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Shannon Nelson 54a09feb0e [IOAT]: Remove redundant struct member to avoid descriptor cache miss 
The layout for struct ioat_desc_sw is non-optimal and causes an extra
cache hit for every descriptor processed.  By tightening up the struct
layout and removing one item, we pull in the fields that get used in
the speedpath and get a little better performance.


Before:
-------
struct ioat_desc_sw {
	struct ioat_dma_descriptor * hw;                 /*     0     8
*/
	struct list_head           node;                 /*     8    16
*/
	int                        tx_cnt;               /*    24     4
*/

	/* XXX 4 bytes hole, try to pack */

	dma_addr_t                 src;                  /*    32     8
*/
	__u32                      src_len;              /*    40     4
*/

	/* XXX 4 bytes hole, try to pack */

	dma_addr_t                 dst;                  /*    48     8
*/
	__u32                      dst_len;              /*    56     4
*/

	/* XXX 4 bytes hole, try to pack */

	/* --- cacheline 1 boundary (64 bytes) --- */
	struct dma_async_tx_descriptor async_tx;         /*    64   144
*/
	/* --- cacheline 3 boundary (192 bytes) was 16 bytes ago --- */

	/* size: 208, cachelines: 4 */
	/* sum members: 196, holes: 3, sum holes: 12 */
	/* last cacheline: 16 bytes */
};	/* definitions: 1 */


After:
------

struct ioat_desc_sw {
	struct ioat_dma_descriptor * hw;                 /*     0     8
*/
	struct list_head           node;                 /*     8    16
*/
	int                        tx_cnt;               /*    24     4
*/
	__u32                      len;                  /*    28     4
*/
	dma_addr_t                 src;                  /*    32     8
*/
	dma_addr_t                 dst;                  /*    40     8
*/
	struct dma_async_tx_descriptor async_tx;         /*    48   144
*/
	/* --- cacheline 3 boundary (192 bytes) --- */

