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| author | Nick Nunley <nicholasx.d.nunley@intel.com> | 2010-02-17 01:03:19 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-17 13:21:35 -0800 |
| commit | abe1c3638ccf8b68536afb52b111f6ad46d1cf71 (patch) | |
| tree | 3b871785aa37ba60869ce8f7f06dd6f35cb90607 | |
| parent | 2d0b0f693578109aff347e055d47f2797c802261 (diff) | |
| download | kernel_samsung_tuna-abe1c3638ccf8b68536afb52b111f6ad46d1cf71.zip kernel_samsung_tuna-abe1c3638ccf8b68536afb52b111f6ad46d1cf71.tar.gz kernel_samsung_tuna-abe1c3638ccf8b68536afb52b111f6ad46d1cf71.tar.bz2 | |
igb: cap interrupts at 20K per queue when in itr mode 3
In order to maintain similar performance between MSI-X and
legacy/MSI interrupts, this patch reduces the number of interrupts
when receiving small packets to 20K when in interrupt throttle
rate mode 3.
Signed-off-by: Nicholas Nunley <nicholasx.d.nunley@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/igb/igb_main.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c index eb48e1a..4ccc7fc 100644 --- a/drivers/net/igb/igb_main.c +++ b/drivers/net/igb/igb_main.c @@ -3260,6 +3260,10 @@ static void igb_update_ring_itr(struct igb_q_vector *q_vector) else new_val = avg_wire_size / 2; + /* when in itr mode 3 do not exceed 20K ints/sec */ + if (adapter->rx_itr_setting == 3 && new_val < 196) + new_val = 196; + set_itr_val: if (new_val != q_vector->itr_val) { q_vector->itr_val = new_val; |