[PATCH 17/75] tools build feature: Check if libaio is available

Arnaldo Carvalho de Melo
2018-12-06T21:27:47Z

From: Alexey Budankov <alexey.budankov@linux.intel.com>

This will be used by 'perf record' to speed up reading the perf ring
buffer.

Committer testing:

$ make -C tools/perf O=/tmp/build/perf
make: Entering directory '/home/acme/git/perf/tools/perf'
BUILD: Doing 'make -j8' parallel build

Auto-detecting system features:
... dwarf: [ on ]
... dwarf_getlocations: [ on ]
... glibc: [ on ]
... gtk2: [ OFF ]
... libaudit: [ OFF ]
... libbfd: [ OFF ]
... libelf: [ on ]
... libnuma: [ OFF ]
... numa_num_possible_cpus: [ OFF ]
... libperl: [ OFF ]
... libpython: [ OFF ]
... libslang: [ on ]
... libcrypto: [ on ]
... libunwind: [ on ]
... libdw-dwarf-unwind: [ on ]
... zlib: [ on ]
... lzma: [ on ]
... get_cpuid: [ on ]
... bpf: [ on ]
... libaio: [ on ]

$ ls -la /tmp/build/perf/feature/test-libaio.*
-rwxrwxr-x. 1 acme acme 18296 Nov 26 08:49 /tmp/build/perf/feature/test-libaio.bin
-rw-rw-r--. 1 acme acme 1165 Nov 26 08:49 /tmp/build/perf/feature/test-libaio.d
-rw-rw-r--. 1 acme acme 0 Nov 26 08:49 /tmp/build/perf/feature/test-libaio.make.output
$
$ grep -i aio /tmp/build/perf/FEATURE-DUMP
feature-libaio=1
$

Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Reviewed-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/5fcda10c-6c63-68df-383a-c6d9e5d1f918@linux.intel.com
[ split from a larger patch ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/build/Makefile.feature | 6 ++++--
tools/build/feature/Makefile | 6 +++++-
tools/build/feature/test-all.c | 5 +++++
tools/build/feature/test-libaio.c | 16 ++++++++++++++++
tools/perf/Makefile.config | 6 ++++++
tools/perf/Makefile.perf | 7 ++++++-
6 files changed, 42 insertions(+), 4 deletions(-)
create mode 100644 tools/build/feature/test-libaio.c

diff --git a/tools/build/Makefile.feature b/tools/build/Makefile.feature
index 8a123834a2a3..d47b8f73e2e7 100644
--- a/tools/build/Makefile.feature
+++ b/tools/build/Makefile.feature
@@ -70,7 +70,8 @@ FEATURE_TESTS_BASIC := \
sched_getcpu \
sdt \
setns \
- libopencsd
+ libopencsd \
+ libaio

# FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
# of all feature tests
@@ -116,7 +117,8 @@ FEATURE_DISPLAY ?= \
zlib \
lzma \
get_cpuid \
- bpf
+ bpf \
+ libaio

# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
# If in the future we need per-feature checks/flags for features not
diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
index 38c22e122cb0..2dbcc0d00f52 100644
--- a/tools/build/feature/Makefile
+++ b/tools/build/feature/Makefile
@@ -61,7 +61,8 @@ FILES= \
test-libopencsd.bin \
test-clang.bin \
test-llvm.bin \
- test-llvm-version.bin
+ test-llvm-version.bin \
+ test-libaio.bin

FILES := $(addprefix $(OUTPUT),$(FILES))

@@ -297,6 +298,9 @@ $(OUTPUT)test-clang.bin:

-include $(OUTPUT)*.d

+$(OUTPUT)test-libaio.bin:
+ $(BUILD) -lrt
+
###############################

clean:
diff --git a/tools/build/feature/test-all.c b/tools/build/feature/test-all.c
index 58f01b950195..20cdaa4fc112 100644
--- a/tools/build/feature/test-all.c
+++ b/tools/build/feature/test-all.c
@@ -174,6 +174,10 @@
# include "test-libopencsd.c"
#undef main

+#define main main_test_libaio
+# include "test-libaio.c"
+#undef main
+
int main(int argc, char *argv[])
{
main_test_libpython();
@@ -214,6 +218,7 @@ int main(int argc, char *argv[])
main_test_sdt();
main_test_setns();
main_test_libopencsd();
+ main_test_libaio();

return 0;
}
diff --git a/tools/build/feature/test-libaio.c b/tools/build/feature/test-libaio.c
new file mode 100644
index 000000000000..932133c9a265
--- /dev/null
+++ b/tools/build/feature/test-libaio.c
@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <aio.h>
+
+int main(void)
+{
+ struct aiocb aiocb;
+
+ aiocb.aio_fildes = 0;
+ aiocb.aio_offset = 0;
+ aiocb.aio_buf = 0;
+ aiocb.aio_nbytes = 0;
+ aiocb.aio_reqprio = 0;
+ aiocb.aio_sigevent.sigev_notify = 1 /*SIGEV_NONE*/;
+
+ return (int)aio_return(&aiocb);
+}
diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index c643d5e0c26b..b66f97a04b12 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -365,6 +365,12 @@ ifeq ($(feature-glibc), 1)
CFLAGS += -DHAVE_GLIBC_SUPPORT
endif

+ifeq ($(feature-libaio), 1)
+ ifndef NO_AIO
+ CFLAGS += -DHAVE_AIO_SUPPORT
+ endif
+endif
+
ifdef NO_DWARF
NO_LIBDW_DWARF_UNWIND := 1
endif
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 239e7b3270f4..67e9adbe6ee8 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -101,8 +101,13 @@ include ../scripts/utilities.mak
# Define LIBCLANGLLVM if you DO want builtin clang and llvm support.
# When selected, pass LLVM_CONFIG=/path/to/llvm-config to `make' if
# llvm-config is not in $PATH.
-
+#
# Define NO_CORESIGHT if you do not want support for CoreSight trace decoding.
+#
+# Define NO_AIO if you do not want support of Posix AIO based trace
+# streaming for record mode. Currently Posix AIO trace streaming is
+# supported only when linking with glibc.
+#

# As per kernel Makefile, avoid funny character set dependencies
unexport LC_ALL
--
2.19.2