	/* size: 192, cachelines: 3 */
};	/* definitions: 1 */


Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2007-08-14 17:36:31 -07:00
..
acorn/char Remove the arm26 port 2007-07-31 15:39:39 -07:00
acpi ACPI: EC: Fix "no battery" regression 2007-08-14 01:03:42 -04:00
amba
…
ata [ARM] pata_icside: fix the FIXMEs 2007-08-06 16:10:54 +01:00
atm [ATM] drivers/atm/iphase.c: mostly kmalloc + memset conversion to kzalloc 2007-08-13 22:52:13 -07:00
auxdisplay Use menuconfig objects II - auxdisplay 2007-07-16 09:05:40 -07:00
base CPU online file permission 2007-07-31 15:39:39 -07:00
block sysace: HDIO_GETGEO has it's own method for ages 2007-08-11 22:34:48 +02:00
bluetooth [Bluetooth] Remove the redundant non-seekable llseek method 2007-07-11 06:53:45 +02:00
cdrom [BLOCK] Get rid of request_queue_t typedef 2007-07-24 09:28:11 +02:00
char pull asus sony thinkpad into release branch 2007-08-12 00:17:12 -04:00
clocksource x86_64: fix typo in acpi_pm.c 2007-07-21 18:37:12 -07:00
connector Use menuconfig objects: connector 2007-07-16 09:05:40 -07:00
cpufreq [CPUFREQ] Restore previously used governor on a hot-replugged CPU 2007-07-13 01:29:51 -04:00
crypto Use menuconfig objects: crypto hw 2007-07-16 09:05:40 -07:00
dio
…
dma [IOAT]: Remove redundant struct member to avoid descriptor cache miss 2007-08-14 17:36:31 -07:00
edac drivers/edac: fix pasemi kconfig depends 2007-07-26 11:35:18 -07:00
eisa
…
fc4
…
firewire firewire: fw-core: make two variables static 2007-08-02 20:34:17 +02:00
firmware edd: switch to pci_get based API 2007-07-16 09:05:42 -07:00
hid HID: Never call hid_free_buffers() when usbhid_device has been freed 2007-08-02 13:48:04 +02:00
hwmon hwmon: fscher read control bugfix 2007-07-30 21:14:00 -04:00
i2c i2c-s3c2410: Build fix 2007-08-14 18:37:15 +02:00
ide scc_pata: PIO fixes 2007-08-01 23:46:46 +02:00
ieee1394 ieee1394: sbp2: more correct Kconfig dependencies 2007-08-02 20:34:16 +02:00
infiniband in-string typos of "error" 2007-07-31 15:39:40 -07:00
input [MIPS] Fixup secure computing stuff. 2007-07-31 21:35:21 +01:00
isdn Remove 'isdn_* is defined but unused' warnings 2007-07-31 15:39:44 -07:00
kvm KVM: x86 emulator: fix debug reg mov instructions 2007-08-06 17:54:41 -07:00
leds leds: Convert from struct class_device to struct device 2007-07-16 01:15:51 +01:00
lguest i386: Make patching more robust, fix paravirt issue 2007-08-11 15:58:13 -07:00
macintosh [POWERPC] Clean up duplicate includes in drivers/macintosh/ 2007-07-22 21:31:00 +10:00
mca
…
md Fix remap handling by blktrace 2007-08-11 22:34:48 +02:00
media V4L/DVB (5939): dvb-pll: make struct dvb_pll_fcv1236d static 2007-07-30 16:26:37 -03:00
message Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6 2007-08-06 17:48:34 -07:00
mfd some kmalloc/memset ->kzalloc (tree wide) 2007-07-19 10:04:50 -07:00
misc pull asus sony thinkpad into release branch 2007-08-12 00:17:12 -04:00
mmc mmc: at91_mci: remove whitespace at the end of lines 2007-08-09 16:13:44 +02:00
mtd mtdchar build fix 2007-08-11 15:47:41 -07:00
net Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2007-08-14 09:31:19 -07:00
nubus some kmalloc/memset ->kzalloc (tree wide) 2007-07-19 10:04:50 -07:00
of Create drivers/of/platform.c 2007-07-20 14:25:51 +10:00
oprofile [CELL] oprofile: add support to OProfile for profiling CELL BE SPUs 2007-07-20 21:42:24 +02:00
parisc serial: add early_serial_setup() back to header file 2007-07-18 08:38:22 -07:00
parport parport_pc locking fix 2007-07-31 15:39:37 -07:00
pci pci: rename __pci_reenable_device() to pci_reenable_device() 2007-08-01 10:00:56 -04:00
pcmcia pcmcia: give socket time to power down 2007-07-31 15:39:38 -07:00
pnp ACPI: restore CONFIG_ACPI_SLEEP 2007-07-29 16:53:59 -07:00
power Don't compile the PMU power driver on 64-bit PowerPC 2007-07-23 12:42:45 +01:00
ps3
…
rapidio some kmalloc/memset ->kzalloc (tree wide) 2007-07-19 10:04:50 -07:00
rtc rtc-m48t59 driver NO_IRQ mode fixup 2007-07-31 15:39:44 -07:00
s390 [S390] monwriter: Serialization bug for multithreaded applications. 2007-08-10 14:32:39 +02:00
sbus Videopix Frame Grabber: Fix unreleased lock in vfc_debug() 2007-07-31 15:39:43 -07:00
scsi Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6 2007-08-06 17:48:34 -07:00
serial serial: fix 8250 early console setup 2007-08-03 15:02:56 -07:00
sh some kmalloc/memset ->kzalloc (tree wide) 2007-07-19 10:04:50 -07:00
sn some kmalloc/memset ->kzalloc (tree wide) 2007-07-19 10:04:50 -07:00
spi spidev warning fix 2007-08-11 15:47:42 -07:00
tc zs: move to the serial subsystem 2007-07-18 08:38:22 -07:00
telephony some kmalloc/memset ->kzalloc (tree wide) 2007-07-19 10:04:50 -07:00
uio UIO: Hilscher CIF card driver 2007-07-18 15:57:16 -07:00
usb USB: "sparse" cleanups for usb gadgets 2007-07-30 13:27:47 -07:00
video matroxfb: rectify jitter (G450/G550) 2007-08-11 15:47:40 -07:00
w1 drivers/ misc __iomem annotations 2007-07-26 11:11:57 -07:00
xen xenbus_xs.c: fix a use-after-free 2007-07-26 11:35:17 -07:00
zorro sysfs: add parameter "struct bin_attribute *" in .read/.write methods for sysfs binary attributes 2007-07-11 16:09:09 -07:00
Kconfig Begin to consolidate of_device.c 2007-07-20 13:39:59 +10:00
Makefile [WATCHDOG] Fix pcwd_init_module crash 2007-07-29 18:58:39 +00:00