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glibc/elf/tst-rtld-list-tunables.exp

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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>
2020-07-12 21:04:53 +08:00
glibc.malloc.arena_max: 0x0 (min: 0x1, max: 0x[f]+)
glibc.malloc.arena_test: 0x0 (min: 0x1, max: 0x[f]+)
glibc.malloc.check: 0 (min: 0, max: 3)
malloc: Add Huge Page support for mmap With the morecore hook removed, there is not easy way to provide huge pages support on with glibc allocator without resorting to transparent huge pages. And some users and programs do prefer to use the huge pages directly instead of THP for multiple reasons: no splitting, re-merging by the VM, no TLB shootdowns for running processes, fast allocation from the reserve pool, no competition with the rest of the processes unlike THP, no swapping all, etc. This patch extends the 'glibc.malloc.hugetlb' tunable: the value '2' means to use huge pages directly with the system default size, while a positive value means and specific page size that is matched against the supported ones by the system. Currently only memory allocated on sysmalloc() is handled, the arenas still uses the default system page size. To test is a new rule is added tests-malloc-hugetlb2, which run the addes tests with the required GLIBC_TUNABLE setting. On systems without a reserved huge pages pool, is just stress the mmap(MAP_HUGETLB) allocation failure. To improve test coverage it is required to create a pool with some allocated pages. Checked on x86_64-linux-gnu. Reviewed-by: DJ Delorie <dj@redhat.com>
2021-08-17 02:08:27 +08:00
glibc.malloc.hugetlb: 0x0 (min: 0x0, max: 0x[f]+)
tunables: Disallow negative values for some tunables The glibc.malloc.mmap_max tunable as well as al of the INT_32 tunables don't have use for negative values, so pin the hardcoded limits in the non-negative range of INT. There's no real benefit in any of those use cases for the extended range of unsigned, so I have avoided added a new type to keep things simple.
2021-02-05 16:39:24 +08:00
glibc.malloc.mmap_max: 0 (min: 0, max: 2147483647)
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>
2020-07-12 21:04:53 +08:00
glibc.malloc.mmap_threshold: 0x0 (min: 0x0, max: 0x[f]+)
glibc.malloc.mxfast: 0x0 (min: 0x0, max: 0x[f]+)
glibc.malloc.perturb: 0 (min: 0, max: 255)
glibc.malloc.tcache_count: 0x0 (min: 0x0, max: 0x[f]+)
glibc.malloc.tcache_max: 0x0 (min: 0x0, max: 0x[f]+)
glibc.malloc.tcache_unsorted_limit: 0x0 (min: 0x0, max: 0x[f]+)
glibc.malloc.top_pad: 0x0 (min: 0x0, max: 0x[f]+)
glibc.malloc.trim_threshold: 0x0 (min: 0x0, max: 0x[f]+)
elf: Use new dependency sorting algorithm by default The default has to change eventually, and there are no known failures that require a delay. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2021-12-14 19:37:44 +08:00
glibc.rtld.dynamic_sort: 2 (min: 1, max: 2)
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>
2020-07-12 21:04:53 +08:00
glibc.rtld.nns: 0x4 (min: 0x1, max: 0x10)
glibc.rtld.optional_static_tls: 0x200 (min: 0x0, max: 0x[f]+)
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