mirror of
https://github.com/torvalds/linux.git
synced 2026-05-05 23:05:25 -04:00
71388a9f33
Before, 'nstat' was used to retrieve each individual counter: this means querying 4 different sources from /proc/net and iterating over 100+ counters each time. Instead, the stats could be retrieved once, and the output file could be parsed for each counter. Even better, such file is already present: the nstat history file. To be able to get this working, the nstat history file also needs to contains zero counters too, so it is still possible to know if a counter is missing or set to 0. This also simplifies mptcp_connect.sh: instead of checking multiple counters before and after a test to compute the difference, the stats history files can be reset before each test, and nstat can display only the difference. mptcp_lib_get_counter() continues to work when no history file is available: by fetching nstat directly, like before. This is the case in diag.sh and userspace_pm.sh where there is no need to save the history file. This is also the case in mptcp_join.sh, when 'run_tests' is executed in the background: easier to continue fetching counters than updating the history each time it is needed. Note: 'nstat' is called with '-s' in mptcp_lib_nstat_get(), so this helper can be called multiple times during the test if needed. Acked-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> Link: https://patch.msgid.link/20251114-net-next-mptcp-sft-count-cache-stats-timeout-v1-5-863cb04e1b7b@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>