On Mon, Jan 26, 2015 at 7:23 PM, Simon Glass sjg@chromium.org wrote:
On some hardware this time can be significant. Add bootstage support for measuring this. The result can be obtained using 'bootstage report' or passed on to the Linux via the device tree.
Signed-off-by: Simon Glass sjg@chromium.org
common/cmd_scsi.c | 2 ++ include/bootstage.h | 1 + 2 files changed, 3 insertions(+)
diff --git a/common/cmd_scsi.c b/common/cmd_scsi.c index cbc107e..a0a62eb 100644 --- a/common/cmd_scsi.c +++ b/common/cmd_scsi.c @@ -217,8 +217,10 @@ void scsi_init(void) (busdevfunc >> 8) & 0x7); } #endif
bootstage_start(BOOTSTAGE_ID_ACCUM_SCSI, "ahci"); scsi_low_level_init(busdevfunc); scsi_scan(1);bootstage_accum(BOOTSTAGE_ID_ACCUM_SCSI);
This does not cover the case if the platform calls scsi_scan at boot. The first time is the important one as that will include disk spin-up time.
Perhaps they shouldn't be and "scsi scan" should always be in boot scripts.
Rob