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Diffstat (limited to 'tools/perf/Documentation/perf-dlfilter.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-dlfilter.txt | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-dlfilter.txt b/tools/perf/Documentation/perf-dlfilter.txt index 594f5a5a0c9e..fb22e3b31dc5 100644 --- a/tools/perf/Documentation/perf-dlfilter.txt +++ b/tools/perf/Documentation/perf-dlfilter.txt @@ -107,9 +107,31 @@ struct perf_dlfilter_sample { __u64 raw_callchain_nr; /* Number of raw_callchain entries */ const __u64 *raw_callchain; /* Refer <linux/perf_event.h> */ const char *event; + __s32 machine_pid; + __s32 vcpu; }; ---- +Note: 'machine_pid' and 'vcpu' are not original members, but were added together later. +'size' can be used to determine their presence at run time. +PERF_DLFILTER_HAS_MACHINE_PID will be defined if they are present at compile time. +For example: +[source,c] +---- +#include <perf/perf_dlfilter.h> +#include <stddef.h> +#include <stdbool.h> + +static inline bool have_machine_pid(const struct perf_dlfilter_sample *sample) +{ +#ifdef PERF_DLFILTER_HAS_MACHINE_PID + return sample->size >= offsetof(struct perf_dlfilter_sample, vcpu) + sizeof(sample->vcpu); +#else + return false; +#endif +} +---- + The perf_dlfilter_fns structure ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |