From 19c5a5f7f15d02395694b32090d1b24c3934c5d8 Mon Sep 17 00:00:00 2001 From: Lukas Larsson Date: Mon, 22 May 2017 17:28:11 +0200 Subject: erts: Use SIGRTMIN on linux for sys_suspend The Linux real-time signal is better used on Linux for suspending schedulers during shutdown as it doesn't collide with SIGUSR2 usage of other applications. --- erts/emulator/beam/erl_bif_info.c | 6 ++++++ erts/emulator/beam/sys.h | 11 ++++++++--- 2 files changed, 14 insertions(+), 3 deletions(-) (limited to 'erts/emulator/beam') diff --git a/erts/emulator/beam/erl_bif_info.c b/erts/emulator/beam/erl_bif_info.c index 2ff95a3338..162d179982 100644 --- a/erts/emulator/beam/erl_bif_info.c +++ b/erts/emulator/beam/erl_bif_info.c @@ -3699,6 +3699,12 @@ BIF_RETTYPE erts_debug_get_internal_state_1(BIF_ALIST_1) Eterm *hp = HAlloc(BIF_P, hsz); BIF_RET(uword_to_big(size, hp)); } + } else if (ERTS_IS_ATOM_STR("scheduler_dump", BIF_ARG_1)) { +#if defined(ERTS_HAVE_TRY_CATCH) && defined(ERTS_SYS_SUSPEND_SIGNAL) + BIF_RET(am_true); +#else + BIF_RET(am_false); +#endif } } else if (is_tuple(BIF_ARG_1)) { diff --git a/erts/emulator/beam/sys.h b/erts/emulator/beam/sys.h index 615f44364b..9dc339053f 100644 --- a/erts/emulator/beam/sys.h +++ b/erts/emulator/beam/sys.h @@ -832,11 +832,16 @@ int erts_sys_unsetenv(char *key); char *erts_read_env(char *key); void erts_free_read_env(void *value); -#if defined(ERTS_THR_HAVE_SIG_FUNCS) && !defined(ETHR_UNUSABLE_SIGUSRX) +#if defined(ERTS_THR_HAVE_SIG_FUNCS) && \ + (!defined(ETHR_UNUSABLE_SIGUSRX) || defined(SIGRTMIN)) extern void sys_thr_resume(erts_tid_t tid); extern void sys_thr_suspend(erts_tid_t tid); -#define ERTS_SYS_SUSPEND_SIGNAL SIGUSR2 -#endif +#ifdef SIGRTMIN +#define ERTS_SYS_SUSPEND_SIGNAL (SIGRTMIN+1) +#else +#define ERTS_SYS_SUSPEND_SIGNAL (SIGUSR2) +#endif /* SIGRTMIN */ +#endif /* HAVE_SIG_FUNCS */ /* utils.c */ -- cgit v1.2.3