AcoSail/kernel_optimize_test
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2640d7c0b8
kernel_optimize_test/drivers/ata
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Matthew Wilcox 2640d7c0b8 AHCI: Remove an unnecessary flush from ahci_qc_issue 
In an I/O heavy workload (IOZone), ahci_qc_issue is the second-highest
consumer of CPU cycles.  Removing the flush gets us approximately 10%
bandwidth improvement.  I believe this to be because the CPU can start
queueing the next request instead of waiting for the readl() to flush the
writes to the device.  The flush isn't necessary because we're using a
'queue' metaphor; we don't guarantee the command has got to the device,
nor do we need to guarantee the command has got to the controller.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-07-14 15:59:34 -04:00
..
ahci.c AHCI: Remove an unnecessary flush from ahci_qc_issue 2008-07-14 15:59:34 -04:00
ata_generic.c pata_atiixp: Don't disable 2008-05-06 11:43:44 -04:00
ata_piix.c ata_piix: add TECRA M4 to broken suspend list 2008-06-18 20:28:17 -04:00
Kconfig LIBATA: Add HAVE_PATA_PLATFORM to select PATA_PLATFORM driver 2008-06-18 20:28:00 -04:00
libata-acpi.c libata-acpi: don't call sleeping function from invalid context 2008-07-11 09:42:03 -04:00
libata-core.c libata: improve EH internal command timeout handling 2008-07-14 15:59:32 -04:00
libata-eh.c libata-eh: update atapi_eh_request_sense() to take @dev instead of @qc 2008-07-14 15:59:33 -04:00
libata-pmp.c libata: improve EH retry delay handling 2008-07-14 15:59:32 -04:00
libata-scsi.c [libata] Add support for VPD page b1 2008-07-14 15:59:33 -04:00
libata-sff.c libata: consistently use msecs for time durations 2008-07-14 15:59:32 -04:00
libata.h libata: improve EH internal command timeout handling 2008-07-14 15:59:32 -04:00
Makefile libata: Add Intel SCH PATA driver 2008-05-06 11:33:58 -04:00
pata_acpi.c pata_atiixp: Don't disable 2008-05-06 11:43:44 -04:00
pata_ali.c ata: remove FIT() macro 2008-05-19 17:30:32 -04:00
pata_amd.c ata: remove FIT() macro 2008-05-19 17:30:32 -04:00
pata_artop.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_at32.c avr32/pata: avoid unnecessary memset (updated after comments) 2008-05-19 17:27:40 -04:00
pata_atiixp.c [libata] pata_atiixp: fix PIO timing data misprogramming 2008-04-29 17:39:45 -04:00
pata_bf54x.c libata: consistently use msecs for time durations 2008-07-14 15:59:32 -04:00
pata_cmd64x.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_cmd640.c libata: rename SFF port ops 2008-04-17 15:44:22 -04:00
pata_cs5520.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_cs5530.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_cs5535.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_cs5536.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_cypress.c ata: remove FIT() macro 2008-05-19 17:30:32 -04:00
pata_efar.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_hpt3x2n.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_hpt3x3.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_hpt37x.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_hpt366.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_icside.c libata-sff: Fix oops reported in kerneloops.org for pnp devices with no ctl 2008-06-04 06:40:41 -04:00
pata_isapnp.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_it821x.c libata: rename SFF port ops 2008-04-17 15:44:22 -04:00
pata_it8213.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_ixp4xx_cf.c ATA/IDE: fix platform driver hotplug/coldplug 2008-04-25 00:45:04 -04:00
pata_jmicron.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_legacy.c ata: endianness annotations in pata drivers 2008-07-14 15:59:33 -04:00
pata_marvell.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_mpc52xx.c libata: rename SFF port ops 2008-04-17 15:44:22 -04:00
pata_mpiix.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_netcell.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_ninja32.c libata: rename SFF port ops 2008-04-17 15:44:22 -04:00
pata_ns87410.c ata: remove FIT() macro 2008-05-19 17:30:32 -04:00
pata_ns87415.c ata: remove FIT() macro 2008-05-19 17:30:32 -04:00
pata_of_platform.c Rename: linux/pata_platform.h to linux/ata_platform.h 2008-02-06 06:54:17 -05:00
pata_oldpiix.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_opti.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_optidma.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_pcmcia.c pcmcia: add another pata/ide ID 2008-06-20 20:53:34 +02:00
pata_pdc202xx_old.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_pdc2027x.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_platform.c ATA/IDE: fix platform driver hotplug/coldplug 2008-04-25 00:45:04 -04:00
pata_qdi.c ata: endianness annotations in pata drivers 2008-07-14 15:59:33 -04:00
pata_radisys.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_rb532_cf.c libata-sff: Fix oops reported in kerneloops.org for pnp devices with no ctl 2008-06-04 06:40:41 -04:00
pata_rz1000.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_sc1200.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_scc.c libata: consistently use msecs for time durations 2008-07-14 15:59:32 -04:00
pata_sch.c libata: Add Intel SCH PATA driver 2008-05-06 11:33:58 -04:00
pata_serverworks.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_sil680.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_sis.c Added Targa Visionary 1000 IDE adapter to pata_sis.c 2008-07-11 09:38:24 -04:00
pata_sl82c105.c drivers/ata: trim trailing whitespace 2008-05-19 17:56:10 -04:00
pata_triflex.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
pata_via.c ata: remove FIT() macro 2008-05-19 17:30:32 -04:00
pata_winbond.c ata: endianness annotations in pata drivers 2008-07-14 15:59:33 -04:00
pdc_adma.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
sata_fsl.c [libata] sata_fsl: Fix broken driver, add port multiplier (PMP) support 2008-05-30 12:39:44 -04:00
sata_inic162x.c sata_inic162x: update intro comment, up the version and drop EXPERIMENTAL 2008-05-06 11:40:57 -04:00
sata_mv.c sata_mv: safer logic for limit_warnings 2008-07-04 09:07:12 -04:00
sata_nv.c sata_nv: make hardreset return -EAGAIN on success 2008-04-25 00:45:48 -04:00
sata_promise.c sata_promise: other cleanups 2008-05-19 17:31:34 -04:00
sata_promise.h libata annotations and fixes 2008-01-23 05:24:15 -05:00
sata_qstor.c libata: rename SFF functions 2008-04-17 15:44:21 -04:00
sata_sil24.c sata_sil24: add DID for another adaptec flavor 2008-07-04 09:05:43 -04:00
sata_sil.c libata: rename SFF port ops 2008-04-17 15:44:22 -04:00
sata_sis.c sata_sis: SCR accessors return -EINVAL when requested SCR isn't available 2008-04-24 23:42:47 -04:00
sata_svw.c [libata] sata_svw: update code comments relating to data corruption 2008-07-14 15:59:33 -04:00
sata_sx4.c libata: add qc_fill_rtf port operation 2008-04-17 15:44:23 -04:00
sata_uli.c sata_uli: hardreset is broken 2008-06-27 02:57:48 -04:00
sata_via.c libata: restructure SFF post-reset readiness waits 2008-04-17 15:44:22 -04:00
sata_vsc.c libata: rename SFF port ops 2008-04-17 15:44:22 -04:00
sis.h libata: PATA-mode fixes for sis_sata 2007-07-02 10:17:42 -04:00