBU5DVbL03\n"..., 1024) = 1024
 | _llseek(3, 1002496, [1002496], SEEK_SET) = 0
 | write(3, "\325\3\0\0kqE6t7WhGR0YynamLOh0SXXpxU3K"..., 1024) = 1024
 | _llseek(3, 1003520, [1003520], SEEK_SET) = 0
 | write(3, "\326\3\0\0/5Ul9pHr1eW6m8/BqplqS3kbdQCj"..., 1024) = 1024
 | _llseek(3, 1004544, [1004544], SEEK_SET) = 0
 | write(3, "\327\3\0\00031sySWao7Y177qr7AQ66/WXu95Jd"..., 1024) = 1024
 | _llseek(3, 1005568, [1005568], SEEK_SET) = 0
 | write(3, "\330\3\0\0QpiecvpyEC03WDgtH42TjjKo0zUB"..., 1024) = 1024
 | write(2, "\r", 1
)                       = 1
 | write(2, "m", 1m)                        = 1
 | write(2, "o", 1o)                        = 1
 | write(2, "n", 1n)                        = 1
 | write(2, "o", 1o)                        = 1
 | write(2, "t", 1t)                        = 1
 | write(2, "o", 1o)                        = 1
 | write(2, "n", 1n)                        = 1
 | write(2, "e", 1e)                        = 1
 | write(2, ":", 1:)                        = 1
 | write(2, " ", 1 )                        = 1
 | write(2, "[", 1[)                        = 1
 | write(2, "b", 1b)                        = 1
 | write(2, "y", 1y)                        = 1
 | write(2, "t", 1t)                        = 1
 | write(2, "e", 1e)                        = 1
 | write(2, "s", 1s)                        = 1
 | write(2, ":", 1:)                        = 1
 | write(2, " ", 1 )                        = 1
 | write(2, "2", 12)                        = 1
 | write(2, "9", 19)                        = 1
 | write(2, "4", 14)                        = 1
 | write(2, "0", 10)                        = 1
 | write(2, "6", 16)                        = 1
 | write(2, "9", 19)                        = 1
 | write(2, "5", 15)                        = 1
 | write(2, "]", 1])                        = 1
 | write(2, " ", 1 )                        = 1
 | write(2, "[", 1[)                        = 1
 | write(2, "p", 1p)                        = 1
 | write(2, "a", 1a)                        = 1
 | write(2, "c", 1c)                        = 1
 | write(2, "k", 1k)                        = 1
 | write(2, "e", 1e)                        = 1
 | write(2, "t", 1t)                        = 1
 | write(2, "s", 1s)                        = 1
 | write(2, ":", 1:)                        = 1
 | write(2, " ", 1 )                        = 1
 | write(2, "6", 16)                        = 1
 | write(2, "3", 13)                        = 1
 | write(2, "]", 1])                        = 1
 | write(2, " ", 1 )                        = 1
 | recv(7, "iAwctyvvQYzp/rQCZG\nDp98RP+JPIoSu"..., 4096, 0) = 4096
 | recv(7, "pW5bjCrca6w1OE/QJi\nCa9E5RSJuBqvT"..., 4096, 0) = 4096
 | recv(7, "uS4fLOPQUqIxKTsHB8\ndPby5ITOYsIaI"..., 4096, 0) = 4096
 | recv(7, "CANkvTe939yuoQThQ8\n2TshzRW1hDbxM"..., 4096, 0) = 4096
 | recv(7, "wj3yHGphGJdvZ4dclD\n8SeCxZuD2/3Ay"..., 4096, 0) = 3120
 | recv(7, "", 4096, 0)                    = 0
 | close(7)                                = 0

After this, monotone doesn't produce any further output,
neither on the console nor in the strace log. It does,
however, still eat up all the CPU cycles.

Does this help?

Peter