X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_ring%2Frte_ring.c;h=2fe402460219db5f91dac2ea3f019408b1d2585d;hb=3031749c2df04a63cdcef186dcce3781e61436e8;hp=8acbbc6538494ff66141d85704ae4250adce3bfb;hpb=e9d48c0072d36eb6423b45fba4ec49d0def6c36f;p=dpdk.git diff --git a/lib/librte_ring/rte_ring.c b/lib/librte_ring/rte_ring.c index 8acbbc6538..2fe4024602 100644 --- a/lib/librte_ring/rte_ring.c +++ b/lib/librte_ring/rte_ring.c @@ -1,13 +1,13 @@ /*- * BSD LICENSE - * + * * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. * All rights reserved. - * + * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: - * + * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright @@ -17,7 +17,7 @@ * * Neither the name of Intel Corporation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. - * + * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR @@ -94,18 +94,29 @@ TAILQ_HEAD(rte_ring_list, rte_ring); /* true if x is a power of 2 */ #define POWEROF2(x) ((((x)-1) & (x)) == 0) -/* create the ring */ -struct rte_ring * -rte_ring_create(const char *name, unsigned count, int socket_id, - unsigned flags) +/* return the size of memory occupied by a ring */ +ssize_t +rte_ring_get_memsize(unsigned count) { - char mz_name[RTE_MEMZONE_NAMESIZE]; - struct rte_ring *r; - const struct rte_memzone *mz; - size_t ring_size; - int mz_flags = 0; - struct rte_ring_list* ring_list = NULL; + ssize_t sz; + + /* count must be a power of 2 */ + if ((!POWEROF2(count)) || (count > RTE_RING_SZ_MASK )) { + RTE_LOG(ERR, RING, + "Requested size is invalid, must be power of 2, and " + "do not exceed the size limit %u\n", RTE_RING_SZ_MASK); + return -EINVAL; + } + sz = sizeof(struct rte_ring) + count * sizeof(void *); + sz = RTE_ALIGN(sz, CACHE_LINE_SIZE); + return sz; +} + +int +rte_ring_init(struct rte_ring *r, const char *name, unsigned count, + unsigned flags) +{ /* compilation-time checks */ RTE_BUILD_BUG_ON((sizeof(struct rte_ring) & CACHE_LINE_MASK) != 0); @@ -122,23 +133,47 @@ rte_ring_create(const char *name, unsigned count, int socket_id, CACHE_LINE_MASK) != 0); #endif + /* init the ring structure */ + memset(r, 0, sizeof(*r)); + rte_snprintf(r->name, sizeof(r->name), "%s", name); + r->flags = flags; + r->prod.watermark = count; + r->prod.sp_enqueue = !!(flags & RING_F_SP_ENQ); + r->cons.sc_dequeue = !!(flags & RING_F_SC_DEQ); + r->prod.size = r->cons.size = count; + r->prod.mask = r->cons.mask = count-1; + r->prod.head = r->cons.head = 0; + r->prod.tail = r->cons.tail = 0; + + return 0; +} + +/* create the ring */ +struct rte_ring * +rte_ring_create(const char *name, unsigned count, int socket_id, + unsigned flags) +{ + char mz_name[RTE_MEMZONE_NAMESIZE]; + struct rte_ring *r; + const struct rte_memzone *mz; + ssize_t ring_size; + int mz_flags = 0; + struct rte_ring_list* ring_list = NULL; + /* check that we have an initialised tail queue */ - if ((ring_list = + if ((ring_list = RTE_TAILQ_LOOKUP_BY_IDX(RTE_TAILQ_RING, rte_ring_list)) == NULL) { rte_errno = E_RTE_NO_TAILQ; - return NULL; + return NULL; } - /* count must be a power of 2 */ - if ((!POWEROF2(count)) || (count > RTE_RING_SZ_MASK )) { - rte_errno = EINVAL; - RTE_LOG(ERR, RING, "Requested size is invalid, must be power of 2, and " - "do not exceed the size limit %u\n", RTE_RING_SZ_MASK); + ring_size = rte_ring_get_memsize(count); + if (ring_size < 0) { + rte_errno = ring_size; return NULL; } - rte_snprintf(mz_name, sizeof(mz_name), "RG_%s", name); - ring_size = count * sizeof(void *) + sizeof(struct rte_ring); + rte_snprintf(mz_name, sizeof(mz_name), "%s%s", RTE_RING_MZ_PREFIX, name); rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK); @@ -148,26 +183,16 @@ rte_ring_create(const char *name, unsigned count, int socket_id, mz = rte_memzone_reserve(mz_name, ring_size, socket_id, mz_flags); if (mz != NULL) { r = mz->addr; - - /* init the ring structure */ - memset(r, 0, sizeof(*r)); - rte_snprintf(r->name, sizeof(r->name), "%s", name); - r->flags = flags; - r->prod.watermark = count; - r->prod.sp_enqueue = !!(flags & RING_F_SP_ENQ); - r->cons.sc_dequeue = !!