Skip to content

glibc fn's in profiles on zen2 #46

@nickdesaulniers

Description

@nickdesaulniers

compared to a profile from #39 on my previous xeon, my zen2 workstation has profiles like:

Samples: 763K of event 'cycles:u', Event count (approx.): 8771740701408
  Overhead  Shared Object                      Symbol
+    2.39%  clang-16                           [.] clang::SourceManager::getFileIDLocal                                                                                                            ◆
+    1.75%  clang-16                           [.] llvm::StringMapImpl::LookupBucketFor                                                                                                            ▒
+    1.52%  libc-2.33.so                       [.] ____wcstod_l_internal                                                                                                                           ▒
+    1.50%  clang-16                           [.] clang::Lexer::LexTokenInternal                                                                                                                  ▒
+    1.43%  clang-16                           [.] clang::TokenLexer::Lex                                                                                                                          ▒
+    1.24%  clang-16                           [.] clang::Preprocessor::Lex                                                                                                                        ▒
+    1.22%  clang-16                           [.] GetFullTypeForDeclarator                                                                                                                        ▒
+    1.20%  libc-2.33.so                       [.] __memmove_ssse3 

it's surprising to see ____wcstod_l_internal and __memmove_ssse3 in there. I wonder if something is wrong with glibc on zen2? Shouldn't memmove be using something newer than sse3?

Metadata

Metadata

Assignees

No one assigned

    Labels

    No labels
    No labels

    Type

    No type

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions