Author: arybchik
Date: Wed Mar 25 10:12:13 2015
New Revision: 280509
URL: https://svnweb.freebsd.org/changeset/base/280509
Log:
MFC: 277885
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:
stable/10/sys/dev/sfxge/sfxge_tx.h
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/dev/sfxge/sfxge_tx.h
==============================================================================
--- stable/10/sys/dev/sfxge/sfxge_tx.h Wed Mar 25 10:11:17 2015
(r280508)
+++ stable/10/sys/dev/sfxge/sfxge_tx.h Wed Mar 25 10:12:13 2015
(r280509)
@@ -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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