[dpdk-dev] [PATCH v2 3/3] app/test/meson: auto detect number of cores

[Aaron Conole]

The arguments being passed will cause failures on laptops that have,
for instance, 2 cores only.  Most of the tests don't require more
than a single core.  Some require multiple cores (but those tests
should be modified to 'SKIP' when the correct number of cores
aren't available).

The unit test results shouldn't be impacted by this change, but it
allows for a future enhancement to pass flags such as '--no-huge'.

Also include a fix to a reported issue with running on FreeBSD.

Signed-off-by: Aaron Conole <aconole at redhat.com>
Reviewed-by: David Marchand <david.marchand at redhat.com>
Acked-by: Luca Boccassi <bluca at debian.org>
---
v2:
* Fix a spelling mistake
* Add support for FreeBSD
* Include a default fallback
* Use a more robust core-mask argument source (rather than lscpu)

Conflicts with http://patches.dpdk.org/patch/50850/

 app/test/meson.build | 35 ++++++++++++++++++++++++++++++++---
 1 file changed, 32 insertions(+), 3 deletions(-)

diff --git a/app/test/meson.build b/app/test/meson.build
index 867cc5863..5e056eb59 100644
--- a/app/test/meson.build
+++ b/app/test/meson.build
@@ -344,17 +344,43 @@ if get_option('tests')
 	timeout_seconds = 600
 	timeout_seconds_fast = 10
 
+	# Retrieve the number of CPU cores, defaulting to 4.
+	num_cores = '0-3'
+	if host_machine.system() == 'linux'
+		num_cores = run_command('cat',
+					'/sys/devices/system/cpu/present'
+				       ).stdout().strip()
+	elif host_machine.system() == 'freebsd'
+		snum_cores = run_command('/sbin/sysctl', '-n',
+					 'hw.ncpu').stdout().strip()
+		inum_cores = snum_cores.to_int() - 1
+                num_cores = '0- at 0@'.format(inum_cores)
+	endif
+
+	num_cores_arg = '-l ' + num_cores
+
+	test_args = [num_cores_arg, '-n 4']
 	foreach arg : fast_parallel_test_names
-		test(arg, dpdk_test,
-			env : ['DPDK_TEST=' + arg],
-			args : ['-c f','-n 4', '--file-prefix=@0@'.format(arg)],
+		if host_machine.system() == 'linux'
+			test(arg, dpdk_test,
+				  env : ['DPDK_TEST=' + arg],
+				  args : test_args +
+					 ['--file-prefix=@0@'.format(arg)],
+			timeout : timeout_seconds_fast,
+			suite : 'fast-tests')
+		else
+			test(arg, dpdk_test,
+				env : ['DPDK_TEST=' + arg],
+				args : test_args,
 			timeout : timeout_seconds_fast,
 			suite : 'fast-tests')
+		endif
 	endforeach
 
 	foreach arg : fast_non_parallel_test_names
 		test(arg, dpdk_test,
 			env : ['DPDK_TEST=' + arg],
+			args : test_args,
 			timeout : timeout_seconds_fast,
 			is_parallel : false,
 			suite : 'fast-tests')
@@ -363,6 +389,7 @@ if get_option('tests')
 	foreach arg : perf_test_names
 		test(arg, dpdk_test,
 		env : ['DPDK_TEST=' + arg],
+		args : test_args,
 		timeout : timeout_seconds,
 		is_parallel : false,
 		suite : 'perf-tests')
@@ -371,6 +398,7 @@ if get_option('tests')
 	foreach arg : driver_test_names
 		test(arg, dpdk_test,
 			env : ['DPDK_TEST=' + arg],
+			args : test_args,
 			timeout : timeout_seconds,
 			is_parallel : false,
 			suite : 'driver-tests')
@@ -379,6 +407,7 @@ if get_option('tests')
 	foreach arg : dump_test_names
 		test(arg, dpdk_test,
 			env : ['DPDK_TEST=' + arg],
+			args : test_args,
 			timeout : timeout_seconds,
 			is_parallel : false,
 			suite : 'debug-tests')
-- 
2.19.1