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-rw-r--r--erts/emulator/sys/common/erl_poll.c4
-rw-r--r--erts/etc/unix/cerl.src15
2 files changed, 16 insertions, 3 deletions
diff --git a/erts/emulator/sys/common/erl_poll.c b/erts/emulator/sys/common/erl_poll.c
index 5861b30315..7676d8872a 100644
--- a/erts/emulator/sys/common/erl_poll.c
+++ b/erts/emulator/sys/common/erl_poll.c
@@ -123,8 +123,8 @@ static ERTS_INLINE
int ERTS_SELECT(int nfds, ERTS_fd_set *readfds, ERTS_fd_set *writefds,
ERTS_fd_set *exceptfds, struct timeval *timeout)
{
- ASSERT(!readfds || readfds->sz >= nfds);
- ASSERT(!writefds || writefds->sz >= nfds);
+ ASSERT(!readfds || readfds->sz >= ERTS_FD_SIZE(nfds));
+ ASSERT(!writefds || writefds->sz >= ERTS_FD_SIZE(nfds));
ASSERT(!exceptfds);
return select(nfds,
(readfds ? readfds->ptr : NULL ),
diff --git a/erts/etc/unix/cerl.src b/erts/etc/unix/cerl.src
index 0d45917e4b..41baa323ed 100644
--- a/erts/etc/unix/cerl.src
+++ b/erts/etc/unix/cerl.src
@@ -283,6 +283,19 @@ if [ "x$GDB" = "x" ]; then
else
valgrind_misc_flags="$VALGRIND_MISC_FLAGS"
fi
+ if which taskset > /dev/null && test -e /proc/cpuinfo; then
+ # We only let valgrind utilize one core with "taskset 1" as it can be very slow
+ # on multiple cores (especially with async threads). Valgrind only run one pthread
+ # at a time anyway so there is no point letting it utilize more than one core.
+ # Use $sched_arg to force all schedulers online to emulate multicore.
+ taskset1="taskset 1"
+ ncpu=`cat /proc/cpuinfo | grep -w processor | wc -l`
+ sched_arg="-S$ncpu:$ncpu"
+ else
+ taskset1=
+ sched_arg=
+ fi
+
beam_args=`$EXEC -emu_args_exit ${1+"$@"}`
# Time for some argument passing voodoo:
@@ -293,7 +306,7 @@ if [ "x$GDB" = "x" ]; then
'
set -- $beam_args
IFS="$SAVE_IFS"
- exec valgrind $valgrind_xml $valgrind_log $valgrind_misc_flags $BINDIR/$EMU_NAME $emu_xargs "$@" -pz $PRELOADED
+ exec $taskset1 valgrind $valgrind_xml $valgrind_log $valgrind_misc_flags $BINDIR/$EMU_NAME $sched_arg $emu_xargs "$@" -pz $PRELOADED
else
exec $EXEC $eeargs $xargs ${1+"$@"}
fi