diff options
| author | Siddhesh Poyarekar <siddhesh@sourceware.org> | 2017-06-30 22:58:39 +0530 |
|---|---|---|
| committer | Siddhesh Poyarekar <siddhesh@sourceware.org> | 2017-06-30 22:58:39 +0530 |
| commit | 28cfa3a48e59f9c6b9bc25a003a4ede435841382 (patch) | |
| tree | ec2c7a24f4fd2a0d8b4e2ead2dabc36b6b3c3cf9 /ChangeLog | |
| parent | ab85da15301c552e3ea4577a6432aa028bee9295 (diff) | |
| download | glibc-28cfa3a48e59f9c6b9bc25a003a4ede435841382.tar.gz glibc-28cfa3a48e59f9c6b9bc25a003a4ede435841382.tar.xz glibc-28cfa3a48e59f9c6b9bc25a003a4ede435841382.zip | |
tunables, aarch64: New tunable to override cpu
Add a new tunable (glibc.tune.cpu) to override CPU identification on aarch64. This is useful in two cases: one where it is desirable to pretend to be another CPU for purposes of testing or because routines written for that CPU are beneficial for specific workloads and second where the underlying kernel does not support emulation of MRS to get the MIDR of the CPU. * elf/dl-tunables.h (tunable_is_name): Move from... * elf/dl-tunables.c (is_name): ... here. (parse_tunables, __tunables_init): Adjust. * manual/tunables.texi: Document glibc.tune.cpu. * sysdeps/aarch64/dl-tunables.list: New file. * sysdeps/unix/sysv/linux/aarch64/cpu-features.c (struct cpu_list): New type. (cpu_list): New list of CPU names and their MIDR. (get_midr_from_mcpu): New function. (init_cpu_features): Override MIDR if necessary.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog index a95505220d..24832540b8 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,16 @@ 2017-06-30 Siddhesh Poyarekar <siddhesh@sourceware.org> + * elf/dl-tunables.h (tunable_is_name): Move from... + * elf/dl-tunables.c (is_name): ... here. + (parse_tunables, __tunables_init): Adjust. + * manual/tunables.texi: Document glibc.tune.cpu. + * sysdeps/aarch64/dl-tunables.list: New file. + * sysdeps/unix/sysv/linux/aarch64/cpu-features.c (struct + cpu_list): New type. + (cpu_list): New list of CPU names and their MIDR. + (get_midr_from_mcpu): New function. + (init_cpu_features): Override MIDR if necessary. + * sysdeps/aarch64/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Unconditionally select thunderx routine for testing. |