Author: arybchik
Date: Thu Jan 29 18:52:33 2015
New Revision: 277885
URL: https://svnweb.freebsd.org/changeset/base/277885
Log:
sfxge: Move txq->next pointer to part writable on completion path
In fact the pointer is used only if more than one TXQ is processed in
one interrupt.
It is used (read-write) on completion path only.
Also it makes the first part of the structure smaller and it fits now
into one 128byte cache line. So, TXQ structure becomes 128 bytes smaller.
Sponsored by: Solarflare Communications, Inc.
Approved by: gnn (mentor)
Modified:
head/sys/dev/sfxge/sfxge_tx.h
Modified: head/sys/dev/sfxge/sfxge_tx.h
==============================================================================
--- head/sys/dev/sfxge/sfxge_tx.h Thu Jan 29 18:50:25 2015
(r277884)
+++ head/sys/dev/sfxge/sfxge_tx.h Thu Jan 29 18:52:33 2015
(r277885)
@@ -139,7 +139,6 @@ struct sfxge_txq {
bus_dma_tag_t packet_dma_tag;
efx_buffer_t *pend_desc;
efx_txq_t *common;
- struct sfxge_txq *next;
efsys_mem_t *tsoh_buffer;
@@ -173,6 +172,7 @@ struct sfxge_txq {
*/
unsigned int pending __aligned(CACHE_LINE_SIZE);
unsigned int completed;
+ struct sfxge_txq *next;
};
extern int sfxge_tx_packet_add(struct sfxge_txq *, struct mbuf *);
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