(gdb) info threads
  Id   Target Id         Frame 
  28   LWP 56605         pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  27   LWP 56573         __atomic_add (__val=1, __mem=0x7f90877c7368) at /usr/local/include/c++/7.3.0/ext/atomicity.h:53
  26   LWP 56572         pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  25   LWP 56571         pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  24   LWP 56570         pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  23   LWP 56569         pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  22   LWP 56568         pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  21   LWP 56567         compare_exchange_strong (__m2=<optimized out>, __m1=std::memory_order_seq_cst, __i2=2048, __i1=@0x7f90e27e9c48: 0, this=0x7f9087ced050) at /usr/local/include/c++/7.3.0/bits/atomic_base.h:477
  20   LWP 56566         key (this=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/stored-value.h:1152
  19   LWP 56565         HashTable::Statistics::epilogue (this=this@entry=0x7f9087802270, pre=..., v=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/hash_table.cc:509
  18   LWP 56564         pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  17   LWP 56563         0x00007f911e476f83 in pread64 () at ../sysdeps/unix/syscall-template.S:81
  16   LWP 56560         pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  15   LWP 56556         pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
  14   LWP 56555         pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
  13   LWP 56554         pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
  12   LWP 56553         pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
  11   LWP 56551         syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
  10   LWP 56550         __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
  9    LWP 56549         syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
  8    LWP 56548         pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  7    LWP 56547         pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  6    LWP 56546         0x00007f911e18dbed in poll () at ../sysdeps/unix/syscall-template.S:81
  5    LWP 56545         pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  4    LWP 56544         pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  3    LWP 56543         pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  2    LWP 56542         syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
* 1    LWP 56552         0x00007f911e0d0337 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:55
(gdb)