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qcacmn: Move locking for qdf_net_buf_debug_look_up to the colision list

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At a cost of keeping 1023 more spinlocks in memory, we can avoid
spinlock contention between different hash keys while performing
the lookup.

Change-Id: Icca2bf0b49186176caf1ea40fb508efa7e7c89b4
CRs-Fixed: 1013620
This commit is contained in:
Houston Hoffman 2016-05-12 16:10:03 -07:00 • committed by Gerrit - the friendly Code Review server
commit e683eea688
1 changed files with 15 additions and 24 deletions
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39
qdf/linux/src/qdf_nbuf.c
View file

@ -528,10 +528,10 @@ struct qdf_nbuf_track_t {
size_t size;
};
spinlock_t g_qdf_net_buf_track_lock;
static spinlock_t g_qdf_net_buf_track_lock[QDF_NET_BUF_TRACK_MAX_SIZE];
typedef struct qdf_nbuf_track_t QDF_NBUF_TRACK;
QDF_NBUF_TRACK *gp_qdf_net_buf_track_tbl[QDF_NET_BUF_TRACK_MAX_SIZE];
static QDF_NBUF_TRACK *gp_qdf_net_buf_track_tbl[QDF_NET_BUF_TRACK_MAX_SIZE];
/**
* qdf_net_buf_debug_init() - initialize network buffer debug functionality
@ -547,16 +547,11 @@ QDF_NBUF_TRACK *gp_qdf_net_buf_track_tbl[QDF_NET_BUF_TRACK_MAX_SIZE];
void qdf_net_buf_debug_init(void)
{
uint32_t i;
unsigned long irq_flag;
spin_lock_init(&g_qdf_net_buf_track_lock);
spin_lock_irqsave(&g_qdf_net_buf_track_lock, irq_flag);
for (i = 0; i < QDF_NET_BUF_TRACK_MAX_SIZE; i++)
for (i = 0; i < QDF_NET_BUF_TRACK_MAX_SIZE; i++) {
gp_qdf_net_buf_track_tbl[i] = NULL;
spin_unlock_irqrestore(&g_qdf_net_buf_track_lock, irq_flag);
spin_lock_init(&g_qdf_net_buf_track_lock[i]);
}
return;
}
@ -576,9 +571,8 @@ void qdf_net_buf_debug_exit(void)
QDF_NBUF_TRACK *p_node;
QDF_NBUF_TRACK *p_prev;
spin_lock_irqsave(&g_qdf_net_buf_track_lock, irq_flag);
for (i = 0; i < QDF_NET_BUF_TRACK_MAX_SIZE; i++) {
spin_lock_irqsave(&g_qdf_net_buf_track_lock[i], irq_flag);
p_node = gp_qdf_net_buf_track_tbl[i];
while (p_node) {
p_prev = p_node;
@ -588,10 +582,9 @@ void qdf_net_buf_debug_exit(void)
p_prev->file_name, p_prev->line_num,
p_prev->size);
}
spin_unlock_irqrestore(&g_qdf_net_buf_track_lock[i], irq_flag);
}
spin_unlock_irqrestore(&g_qdf_net_buf_track_lock, irq_flag);
return;
}
EXPORT_SYMBOL(qdf_net_buf_debug_exit);
@ -608,19 +601,17 @@ void qdf_net_buf_debug_clean(void)
QDF_NBUF_TRACK *p_node;
QDF_NBUF_TRACK *p_prev;
spin_lock_irqsave(&g_qdf_net_buf_track_lock, irq_flag);
for (i = 0; i < QDF_NET_BUF_TRACK_MAX_SIZE; i++) {
spin_lock_irqsave(&g_qdf_net_buf_track_lock[i], irq_flag);
p_node = gp_qdf_net_buf_track_tbl[i];
while (p_node) {
p_prev = p_node;
p_node = p_node->p_next;
qdf_mem_free(p_prev);
}
spin_unlock_irqrestore(&g_qdf_net_buf_track_lock[i], irq_flag);
}
spin_unlock_irqrestore(&g_qdf_net_buf_track_lock, irq_flag);
return;
}
EXPORT_SYMBOL(qdf_net_buf_debug_clean);
@ -681,9 +672,9 @@ void qdf_net_buf_debug_add_node(qdf_nbuf_t net_buf, size_t size,
new_node = (QDF_NBUF_TRACK *) qdf_mem_malloc(sizeof(*new_node));
spin_lock_irqsave(&g_qdf_net_buf_track_lock, irq_flag);
i = qdf_net_buf_debug_hash(net_buf);
spin_lock_irqsave(&g_qdf_net_buf_track_lock[i], irq_flag);
p_node = qdf_net_buf_debug_look_up(net_buf);
if (p_node) {
@ -712,7 +703,7 @@ void qdf_net_buf_debug_add_node(qdf_nbuf_t net_buf, size_t size,
}
done:
spin_unlock_irqrestore(&g_qdf_net_buf_track_lock, irq_flag);
spin_unlock_irqrestore(&g_qdf_net_buf_track_lock[i], irq_flag);
return;
}
@ -732,9 +723,9 @@ void qdf_net_buf_debug_delete_node(qdf_nbuf_t net_buf)
unsigned long irq_flag;
QDF_NBUF_TRACK *p_prev;
spin_lock_irqsave(&g_qdf_net_buf_track_lock, irq_flag);
i = qdf_net_buf_debug_hash(net_buf);
spin_lock_irqsave(&g_qdf_net_buf_track_lock[i], irq_flag);
p_head = gp_qdf_net_buf_track_tbl[i];
/* Unallocated SKB */
@ -770,7 +761,7 @@ done:
QDF_ASSERT(0);
}
spin_unlock_irqrestore(&g_qdf_net_buf_track_lock, irq_flag);
spin_unlock_irqrestore(&g_qdf_net_buf_track_lock[i], irq_flag);
return;
}