(gdb) info threads
  399 Thread 0x7f8a2922a700 (LWP 32301)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  396 Thread 0x7f8a294b4700 (LWP 32127)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  395 Thread 0x7f8a2b2eb700 (LWP 32112)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  390 Thread 0x7f8a2af9e700 (LWP 30609)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  389 Thread 0x7f8a283f2700 (LWP 30595)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  321 Thread 0x7f8a291a8700 (LWP 29346)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  242 Thread 0x7f8a25c0b700 (LWP 22216)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  -- / --
  167 Thread 0x7f8a2d6ff700 (LWP 23098)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  166 Thread 0x7f8a2cefe700 (LWP 23099)  0x00000031ad4d9093 in select () from /lib64/libc.so.6
  165 Thread 0x7f8a2c6fd700 (LWP 23100)  0x00000031ad4d9093 in select () from /lib64/libc.so.6
  164 Thread 0x7f8a2befc700 (LWP 23101)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  163 Thread 0x7f8a2b6fb700 (LWP 23102)  0x00000031ad80ec6c in sigwait () from /lib64/libpthread.so.0
  162 Thread 0x7f8a2ae18700 (LWP 5887)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  -- / --
  143 Thread 0x7f8a2b4b2700 (LWP 6325)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
---Type <return> to continue, or q <return> to quit---
  142 Thread 0x7f8a2af1c700 (LWP 6342)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  -- / --
  105 Thread 0x7f8a27c54700 (LWP 30585)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
---Type <return> to continue, or q <return> to quit---
  104 Thread 0x7f8a257ba700 (LWP 30628)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  -- / --
  84 Thread 0x7f8a25738700 (LWP 22465)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  83 Thread 0x7f8a2b4f3700 (LWP 22504)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  82 Thread 0x7f8a28c53700 (LWP 22514)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  81 Thread 0x7f8a28906700 (LWP 22535)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  80 Thread 0x7f8a28bd1700 (LWP 22538)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  78 Thread 0x7f8a255f3700 (LWP 22580)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  77 Thread 0x7f8a2867c700 (LWP 22593)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  76 Thread 0x7f8a2aa8a700 (LWP 22612)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  75 Thread 0x7f8a2822b700 (LWP 22615)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  74 Thread 0x7f8a2a1e8700 (LWP 22638)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  73 Thread 0x7f8a258ff700 (LWP 22641)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  72 Thread 0x7f8a25e54700 (LWP 22650)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  71 Thread 0x7f8a25b89700 (LWP 22653)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  69 Thread 0x7f8a25571700 (LWP 22704)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  68 Thread 0x7f8a29883700 (LWP 22718)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  67 Thread 0x7f8a28d98700 (LWP 22730)  0x000000000078aea7 in lock_rec_get_prev ()
  65 Thread 0x7f8a2a021700 (LWP 22745)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  -- / --
  46 Thread 0x7f8a2aa08700 (LWP 6880)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  45 Thread 0x7f8a2a4f4700 (LWP 21943)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  44 Thread 0x7f8a254ae700 (LWP 21946)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  43 Thread 0x7f8a256b6700 (LWP 21966)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  42 Thread 0x7f8a2601b700 (LWP 21969)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  41 Thread 0x7f8a25940700 (LWP 21994)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  40 Thread 0x7f8a283b1700 (LWP 21997)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  39 Thread 0x7f8a25120700 (LWP 22269)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  38 Thread 0x7f8a280a5700 (LWP 22286)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  37 Thread 0x7f8a2b3ef700 (LWP 22540)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  36 Thread 0x7f8a2a5b7700 (LWP 22543)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  35 Thread 0x7f8a2587d700 (LWP 22574)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  34 Thread 0x7f8a250df700 (LWP 22583)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  33 Thread 0x7f8a254ef700 (LWP 22609)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  32 Thread 0x7f8a2a535700 (LWP 22617)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  31 Thread 0x7f8a2b679700 (LWP 22681)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  30 Thread 0x7f8a29946700 (LWP 22685)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  29 Thread 0x7f8a2926b700 (LWP 22834)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  28 Thread 0x7f8a24d92700 (LWP 22837)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  27 Thread 0x7f8a27d17700 (LWP 22874)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  26 Thread 0x7f8a29987700 (LWP 22877)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  25 Thread 0x7f8a24e55700 (LWP 22889)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  24 Thread 0x7f8a24c0c700 (LWP 22892)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  23 Thread 0x7f8a25b48700 (LWP 22898)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  22 Thread 0x7f8a25c4c700 (LWP 22901)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  21 Thread 0x7f8a24fdb700 (LWP 22912)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  20 Thread 0x7f8a252e7700 (LWP 22915)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  19 Thread 0x7f8a25369700 (LWP 22923)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  18 Thread 0x7f8a24ed7700 (LWP 22926)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
---Type <return> to continue, or q <return> to quit---
* 17 Thread 0x7f8a252a6700 (LWP 22932)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  16 Thread 0x7f8a2501c700 (LWP 22935)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  15 Thread 0x7f8a24e96700 (LWP 22941)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  14 Thread 0x7f8a251a2700 (LWP 22944)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  13 Thread 0x7f8a25265700 (LWP 22965)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  12 Thread 0x7f8a25224700 (LWP 22968)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  11 Thread 0x7f8a253eb700 (LWP 2043)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  10 Thread 0x7f8a28a8c700 (LWP 2046)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  9 Thread 0x7f8a28b4f700 (LWP 2054)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  8 Thread 0x7f8a25634700 (LWP 2057)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  7 Thread 0x7f8a24f59700 (LWP 2453)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  6 Thread 0x7f8a24f18700 (LWP 2456)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  5 Thread 0x7f8a245b3700 (LWP 2733)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  4 Thread 0x7f8a24572700 (LWP 2785)  0x00000031ad80b3b4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  3 Thread 0x7f8a29c52700 (LWP 31067)  0x00000031ad80df7d in read () from /lib64/libpthread.so.0
  1 Thread 0x7f8bccd2c800 (LWP 23071)  0x00000031ad4d9093 in select () from /lib64/libc.so.6
(gdb)