diff options
| author | Brett Creeley <brett.creeley@amd.com> | 2023-12-05 00:09:36 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-12-06 07:49:51 +0300 |
| commit | 5858036ca05658051ec61551e6699cca9c7d3369 (patch) | |
| tree | 675d626554586dab6b1a452826730dbf43fb5880 /drivers/net/ethernet/pensando | |
| parent | ab807e9183425ddf6dd85ca622a51fe4cad2c577 (diff) | |
| download | linux-5858036ca05658051ec61551e6699cca9c7d3369.tar.xz | |
ionic: Re-arrange ionic_intr_info struct for cache perf
dim_coal_hw is accessed in the hotpath along with other values
from the first cacheline of ionic_intr_info. So, re-arrange
the structure so the hot path variables are on the first
cacheline.
Before:
struct ionic_intr_info {
char name[32]; /* 0 32 */
unsigned int index; /* 32 4 */
unsigned int vector; /* 36 4 */
u64 rearm_count; /* 40 8 */
unsigned int cpu; /* 48 4 */
/* XXX 4 bytes hole, try to pack */
cpumask_t affinity_mask; /* 56 1024 */
/* --- cacheline 16 boundary (1024 bytes) was 56 bytes ago --- */
u32 dim_coal_hw; /* 1080 4 */
/* size: 1088, cachelines: 17, members: 7 */
/* sum members: 1080, holes: 1, sum holes: 4 */
/* padding: 4 */
};
After:
struct ionic_intr_info {
char name[32]; /* 0 32 */
u64 rearm_count; /* 32 8 */
unsigned int index; /* 40 4 */
unsigned int vector; /* 44 4 */
unsigned int cpu; /* 48 4 */
u32 dim_coal_hw; /* 52 4 */
cpumask_t affinity_mask; /* 56 1024 */
/* size: 1080, cachelines: 17, members: 7 */
/* last cacheline: 56 bytes */
};
Signed-off-by: Brett Creeley <brett.creeley@amd.com>
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
Link: https://lore.kernel.org/r/20231204210936.16587-6-shannon.nelson@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/ethernet/pensando')
| -rw-r--r-- | drivers/net/ethernet/pensando/ionic/ionic_dev.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.h b/drivers/net/ethernet/pensando/ionic/ionic_dev.h index 19edcb42d9fd..cee4e5c3d09a 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_dev.h +++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.h @@ -269,12 +269,12 @@ struct ionic_queue { struct ionic_intr_info { char name[IONIC_INTR_NAME_MAX_SZ]; + u64 rearm_count; unsigned int index; unsigned int vector; - u64 rearm_count; unsigned int cpu; - cpumask_t affinity_mask; u32 dim_coal_hw; + cpumask_t affinity_mask; }; struct ionic_cq { |