renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-21 19:53:59 +08:00
Code

i40e: scale msix vector use when more cores than vectors

Browse Source 
When there are more cores than vectors available to the PF, scale back
the LAN msix usage to force queue/vector sharing and leave some vectors
for Flow Director, VMDq, etc.

Change-ID: Ie0317732eb85ad8d851d7da7d9af86b1bf8c21ad
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: Patrick Lu <patrick.lu@intel.com>
Tested-by: Jim Young <jamesx.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Shannon Nelson 2014-10-17 03:14:49 +00:00 committed by Jeff Kirsher
parent 7204a785e7
commit c135b0de9b
1 changed files with 7 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/net/ethernet/intel/i40e/i40e_main.c
View File

@ -6699,6 +6699,7 @@ static int i40e_init_msix(struct i40e_pf *pf)
{
i40e_status err = 0;
struct i40e_hw *hw = &pf->hw;
int other_vecs = 0;
int v_budget, i;
int vec;
@ -6724,10 +6725,10 @@ static int i40e_init_msix(struct i40e_pf *pf)
*/
pf->num_lan_msix = pf->num_lan_qps - (pf->rss_size_max - pf->rss_size);
pf->num_vmdq_msix = pf->num_vmdq_qps;
v_budget = 1 + pf->num_lan_msix;
v_budget += (pf->num_vmdq_vsis * pf->num_vmdq_msix);
other_vecs = 1;
other_vecs += (pf->num_vmdq_vsis * pf->num_vmdq_msix);
if (pf->flags & I40E_FLAG_FD_SB_ENABLED)
v_budget++;
other_vecs++;
#ifdef I40E_FCOE
if (pf->flags & I40E_FLAG_FCOE_ENABLED) {
@ -6737,7 +6738,9 @@ static int i40e_init_msix(struct i40e_pf *pf)
#endif
/* Scale down if necessary, and the rings will share vectors */
v_budget = min_t(int, v_budget, hw->func_caps.num_msix_vectors);
pf->num_lan_msix = min_t(int, pf->num_lan_msix,
(hw->func_caps.num_msix_vectors - other_vecs));
v_budget = pf->num_lan_msix + other_vecs;
pf->msix_entries = kcalloc(v_budget, sizeof(struct msix_entry),
GFP_KERNEL);