diff options
| author | Lin Ming <ming.m.lin@intel.com> | 2012-01-16 13:23:23 +0800 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2012-01-17 20:48:06 -0500 |
| commit | 966f1212e1ac5fe3ddf04479d21488ddb36a2608 (patch) | |
| tree | 86054a1642889b9904faa704504bd098834e91ed /drivers/devfreq | |
| parent | a25a2b84098eb5e001cb8086603d692aa95bf2ec (diff) | |
[libata] enable ata port async suspend
This saves devices suspend/resume time.
Tested system suspend/resume with SATA IDE/AHCI mode 3 times.
Below is the time took for devices suspend/resume.
SATA mode vanilla-kernel patched-kernel
--------- --------------------- ---------------------
IDE suspend: 0.744 suspend: 0.432
(0.716, 0.768, 0.748) (0.440, 0.428, 0.428)
resume: 5.084 resume: 2.209
(5.100, 5.064, 5.088) (2.168, 2.232, 2.228)
AHCI: suspend: 0.725 suspend: 0.449
(0.740, 0.708, 0.728) (0.456, 0.448, 0.444)
resume: 2.556 resume: 1.896
(2.604, 2.492, 2.572) (1.932, 1.872, 1.884)
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/devfreq')
0 files changed, 0 insertions, 0 deletions