X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=tests%2Futils%2Futils.sh;h=faa87e783436111793c4e4cea4d771c0491139ae;hp=3c6455e2c4d7ae1e0d7026c1d1798ae1c08ca6b4;hb=e03bdee2bbcb11d3b5c43578b90cdc1d15f8262b;hpb=e0571aa7d88c6607e769e8f723fd5d9e63323b0e

diff --git a/tests/utils/utils.sh b/tests/utils/utils.sh
index 3c6455e2c..faa87e783 100644
--- a/tests/utils/utils.sh
+++ b/tests/utils/utils.sh
@@ -209,6 +209,27 @@ function randstring()
 	echo
 }
 
+# Return a space-separated string of online CPU IDs, based on
+# /sys/devices/system/cpu/online, or from 0 to nproc - 1 otherwise.
+function get_online_cpus()
+{
+	local cpus=()
+	local range_re
+	if [ -f /sys/devices/system/cpu/online ]; then
+		range_re='([0-9]+)-([0-9]+)'
+		while read -r range ; do
+			if [[ "${range}" =~ ${range_re} ]] ; then
+				mapfile -t -O "${#cpus[*]}" cpus <<< $(seq "${BASH_REMATCH[1]}" "${BASH_REMATCH[2]}")
+			else
+				cpus+=("${range}")
+			fi
+		done < <(tr ',' $'\n' < /sys/devices/system/cpu/online)
+	else
+		read -r -a cpus <<< $(seq 0 $(( $(conf_proc_count) - 1 )) )
+	fi
+	echo "${cpus[*]}"
+}
+
 # Helpers for get_possible_cpus.
 function get_possible_cpus_count_from_sysfs_possible_mask()
 {
@@ -281,8 +302,8 @@ function get_exposed_cpus_list()
 # value, e.g. that it could be 0.
 function get_any_available_cpu()
 {
-	for cpu in /sys/devices/system/cpu/cpu[0-9]*; do
-		echo "${cpu#/sys/devices/system/cpu/cpu}"
+	for cpu in $(get_online_cpus); do
+		echo "${cpu}"
 		break;
 	done
 }