- Added warning if hyperthreading is enabled.

.check_hyperthreading.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+RED='\033[0;31m'
+CYAN='\033[0;36m'
+YELLOW='\033[1;33m'
+LIGHTRED='\033[1;31m'
+NC='\033[0m' # No Color
+#str=$(grep -o '^flags\b.*: .*\bht\b' /proc/cpuinfo | tail -1)
+nproc=$(grep -i "processor" /proc/cpuinfo | sort -u | wc -l)
+phycore=$(cat /proc/cpuinfo | egrep "core id|physical id" | tr -d "\n" | sed s/physical/\\nphysical/g | grep -v ^$ | sort | uniq | wc -l)
+
+if [ -z "$(echo "$phycore *2" | bc | grep $nproc)" ]
+then
+    str=""
+else
+    str="ht-enabled"
+fi
+
+
+if [ "$str" ]
+then
+    printf "${RED}mTCP works best when hyperthreading is DISABLED. Please disable this feature from BIOS.${NC}\n"
+fi
+
+printf "${CYAN}Type ${YELLOW}make${CYAN} to compile mTCP ${LIGHTRED}src/${CYAN} and ${LIGHTRED}apps/${CYAN}.${NC}\n"

configure

@@ -10981,3 +10981,5 @@ if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != no; then
 $as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;}
 fi
 
+
+bash ./.check_hyperthreading.sh

configure.ac

@@ -121,3 +121,5 @@ AC_OUTPUT(mtcp/src/Makefile)
 AC_OUTPUT(apps/example/Makefile)
 AC_OUTPUT(util/Makefile)
 AC_OUTPUT(io_engine/lib/Makefile)
+
+bash ./.check_hyperthreading.sh