(flags & RING_F_SC_DEQ); - r->prod.size = r->cons.size = count; - r->prod.mask = r->cons.mask = count-1; - r->prod.head = r->cons.head = 0; - r->prod.tail = r->cons.tail = 0; - + /* no need to check return value here, we already checked the + * arguments above */ + rte_ring_init(r, name, count, flags); TAILQ_INSERT_TAIL(ring_list, r, next); } else { r = NULL; RTE_LOG(ERR, RING, "Cannot reserve memory\n"); } rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK); - + return r; } @@ -191,26 +216,26 @@ rte_ring_set_water_mark(struct rte_ring *r, unsigned count) /* dump the status of the ring on the console */ void -rte_ring_dump(const struct rte_ring *r) +rte_ring_dump(FILE *f, const struct rte_ring *r) { #ifdef RTE_LIBRTE_RING_DEBUG struct rte_ring_debug_stats sum; unsigned lcore_id; #endif - printf("ring <%s>@%p\n", r->name, r); - printf(" flags=%x\n", r->flags); - printf(" size=%"PRIu32"\n", r->prod.size); - printf(" ct=%"PRIu32"\n", r->cons.tail); - printf(" ch=%"PRIu32"\n", r->cons.head); - printf(" pt=%"PRIu32"\n", r->prod.tail); - printf(" ph=%"PRIu32"\n", r->prod.head); - printf(" used=%u\n", rte_ring_count(r)); - printf(" avail=%u\n", rte_ring_free_count(r)); + fprintf(f, "ring <%s>@%p\n", r->name, r); + fprintf(f, " flags=%x\n", r->flags); + fprintf(f, " size=%"PRIu32"\n", r->prod.size); + fprintf(f, " ct=%"PRIu32"\n", r->cons.tail); + fprintf(f, " ch=%"PRIu32"\n", r->cons.head); + fprintf(f, " pt=%"PRIu32"\n", r->prod.tail); + fprintf(f, " ph=%"PRIu32"\n", r->prod.head); + fprintf(f, " used=%u\n", rte_ring_count(r)); + fprintf(f, " avail=%u\n", rte_ring_free_count(r)); if (r->prod.watermark == r->prod.size) - printf(" watermark=0\n"); + fprintf(f, " watermark=0\n"); else - printf(" watermark=%"PRIu32"\n", r->prod.watermark); + fprintf(f, " watermark=%"PRIu32"\n", r->prod.watermark); /* sum and dump statistics */ #ifdef RTE_LIBRTE_RING_DEBUG @@ -227,40 +252,40 @@ rte_ring_dump(const struct rte_ring *r) sum.deq_fail_bulk += r->stats[lcore_id].deq_fail_bulk; sum.deq_fail_objs += r->stats[lcore_id].deq_fail_objs; } - printf(" size=%"PRIu32"\n", r->prod.size); - printf(" enq_success_bulk=%"PRIu64"\n", sum.enq_success_bulk); - printf(" enq_success_objs=%"PRIu64"\n", sum.enq_success_objs); - printf(" enq_quota_bulk=%"PRIu64"\n", sum.enq_quota_bulk); - printf(" enq_quota_objs=%"PRIu64"\n", sum.enq_quota_objs); - printf(" enq_fail_bulk=%"PRIu64"\n", sum.enq_fail_bulk); - printf(" enq_fail_objs=%"PRIu64"\n", sum.enq_fail_objs); - printf(" deq_success_bulk=%"PRIu64"\n", sum.deq_success_bulk); - printf(" deq_success_objs=%"PRIu64"\n", sum.deq_success_objs); - printf(" deq_fail_bulk=%"PRIu64"\n", sum.deq_fail_bulk); - printf(" deq_fail_objs=%"PRIu64"\n", sum.deq_fail_objs); + fprintf(f, " size=%"PRIu32"\n", r->prod.size); + fprintf(f, " enq_success_bulk=%"PRIu64"\n", sum.enq_success_bulk); + fprintf(f, " enq_success_objs=%"PRIu64"\n", sum.enq_success_objs); + fprintf(f, " enq_quota_bulk=%"PRIu64"\n", sum.enq_quota_bulk); + fprintf(f, " enq_quota_objs=%"PRIu64"\n", sum.enq_quota_objs); + fprintf(f, " enq_fail_bulk=%"PRIu64"\n", sum.enq_fail_bulk); + fprintf(f, " enq_fail_objs=%"PRIu64"\n", sum.enq_fail_objs); + fprintf(f, " deq_success_bulk=%"PRIu64"\n", sum.deq_success_bulk); + fprintf(f, " deq_success_objs=%"PRIu64"\n", sum.deq_success_objs); + fprintf(f, " deq_fail_bulk=%"PRIu64"\n", sum.deq_fail_bulk); + fprintf(f, " deq_fail_objs=%"PRIu64"\n", sum.deq_fail_objs); #else - printf(" no statistics available\n"); + fprintf(f, " no statistics available\n"); #endif } /* dump the status of all rings on the console */ void -rte_ring_list_dump(void) +rte_ring_list_dump(FILE *f) { const struct rte_ring *mp; struct rte_ring_list *ring_list; /* check that we have an initialised tail queue */ - if ((ring_list = + if ((ring_list = RTE_TAILQ_LOOKUP_BY_IDX(RTE_TAILQ_RING, rte_ring_list)) == NULL) { rte_errno = E_RTE_NO_TAILQ; - return; + return; } rte_rwlock_read_lock(RTE_EAL_TAILQ_RWLOCK); TAILQ_FOREACH(mp, ring_list, next) { - rte_ring_dump(mp); + rte_ring_dump(f, mp); } rte_rwlock_read_unlock(RTE_EAL_TAILQ_RWLOCK); @@ -274,14 +299,14 @@ rte_ring_lookup(const char *name) struct rte_ring_list *ring_list; /* check that we have an initialized tail queue */ - if ((ring_list = + if ((ring_list = RTE_TAILQ_LOOKUP_BY_IDX(RTE_TAILQ_RING, rte_ring_list)) == NULL) { rte_errno = E_RTE_NO_TAILQ; - return NULL; + return NULL; } rte_rwlock_read_lock(RTE_EAL_TAILQ_RWLOCK); - + TAILQ_FOREACH(r, ring_list, next) { if (strncmp(name, r->name, RTE_RING_NAMESIZE) == 0) break;