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| author | Torvald Riegel <triegel@redhat.com> | 2013-10-08 14:17:01 +0300 |
|---|---|---|
| committer | Torvald Riegel <triegel@redhat.com> | 2014-04-10 21:22:28 +0200 |
| commit | 6a5d6ea128153f5a00d8c80f15f76004006767da (patch) | |
| tree | 74bf61305b9ec52b30373226cf7a1fcbcec8d27c /benchtests/README | |
| parent | a4c75cfd56e536c2b18556e8a482d88dffa0fffc (diff) | |
| download | glibc-6a5d6ea128153f5a00d8c80f15f76004006767da.zip glibc-6a5d6ea128153f5a00d8c80f15f76004006767da.tar.gz glibc-6a5d6ea128153f5a00d8c80f15f76004006767da.tar.bz2 | |
benchtests: Add pthread_once common-case test.
We have a single thread that runs a no-op initialization once and then
repeatedly runs checks of the initialization (i.e., an acquire load and
conditional jump) in a tight loop. This gives us, on average, the
best-case latency of pthread_once (the initialization is the
exactly-once slow path, and we're not looking at initialization-related
synchronization overheads in this case).
Diffstat (limited to 'benchtests/README')
| -rw-r--r-- | benchtests/README | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/benchtests/README b/benchtests/README index 2a940fa..52a3cc2 100644 --- a/benchtests/README +++ b/benchtests/README @@ -60,6 +60,8 @@ one to add `foo' to the bench tests: - include-sources: This should be assigned a comma-separated list of source files that need to be included to provide definitions of global variables and functions (specifically, this includes using "#include "source"). + See pthread_once-inputs and pthreads_once-source.c for an example of how + to use this to benchmark a function that needs state across several calls. - name: See following section for instructions on how to use this directive. Lines beginning with a single hash '#' are treated as comments. See |