diff options
| author | H.J. Lu <hjl.tools@gmail.com> | 2020-07-12 06:04:53 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2021-01-15 05:59:10 -0800 |
| commit | 86f65dffc2396d408beb628f1cad2b8f63e197bd (patch) | |
| tree | 70d71a492800a6b4838ff2232ecc315d353a469b /manual | |
| parent | cc528f9a7e51f769ea79a9c413af417671bcc695 (diff) | |
| download | glibc-86f65dffc2396d408beb628f1cad2b8f63e197bd.tar.gz glibc-86f65dffc2396d408beb628f1cad2b8f63e197bd.tar.xz glibc-86f65dffc2396d408beb628f1cad2b8f63e197bd.zip | |
ld.so: Add --list-tunables to print tunable values
Pass --list-tunables to ld.so to print tunables with min and max values. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'manual')
| -rw-r--r-- | manual/tunables.texi | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/manual/tunables.texi b/manual/tunables.texi index 1bbdc88281..1b746c0fa1 100644 --- a/manual/tunables.texi +++ b/manual/tunables.texi @@ -28,6 +28,44 @@ Finally, the set of tunables available may vary between distributions as the tunables feature allows distributions to add their own tunables under their own namespace. +Passing @option{--list-tunables} to the dynamic loader to print all +tunables with minimum and maximum values: + +@example +$ /lib64/ld-linux-x86-64.so.2 --list-tunables +glibc.rtld.nns: 0x4 (min: 0x1, max: 0x10) +glibc.elision.skip_lock_after_retries: 3 (min: -2147483648, max: 2147483647) +glibc.malloc.trim_threshold: 0x0 (min: 0x0, max: 0xffffffffffffffff) +glibc.malloc.perturb: 0 (min: 0, max: 255) +glibc.cpu.x86_shared_cache_size: 0x100000 (min: 0x0, max: 0xffffffffffffffff) +glibc.mem.tagging: 0 (min: 0, max: 255) +glibc.elision.tries: 3 (min: -2147483648, max: 2147483647) +glibc.elision.enable: 0 (min: 0, max: 1) +glibc.cpu.x86_rep_movsb_threshold: 0x1000 (min: 0x100, max: 0xffffffffffffffff) +glibc.malloc.mxfast: 0x0 (min: 0x0, max: 0xffffffffffffffff) +glibc.elision.skip_lock_busy: 3 (min: -2147483648, max: 2147483647) +glibc.malloc.top_pad: 0x0 (min: 0x0, max: 0xffffffffffffffff) +glibc.cpu.x86_rep_stosb_threshold: 0x800 (min: 0x1, max: 0xffffffffffffffff) +glibc.cpu.x86_non_temporal_threshold: 0xc0000 (min: 0x0, max: 0xffffffffffffffff) +glibc.cpu.x86_shstk: +glibc.cpu.hwcap_mask: 0x6 (min: 0x0, max: 0xffffffffffffffff) +glibc.malloc.mmap_max: 0 (min: -2147483648, max: 2147483647) +glibc.elision.skip_trylock_internal_abort: 3 (min: -2147483648, max: 2147483647) +glibc.malloc.tcache_unsorted_limit: 0x0 (min: 0x0, max: 0xffffffffffffffff) +glibc.cpu.x86_ibt: +glibc.cpu.hwcaps: +glibc.elision.skip_lock_internal_abort: 3 (min: -2147483648, max: 2147483647) +glibc.malloc.arena_max: 0x0 (min: 0x1, max: 0xffffffffffffffff) +glibc.malloc.mmap_threshold: 0x0 (min: 0x0, max: 0xffffffffffffffff) +glibc.cpu.x86_data_cache_size: 0x8000 (min: 0x0, max: 0xffffffffffffffff) +glibc.malloc.tcache_count: 0x0 (min: 0x0, max: 0xffffffffffffffff) +glibc.malloc.arena_test: 0x0 (min: 0x1, max: 0xffffffffffffffff) +glibc.pthread.mutex_spin_count: 100 (min: 0, max: 32767) +glibc.rtld.optional_static_tls: 0x200 (min: 0x0, max: 0xffffffffffffffff) +glibc.malloc.tcache_max: 0x0 (min: 0x0, max: 0xffffffffffffffff) +glibc.malloc.check: 0 (min: 0, max: 3) +@end example + @menu * Tunable names:: The structure of a tunable name * Memory Allocation Tunables:: Tunables in the memory allocation subsystem |