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…ing on context close to write file.
…cate_*_binary to relocate_*_binaries
…r mach-o binary relocation.
gartung
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Aug 1, 2020
Whenever attempting to use any ncurses functionality within cscope, a
page fault would result within the ncurses library.
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7fad3cf in termattrs_sp () from .../lib/libncursesw.so.6
(gdb) bt
#0 0x00007ffff7fad3cf in termattrs_sp () from .../lib/libncursesw.so.6
#1 0x00007ffff7faa794 in _nc_setupscreen_sp () from .../lib/libncursesw.so.6
#2 0x00007ffff7fa614c in newterm_sp () from .../lib/libncursesw.so.6
#3 0x00007ffff7fa65b9 in newterm () from .../lib/libncursesw.so.6
#4 0x00007ffff7fa2970 in initscr () from .../lib/libncursesw.so.6
#5 0x0000000000403dc2 in main (argc=<optimized out>, argv=0x7fffffffcea8) at main.c:574
This is due to a conflict between libtinfo.so and libtinfow.so. Both are
linked into cscope:
$ ldd $(which cscope)
/bin/bash: .../lib/libtinfo.so.6: no version information available (required by /bin/bash)
linux-vdso.so.1 (0x00007fff5dbcb000)
libncursesw.so.6 => .../lib/libncursesw.so.6 (0x00007f435cc69000)
libtinfo.so.6 => .../lib/libtinfo.so.6 (0x00007f435cc2c000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f435ca29000)
libtinfow.so.6 => .../lib/libtinfow.so.6 (0x00007f435c9e8000)
/lib64/ld-linux-x86-64.so.2 (0x00007f435cca7000)
Specifically linking libtinfow.so instead of libtinfo.so resolves the
issue.
All instances of '...' above represent the path to the installed ncurses
for Spack.
gartung
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Sep 23, 2021
Git 2.24 introduced a feature flag for repositories with many files, see: https://github.blog/2019-11-03-highlights-from-git-2-24/#feature-macros Since Spack's Git repository contains roughly 8,500 files, it can be worthwhile to enable this, especially on slow file systems such as NFS: ``` $ hyperfine --warmup 3 'cd spack-default; git status' 'cd spack-manyfiles; git status' Benchmark #1: cd spack-default; git status Time (mean ± σ): 3.388 s ± 0.095 s [User: 256.2 ms, System: 625.8 ms] Range (min … max): 3.168 s … 3.535 s 10 runs Benchmark #2: cd spack-manyfiles; git status Time (mean ± σ): 168.7 ms ± 10.9 ms [User: 98.6 ms, System: 126.1 ms] Range (min … max): 144.8 ms … 188.0 ms 19 runs Summary 'cd spack-manyfiles; git status' ran 20.09 ± 1.42 times faster than 'cd spack-default; git status' ```
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