leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity
18dcf433f3
linux/drivers/ata
History
Alexander Gordeev 18dcf433f3 AHCI: Optimize single IRQ interrupt processing 
Split interrupt service routine into hardware context handler
and threaded context handler. That allows to protect ports with
individual locks rather than with a single host-wide lock and
move port interrupts handling out of the hardware interrupt
context.

Testing was done by transferring 8GB on two hard drives in
parallel using command 'dd if=/dev/sd{a,b} of=/dev/null'. With
lock_stat statistics I measured access times to ata_host::lock
spinlock (since interrupt handler code is fully embraced with
this lock). The average lock's holdtime decreased eight times
while average waittime decreased two times.

Both before and after the change the transfer time is the same,
while 'perf record -e cycles:k ...' shows 1%-4% CPU time spent
in ahci_single_irq_intr() routine before the update and not even
sampled/shown ahci_single_irq_intr() after the update.

Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: linux-ide@vger.kernel.org
2014-10-06 11:43:36 -04:00
..
acard-ahci.c AHCI: Move host activation code into ahci_host_activate() 2014-10-06 11:43:35 -04:00
ahci_da850.c ata: libahci_platform: move port_map parameters into the AHCI structure 2014-07-30 15:39:46 -04:00
ahci_imx.c ata: libahci_platform: move port_map parameters into the AHCI structure 2014-07-30 15:39:46 -04:00
ahci_mvebu.c ata: libahci_platform: move port_map parameters into the AHCI structure 2014-07-30 15:39:46 -04:00
ahci_platform.c ata: remove deprecated struct ahci_platform_data 2014-08-16 08:35:34 -04:00
ahci_st.c ata: libahci_platform: move port_map parameters into the AHCI structure 2014-07-30 15:39:46 -04:00
ahci_sunxi.c ata: libahci_platform: move port_map parameters into the AHCI structure 2014-07-30 15:39:46 -04:00
ahci_tegra.c ata: libahci_platform: move port_map parameters into the AHCI structure 2014-07-30 15:39:46 -04:00
ahci_xgene.c ahci_xgene: Fix the error print invalid resource for APM X-Gene SoC AHCI SATA Host Controller driver. 2014-09-23 10:07:11 -04:00
ahci.c AHCI: Move host activation code into ahci_host_activate() 2014-10-06 11:43:35 -04:00
ahci.h AHCI: Do not read HOST_IRQ_STAT reg in multi-MSI mode 2014-10-06 11:43:36 -04:00
ata_generic.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
ata_piix.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
Kconfig libata: Use glob_match from lib/glob.c 2014-08-06 18:01:25 -07:00
libahci_platform.c AHCI: Move host activation code into ahci_host_activate() 2014-10-06 11:43:35 -04:00
libahci.c AHCI: Optimize single IRQ interrupt processing 2014-10-06 11:43:36 -04:00
libata-acpi.c ACPI and power management updates for 3.15-rc1 2014-04-01 12:48:54 -07:00
libata-core.c libata: change ata_<foo>_printk routines to return void 2014-09-23 10:02:31 -04:00
libata-eh.c libata: EH should handle AMNF error condition as a media error 2014-07-15 11:13:57 -04:00
libata-pmp.c ata: enable quirk from jmicron JMB350 for JMB394 2014-01-31 07:05:44 -05:00
libata-scsi.c scsi: use 64-bit LUNs 2014-07-17 22:07:37 +02:00
libata-sff.c libata-sff: Fix controllers with no ctl port 2014-09-28 11:19:12 -04:00
libata-transport.c libata: Fix display of sata speed 2013-10-27 07:43:25 -04:00
libata-transport.h [libata] Add ATA transport class 2010-10-21 20:21:03 -04:00
libata-zpodd.c libata: zpodd: eliminate odd_can_poweroff 2014-03-14 11:23:47 -04:00
libata.h scsi: use 64-bit LUNs 2014-07-17 22:07:37 +02:00
Makefile ata: Add support for the Tegra124 SATA controller 2014-07-18 17:52:33 -04:00
pata_acpi.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_ali.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_amd.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_arasan_cf.c pata_arasan_cf: fix ata_host_activate() failure handling 2014-04-14 13:50:03 -04:00
pata_artop.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_at32.c ata: use dev_get_platdata() 2013-07-30 08:59:24 -04:00
pata_at91.c pata_at91: fix ata_host_activate() failure handling 2014-04-02 13:17:31 -04:00
pata_atiixp.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_atp867x.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_bf54x.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_cmd64x.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_cmd640.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_cs5520.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_cs5530.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_cs5535.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_cs5536.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_cypress.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_efar.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_ep93xx.c drivers/ata/pata_ep93xx.c: use signed int type for result of platform_get_irq() 2014-07-17 08:36:13 -04:00
pata_hpt3x2n.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_hpt3x3.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_hpt37x.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_hpt366.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_icside.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pata_imx.c ata: pata_imx: Use the SIMPLE_DEV_PM_OPS() macro 2014-10-04 22:06:57 -04:00
pata_isapnp.c pata_isapnp: Don't use invalid I/O ports 2013-10-07 15:17:32 -04:00
pata_it821x.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_it8213.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_ixp4xx_cf.c DMA-API: others: use dma_set_coherent_mask() 2013-10-31 14:49:07 +00:00
pata_jmicron.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_legacy.c pata_legacy: Remove dead code 2014-03-11 08:30:53 -04:00
pata_macio.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_marvell.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_mpc52xx.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_mpiix.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_netcell.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_ninja32.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_ns87410.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_ns87415.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_octeon_cf.c pata_octeon_cf: use devm_kzalloc() to allocate cf_port 2014-04-14 13:33:28 -04:00
pata_of_platform.c pata_platform: Remove useless irq_flags field 2014-08-23 13:05:08 -04:00
pata_oldpiix.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_opti.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_optidma.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_palmld.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pata_pcmcia.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_pdc202xx_old.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_pdc2027x.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_piccolo.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_platform.c pata_platform: Remove useless irq_flags field 2014-08-23 13:05:08 -04:00
pata_pxa.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_radisys.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_rb532_cf.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pata_rdc.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_rz1000.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_samsung_cf.c ata: pata_samsung_cf: removes s5pc100 related ata codes 2014-06-30 10:48:08 -04:00
pata_sc1200.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_scc.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_sch.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_serverworks.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_sil680.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_sis.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_sl82c105.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_triflex.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pata_via.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
pdc_adma.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
sata_dwc_460ex.c ata: remove superfluous casts 2014-03-26 12:36:53 -04:00
sata_fsl.c ata: Use dma_zalloc_coherent 2014-06-17 10:23:26 -04:00
sata_highbank.c AHCI: Move host activation code into ahci_host_activate() 2014-10-06 11:43:35 -04:00
sata_inic162x.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
sata_mv.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
sata_nv.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
sata_promise.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
sata_promise.h libata annotations and fixes 2008-01-23 05:24:15 -05:00
sata_qstor.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
sata_rcar.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
sata_sil.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
sata_sil24.c sata_sil24: Identify which card suffered IRQ status error 2014-07-22 10:08:31 -04:00
sata_sis.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
sata_svw.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
sata_sx4.c ata: remove superfluous casts 2014-03-26 12:36:53 -04:00
sata_uli.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
sata_via.c ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers 2014-05-09 22:37:49 -04:00
sata_vsc.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
sis.h