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| author |   David Howells <dhowells@redhat.com> | 2021-12-06 15:54:04 +0000 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2022-01-11 22:13:01 +0000 |
| commit | e6435f1e02f410e3507f02a37c0fbb17971ddc7c (patch) | |
| tree | 43f0de2be43650ee17d48abf7a337f164395ff2a /include/trace/events/fscache.h | |
| parent | fscache: Rewrite documentation (diff) | |
| download | linux-dev-e6435f1e02f410e3507f02a37c0fbb17971ddc7c.tar.xz linux-dev-e6435f1e02f410e3507f02a37c0fbb17971ddc7c.zip | |
fscache: Add a tracepoint for cookie use/unuse
Add a tracepoint to track fscache_use/unuse_cookie().
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
cc: linux-cachefs@redhat.com
Link: https://lore.kernel.org/r/164021588628.640689.12942919367404043608.stgit@warthog.procyon.org.uk/ # v4
Diffstat (limited to '')
| -rw-r--r-- | include/trace/events/fscache.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/include/trace/events/fscache.h b/include/trace/events/fscache.h index 1594aefadeac..cb3fb337e880 100644 --- a/include/trace/events/fscache.h +++ b/include/trace/events/fscache.h @@ -71,6 +71,12 @@ enum fscache_cookie_trace { fscache_cookie_see_work, }; +enum fscache_active_trace { + fscache_active_use, + fscache_active_use_modify, + fscache_active_unuse, +}; + enum fscache_access_trace { fscache_access_acquire_volume, fscache_access_acquire_volume_end, @@ -146,6 +152,11 @@ enum fscache_access_trace { EM(fscache_cookie_see_withdraw, "- x-wth") \ E_(fscache_cookie_see_work, "- work ") +#define fscache_active_traces \ + EM(fscache_active_use, "USE ") \ + EM(fscache_active_use_modify, "USE-m ") \ + E_(fscache_active_unuse, "UNUSE ") + #define fscache_access_traces \ EM(fscache_access_acquire_volume, "BEGIN acq_vol") \ EM(fscache_access_acquire_volume_end, "END acq_vol") \ @@ -264,6 +275,39 @@ TRACE_EVENT(fscache_cookie, __entry->ref) ); +TRACE_EVENT(fscache_active, + TP_PROTO(unsigned int cookie_debug_id, + int ref, + int n_active, + int n_accesses, + enum fscache_active_trace why), + + TP_ARGS(cookie_debug_id, ref, n_active, n_accesses, why), + + TP_STRUCT__entry( + __field(unsigned int, cookie ) + __field(int, ref ) + __field(int, n_active ) + __field(int, n_accesses ) + __field(enum fscache_active_trace, why ) + ), + + TP_fast_assign( + __entry->cookie = cookie_debug_id; + __entry->ref = ref; + __entry->n_active = n_active; + __entry->n_accesses = n_accesses; + __entry->why = why; + ), + + TP_printk("c=%08x %s r=%d a=%d c=%d", + __entry->cookie, + __print_symbolic(__entry->why, fscache_active_traces), + __entry->ref, + __entry->n_accesses, + __entry->n_active) + ); + TRACE_EVENT(fscache_access_cache, TP_PROTO(unsigned int cache_debug_id, int ref, |