benchtests: Enable BENCHSET to run subset of tests

This patch adds BENCHSET variable to benchtests/Makefile in order to
provide the capability to run a list of subsets of benchmark tests, ie;

    make bench BENCHSET="bench-pthread bench-math malloc-thread"

This helps users to benchmark specific glibc area

ChangeLog:

        * benchtests/Makefile:Add BENCHSET to allow subsets of
        benchmarks to be run.
        * benchtests/README: Add documentation for: Running subsets of
        benchmarks.

Signed-off-by: Victor Rodriguez <victor.rodriguez.bahena@intel.com>
Signed-off-by: Icarus Sparry <icarus.w.sparry@intel.com>
Reviewed-By: Siddhesh Poyarekar <siddhesh@sourceware.org>

1 files changed, 19 insertions, 0 deletions

diff --git a/benchtests/README b/benchtests/README
index 9aa750a..4ddff79 100644
--- a/benchtests/README
+++ b/benchtests/README
@@ -53,6 +53,25 @@ otherwise the above command may try to build the benchmark again.  Benchmarks
 that require generated code to be executed during the build are skipped when
 cross-building.
 
+Running subsets of benchmarks:
+==============================
+
+To run only a subset of benchmarks, one may invoke make as follows
+
+  $ make bench BENCHSET="bench-pthread bench-math malloc-thread"
+
+where BENCHSET may be a space-separated list of the following values:
+
+    bench-math
+    bench-pthread
+    bench-string
+    string-benchset
+    wcsmbs-benchset
+    stdlib-benchset
+    stdio-common-benchset
+    math-benchset
+    malloc-thread
+
 Adding a function to benchtests:
 ===============================