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| author | Noah Goldstein <goldstein.w.n@gmail.com> | 2023-08-11 18:48:01 -0500 |
|---|---|---|
| committer | Noah Goldstein <goldstein.w.n@gmail.com> | 2023-09-11 22:47:46 -0500 |
| commit | 9f27ef8090f26110be9de3514c7ca82c6f270265 (patch) | |
| tree | d7d02c4fbc52aa8cc54534a0b3fe21296e74009f | |
| parent | 01a8874ebade6cd4024f5c1e5522b4242fcc3b61 (diff) | |
| download | glibc-9f27ef8090f26110be9de3514c7ca82c6f270265.tar.gz glibc-9f27ef8090f26110be9de3514c7ca82c6f270265.tar.xz glibc-9f27ef8090f26110be9de3514c7ca82c6f270265.zip | |
x86: Fix incorrect scope of setting `shared_per_thread` [BZ# 30745]
The:
```
if (shared_per_thread > 0 && threads > 0)
shared_per_thread /= threads;
```
Code was accidentally moved to inside the else scope. This doesn't
match how it was previously (before af992e7abd).
This patch fixes that by putting the division after the `else` block.
(cherry picked from commit 084fb31bc2c5f95ae0b9e6df4d3cf0ff43471ede)
| -rw-r--r-- | sysdeps/x86/cacheinfo.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/sysdeps/x86/cacheinfo.c b/sysdeps/x86/cacheinfo.c index 951c1603d6..17db517830 100644 --- a/sysdeps/x86/cacheinfo.c +++ b/sysdeps/x86/cacheinfo.c @@ -679,18 +679,19 @@ init_cacheinfo (void) } else { - intel_bug_no_cache_info: +intel_bug_no_cache_info: /* Assume that all logical threads share the highest cache level. */ - threads = ((cpu_features->cpuid[COMMON_CPUID_INDEX_1].ebx >> 16) - & 0xff); - - /* Cap usage of highest cache level to the number of supported - threads. */ - if (shared_per_thread > 0 && threads > 0) - shared_per_thread /= threads; + threads + = ((cpu_features->cpuid[COMMON_CPUID_INDEX_1].ebx + >> 16) & 0xff); } + + /* Cap usage of highest cache level to the number of supported + threads. */ + if (shared_per_thread > 0 && threads > 0) + shared_per_thread /= threads; } /* Account for non-inclusive L2 and L3 caches. */ |