net/mlx5: hw counters: Don't maintain a counter count

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num_counters is only used for deciding whether to grow the bulk query
buffer, which is done once more counters than a small initial threshold
are present. After that, maintaining num_counters serves no purpose.

This commit replaces that with an actual xarray traversal to count the
counters. This appears expensive at first sight, but is only done when
the number of counters is less than the initial threshold (8) and only
once every sampling interval. Once the number of counters goes above the
threshold, the bulk query buffer is grown to max size and the xarray
traversal is never done again.

Signed-off-by: Cosmin Ratiu <cratiu@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20241001103709.58127-6-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Cosmin Ratiu 2024-10-01 13:37:08 +03:00 • committed by Jakub Kicinski

parent d95f77f119

commit 4a67ebf85f

1 changed files with 18 additions and 22 deletions

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drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c

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