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| author | Rickard Green <[email protected]> | 2010-09-04 00:18:45 +0200 |
|---|---|---|
| committer | Rickard Green <[email protected]> | 2010-09-04 00:29:53 +0200 |
| commit | d8e862b5b4a354bdeee2d2b4d6d46024d4aabb0e (patch) | |
| tree | 5573684db6aec82d59af13239e16461f4c61303d /erts/emulator/beam/erl_process.c | |
| parent | 14b1091a4b09e5626aaa63e9d1ea60e829fc829b (diff) | |
| download | otp-d8e862b5b4a354bdeee2d2b4d6d46024d4aabb0e.tar.gz otp-d8e862b5b4a354bdeee2d2b4d6d46024d4aabb0e.tar.bz2 otp-d8e862b5b4a354bdeee2d2b4d6d46024d4aabb0e.zip | |
Add scheduler wakup threshold as command line argument
The scheduler wakeup threshold is now possible to adjust at system boot.
For more information see the `+swt' command line argument of `erl'.
Diffstat (limited to 'erts/emulator/beam/erl_process.c')
| -rw-r--r-- | erts/emulator/beam/erl_process.c | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c index 6e34b25190..901167a315 100644 --- a/erts/emulator/beam/erl_process.c +++ b/erts/emulator/beam/erl_process.c @@ -54,7 +54,12 @@ (ERTS_SCHED_SYS_SLEEP_SPINCOUNT*ERTS_SCHED_TSE_SLEEP_SPINCOUNT_FACT) #define ERTS_SCHED_SUSPEND_SLEEP_SPINCOUNT 0 -#define ERTS_WAKEUP_OTHER_LIMIT (10*CONTEXT_REDS) +#define ERTS_WAKEUP_OTHER_LIMIT_VERY_HIGH (200*CONTEXT_REDS) +#define ERTS_WAKEUP_OTHER_LIMIT_HIGH (50*CONTEXT_REDS) +#define ERTS_WAKEUP_OTHER_LIMIT_MEDIUM (10*CONTEXT_REDS) +#define ERTS_WAKEUP_OTHER_LIMIT_LOW (CONTEXT_REDS) +#define ERTS_WAKEUP_OTHER_LIMIT_VERY_LOW (CONTEXT_REDS/10) + #define ERTS_WAKEUP_OTHER_DEC 10 #define ERTS_WAKEUP_OTHER_FIXED_INC (CONTEXT_REDS/10) @@ -112,6 +117,8 @@ Uint erts_no_schedulers; Uint erts_max_processes = ERTS_DEFAULT_MAX_PROCESSES; Uint erts_process_tab_index_mask; +static int wakeup_other_limit; + #ifdef ERTS_SMP Uint erts_max_main_threads; #endif @@ -2373,7 +2380,27 @@ void erts_early_init_scheduling(void) { early_cpu_bind_init(); + wakeup_other_limit = ERTS_WAKEUP_OTHER_LIMIT_MEDIUM; +} + +int +erts_sched_set_wakeup_limit(char *str) +{ + if (sys_strcmp(str, "very_high") == 0) + wakeup_other_limit = ERTS_WAKEUP_OTHER_LIMIT_VERY_HIGH; + else if (sys_strcmp(str, "high") == 0) + wakeup_other_limit = ERTS_WAKEUP_OTHER_LIMIT_HIGH; + else if (sys_strcmp(str, "medium") == 0) + wakeup_other_limit = ERTS_WAKEUP_OTHER_LIMIT_MEDIUM; + else if (sys_strcmp(str, "low") == 0) + wakeup_other_limit = ERTS_WAKEUP_OTHER_LIMIT_LOW; + else if (sys_strcmp(str, "very_low") == 0) + wakeup_other_limit = ERTS_WAKEUP_OTHER_LIMIT_VERY_LOW; + else + return EINVAL; + return 0; } + void erts_init_scheduling(int mrq, int no_schedulers, int no_schedulers_online) @@ -7169,7 +7196,7 @@ Process *schedule(Process *p, int calls) if (rq->wakeup_other < 0) rq->wakeup_other = 0; } - else if (rq->wakeup_other < ERTS_WAKEUP_OTHER_LIMIT) + else if (rq->wakeup_other < wakeup_other_limit) rq->wakeup_other += rq->len*wo_reds + ERTS_WAKEUP_OTHER_FIXED_INC; else { if (erts_common_run_queue) { |