[PATCH net-next v4 0/2] net: stmmac: improve driver statistics

Jisheng Zhang
2023-06-26T15:40:17Z

improve the stmmac driver statistics:

1. don't clear network driver statistics in .ndo_close() and
.ndo_open() cycle
2. avoid some network driver statistics overflow on 32 bit platforms
3. use per-queue statistics where necessary to remove frequent
cacheline ping pongs.

NOTE: v1 and v2 are back ported from an internal LTS tree, I made
some mistakes when backporting and squashing. Now, net-next + v3
has been well tested with 'ethtool -s' and 'ip -s link show'.

Since v3:
- coding style pointed out by Simon, I.E reverse xmas tree for local
variable declarations and so on.
- put the counters in queue structs, I.E per-queue rather than per-cpu
- use _irqsave() variant where necessary.

Since v2:
- fix ethtool .get_sset_count, .get_strings and per queue stats
couting.
- fix .ndo_get_stats64 only counts the last cpu's pcpu stats.
- fix typo: s/iff/if in commit msg.
- remove unnecessary if statement brackets since we have removed
one LoC.

Since v1:
- rebase on net-next
- fold two original patches into one patch
- fix issues found by lkp
- update commit msg

Jisheng Zhang (2):
net: stmmac: don't clear network statistics in .ndo_open()
net: stmmac: use per-queue 64 bit statistics where necessary

drivers/net/ethernet/stmicro/stmmac/common.h | 39 ++--
.../net/ethernet/stmicro/stmmac/dwmac-sun8i.c | 12 +-
.../ethernet/stmicro/stmmac/dwmac100_dma.c | 7 +-
.../ethernet/stmicro/stmmac/dwmac4_descs.c | 16 +-
.../net/ethernet/stmicro/stmmac/dwmac4_lib.c | 15 +-
.../net/ethernet/stmicro/stmmac/dwmac_lib.c | 12 +-
.../ethernet/stmicro/stmmac/dwxgmac2_descs.c | 6 +-
.../ethernet/stmicro/stmmac/dwxgmac2_dma.c | 14 +-
.../net/ethernet/stmicro/stmmac/enh_desc.c | 20 +-
drivers/net/ethernet/stmicro/stmmac/hwif.h | 12 +-
.../net/ethernet/stmicro/stmmac/norm_desc.c | 15 +-
drivers/net/ethernet/stmicro/stmmac/stmmac.h | 2 +
.../ethernet/stmicro/stmmac/stmmac_ethtool.c | 123 ++++++++---
.../net/ethernet/stmicro/stmmac/stmmac_main.c | 206 ++++++++++++++----
14 files changed, 337 insertions(+), 162 deletions(-)

--
2.40.1