1 /*- 2 * Copyright (c) 2012 Konstantin Belousov <kib@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #ifndef _MACHINE_COUNTER_H_ 30 #define _MACHINE_COUNTER_H_ 31 32 #include <sys/pcpu.h> 33 #ifdef INVARIANTS 34 #include <sys/proc.h> 35 #endif 36 37 #define EARLY_COUNTER &__pcpu[0].pc_early_dummy_counter 38 39 #define counter_enter() critical_enter() 40 #define counter_exit() critical_exit() 41 42 #ifdef IN_SUBR_COUNTER_C 43 static inline uint64_t 44 counter_u64_read_one(uint64_t *p, int cpu) 45 { 46 47 return (*(uint64_t *)((char *)p + UMA_PCPU_ALLOC_SIZE * cpu)); 48 } 49 50 static inline uint64_t 51 counter_u64_fetch_inline(uint64_t *p) 52 { 53 uint64_t r; 54 int i; 55 56 r = 0; 57 for (i = 0; i < mp_ncpus; i++) 58 r += counter_u64_read_one((uint64_t *)p, i); 59 60 return (r); 61 } 62 63 /* XXXKIB might interrupt increment */ 64 static void 65 counter_u64_zero_one_cpu(void *arg) 66 { 67 68 *((uint64_t *)((char *)arg + UMA_PCPU_ALLOC_SIZE * 69 PCPU_GET(cpuid))) = 0; 70 } 71 72 static inline void 73 counter_u64_zero_inline(counter_u64_t c) 74 { 75 76 smp_rendezvous(smp_no_rendezvous_barrier, counter_u64_zero_one_cpu, 77 smp_no_rendezvous_barrier, c); 78 } 79 #endif 80 81 #define counter_u64_add_protected(c, inc) do { \ 82 CRITICAL_ASSERT(curthread); \ 83 *(uint64_t *)zpcpu_get(c) += (inc); \ 84 } while (0) 85 86 static inline void 87 counter_u64_add(counter_u64_t c, int64_t inc) 88 { 89 90 counter_enter(); 91 counter_u64_add_protected(c, inc); 92 counter_exit(); 93 } 94 95 #endif /* ! _MACHINE_COUNTER_H_ */ 96