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qcacmn: Use qdf_flex_mem for nbuf map metadata

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nbuf map tracking requires a bit of metadata which is currently
allocated dynamically for each mapping request. Change these allocations
to use a qdf_flex_mem pool instead, amortizing each physical allocation
over many mapping requests. This reduces the runtime overhead of the
nbuf map tracking feature, and provides significant memory savings when
MEMORY_DEBUG is also enabled.

Change-Id: Ieef9b996edab135cc2e0252c3a59cb6876f36371
CRs-Fixed: 2232113
This commit is contained in:
Dustin Brown 2018-04-13 16:14:38 -07:00 • committed by nshrivas
commit 8c268a0f54
1 changed files with 13 additions and 6 deletions
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19
qdf/linux/src/qdf_nbuf.c
View file

@ -39,6 +39,7 @@
#include <qdf_atomic.h>
#include <qdf_types.h>
#include <qdf_nbuf.h>
#include "qdf_flex_mem.h"
#include <qdf_mem.h>
#include <qdf_status.h>
#include <qdf_lock.h>
@ -586,10 +587,6 @@ qdf_nbuf_history_add(qdf_nbuf_t nbuf, const char *file, uint32_t line,
event->timestamp = qdf_get_log_timestamp();
}
#define QDF_NBUF_MAP_HT_BITS 10 /* 1024 buckets */
static DECLARE_HASHTABLE(qdf_nbuf_map_ht, QDF_NBUF_MAP_HT_BITS);
static qdf_spinlock_t qdf_nbuf_map_lock;
struct qdf_nbuf_map_metadata {
struct hlist_node node;
qdf_nbuf_t nbuf;
@ -597,8 +594,15 @@ struct qdf_nbuf_map_metadata {
uint32_t line;
};
DEFINE_QDF_FLEX_MEM_POOL(qdf_nbuf_map_pool,
sizeof(struct qdf_nbuf_map_metadata), 0);
#define QDF_NBUF_MAP_HT_BITS 10 /* 1024 buckets */
static DECLARE_HASHTABLE(qdf_nbuf_map_ht, QDF_NBUF_MAP_HT_BITS);
static qdf_spinlock_t qdf_nbuf_map_lock;
static void qdf_nbuf_map_tracking_init(void)
{
qdf_flex_mem_init(&qdf_nbuf_map_pool);
hash_init(qdf_nbuf_map_ht);
qdf_spinlock_create(&qdf_nbuf_map_lock);
}
@ -610,6 +614,8 @@ void qdf_nbuf_map_check_for_leaks(void)
uint32_t count = 0;
bool is_empty;
qdf_flex_mem_release(&qdf_nbuf_map_pool);
qdf_spin_lock_irqsave(&qdf_nbuf_map_lock);
is_empty = hash_empty(qdf_nbuf_map_ht);
qdf_spin_unlock_irqrestore(&qdf_nbuf_map_lock);
@ -641,6 +647,7 @@ static void qdf_nbuf_map_tracking_deinit(void)
{
qdf_nbuf_map_check_for_leaks();
qdf_spinlock_destroy(&qdf_nbuf_map_lock);
qdf_flex_mem_deinit(&qdf_nbuf_map_pool);
}
static struct qdf_nbuf_map_metadata *qdf_nbuf_meta_get(qdf_nbuf_t nbuf)
@ -673,7 +680,7 @@ qdf_nbuf_track_map(qdf_nbuf_t nbuf, const char *file, uint32_t line)
panic("Double nbuf map detected @ %s:%u",
kbasename(file), line);
meta = qdf_mem_malloc(sizeof(*meta));
meta = qdf_flex_mem_alloc(&qdf_nbuf_map_pool);
if (!meta) {
qdf_err("Failed to allocate nbuf map tracking metadata");
return QDF_STATUS_E_NOMEM;
@ -713,7 +720,7 @@ qdf_nbuf_untrack_map(qdf_nbuf_t nbuf, const char *file, uint32_t line)
hash_del(&meta->node);
qdf_spin_unlock_irqrestore(&qdf_nbuf_map_lock);
qdf_mem_free(meta);
qdf_flex_mem_free(&qdf_nbuf_map_pool, meta);
qdf_nbuf_history_add(nbuf, file, line, QDF_NBUF_UNMAP);
}