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| author |   Arjan van de Ven <arjan@linux.intel.com> | 2019-06-14 17:29:35 -0700 |
|---|---|---|
| committer |   Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2019-06-28 15:59:52 -0700 |
| commit | ab6973aed6200510662856afce5e3d1e386b7b64 (patch) | |
| tree | 74b592de1acbe608a78732baa5fb426c81ac7bb1 /drivers/net/ethernet/intel/e1000e/netdev.c | |
| parent | iavf: use struct_size() helper (diff) | |
| download | linux-dev-ab6973aed6200510662856afce5e3d1e386b7b64.tar.xz linux-dev-ab6973aed6200510662856afce5e3d1e386b7b64.zip | |
e1000e: Reduce boot time by tightening sleep ranges
The e1000e driver is a great user of the usleep_range() API,
and has nice ranges that in principle help power management.
However the ranges that are used only during system startup are
very long (and can add easily 100 msec to the boot time) while
the power savings of such long ranges is irrelevant due to the
one-off, boot only, nature of these functions.
This patch shrinks some of the longest ranges to be shorter
(while still using a power friendly 1 msec range); this saves
100msec+ of boot time on my BDW NUCs
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/e1000e/netdev.c')
| -rw-r--r-- | drivers/net/ethernet/intel/e1000e/netdev.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c index 2454a3757bf3..f6f73d5347db 100644 --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -3208,7 +3208,7 @@ static void e1000_configure_rx(struct e1000_adapter *adapter) if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX)) ew32(RCTL, rctl & ~E1000_RCTL_EN); e1e_flush(); - usleep_range(10000, 20000); + usleep_range(10000, 11000); if (adapter->flags2 & FLAG2_DMA_BURST) { /* set the writeback threshold (only takes effect if the RDTR @@ -4272,7 +4272,7 @@ void e1000e_down(struct e1000_adapter *adapter, bool reset) /* flush both disables and wait for them to finish */ e1e_flush(); - usleep_range(10000, 20000); + usleep_range(10000, 11000); e1000_irq_disable(adapter); @@ -4310,7 +4310,7 @@ void e1000e_reinit_locked(struct e1000_adapter *adapter) { might_sleep(); while (test_and_set_bit(__E1000_RESETTING, &adapter->state)) - usleep_range(1000, 2000); + usleep_range(1000, 1100); e1000e_down(adapter, true); e1000e_up(adapter); clear_bit(__E1000_RESETTING, &adapter->state); @@ -4707,7 +4707,7 @@ int e1000e_close(struct net_device *netdev) int count = E1000_CHECK_RESET_COUNT; while (test_bit(__E1000_RESETTING, &adapter->state) && count--) - usleep_range(10000, 20000); + usleep_range(10000, 11000); WARN_ON(test_bit(__E1000_RESETTING, &adapter->state)); @@ -6021,7 +6021,7 @@ static int e1000_change_mtu(struct net_device *netdev, int new_mtu) } while (test_and_set_bit(__E1000_RESETTING, &adapter->state)) - usleep_range(1000, 2000); + usleep_range(1000, 1100); /* e1000e_down -> e1000e_reset dependent on max_frame_size & mtu */ adapter->max_frame_size = max_frame; e_info("changing MTU from %d to %d\n", netdev->mtu, new_mtu); @@ -6301,7 +6301,7 @@ static int e1000e_pm_freeze(struct device *dev) int count = E1000_CHECK_RESET_COUNT; while (test_bit(__E1000_RESETTING, &adapter->state) && count--) - usleep_range(10000, 20000); + usleep_range(10000, 11000); WARN_ON(test_bit(__E1000_RESETTING, &adapter->state)); @@ -6716,7 +6716,7 @@ static int e1000e_pm_runtime_suspend(struct device *dev) int count = E1000_CHECK_RESET_COUNT; while (test_bit(__E1000_RESETTING, &adapter->state) && count--) - usleep_range(10000, 20000); + usleep_range(10000, 11000); WARN_ON(test_bit(__E1000_RESETTING, &adapter->state)); |