diff options
| -rw-r--r-- | tools/perf/Documentation/perf-record.txt | 15 | ||||
| -rw-r--r-- | tools/perf/util/bpf_counter.c | 3 | ||||
| -rw-r--r-- | tools/perf/util/evlist.c | 25 | ||||
| -rw-r--r-- | tools/perf/util/evsel.c | 2 | ||||
| -rw-r--r-- | tools/perf/util/parse-events.c | 8 | ||||
| -rw-r--r-- | tools/perf/util/python.c | 14 |
6 files changed, 50 insertions, 17 deletions
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index ff815c2f67e8..122f71726eaa 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -119,9 +119,12 @@ OPTIONS "perf report" to view group events together. --filter=<filter>:: - Event filter. This option should follow an event selector (-e) which - selects either tracepoint event(s) or a hardware trace PMU - (e.g. Intel PT or CoreSight). + Event filter. This option should follow an event selector (-e). + If the event is a tracepoint, the filter string will be parsed by + the kernel. If the event is a hardware trace PMU (e.g. Intel PT + or CoreSight), it'll be processed as an address filter. Otherwise + it means a general filter using BPF which can be applied for any + kind of event. - tracepoint filters @@ -176,6 +179,12 @@ OPTIONS Multiple filters can be separated with space or comma. + - bpf filters + + A BPF filter can access the sample data and make a decision based on the + data. Users need to set an appropriate sample type to use the BPF + filter. + --exclude-perf:: Don't record events issued by perf itself. This option should follow an event selector (-e) which selects tracepoint event(s). It adds a diff --git a/tools/perf/util/bpf_counter.c b/tools/perf/util/bpf_counter.c index aa78a15a6f0a..1b77436e067e 100644 --- a/tools/perf/util/bpf_counter.c +++ b/tools/perf/util/bpf_counter.c @@ -763,8 +763,7 @@ extern struct bpf_counter_ops bperf_cgrp_ops; static inline bool bpf_counter_skip(struct evsel *evsel) { - return list_empty(&evsel->bpf_counter_list) && - evsel->follower_skel == NULL; + return evsel->bpf_counter_ops == NULL; } int bpf_counter__install_pe(struct evsel *evsel, int cpu_map_idx, int fd) diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index b74e12239aec..cc491a037836 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -31,6 +31,7 @@ #include "util/evlist-hybrid.h" #include "util/pmu.h" #include "util/sample.h" +#include "util/bpf-filter.h" #include <signal.h> #include <unistd.h> #include <sched.h> @@ -1086,17 +1087,27 @@ int evlist__apply_filters(struct evlist *evlist, struct evsel **err_evsel) int err = 0; evlist__for_each_entry(evlist, evsel) { - if (evsel->filter == NULL) - continue; - /* * filters only work for tracepoint event, which doesn't have cpu limit. * So evlist and evsel should always be same. */ - err = perf_evsel__apply_filter(&evsel->core, evsel->filter); - if (err) { - *err_evsel = evsel; - break; + if (evsel->filter) { + err = perf_evsel__apply_filter(&evsel->core, evsel->filter); + if (err) { + *err_evsel = evsel; + break; + } + } + + /* + * non-tracepoint events can have BPF filters. + */ + if (!list_empty(&evsel->bpf_filters)) { + err = perf_bpf_filter__prepare(evsel); + if (err) { + *err_evsel = evsel; + break; + } } } diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index a83d8cd5eb51..dc3faf005c3b 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -50,6 +50,7 @@ #include "off_cpu.h" #include "../perf-sys.h" #include "util/parse-branch-options.h" +#include "util/bpf-filter.h" #include <internal/xyarray.h> #include <internal/lib.h> #include <internal/threadmap.h> @@ -1517,6 +1518,7 @@ void evsel__exit(struct evsel *evsel) assert(list_empty(&evsel->core.node)); assert(evsel->evlist == NULL); bpf_counter__destroy(evsel); + perf_bpf_filter__destroy(evsel); evsel__free_counts(evsel); perf_evsel__free_fd(&evsel->core); perf_evsel__free_id(&evsel->core); diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 3b2e5bb3e852..6c5cf5244486 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -28,6 +28,7 @@ #include "perf.h" #include "util/parse-events-hybrid.h" #include "util/pmu-hybrid.h" +#include "util/bpf-filter.h" #include "tracepoint.h" #include "thread_map.h" @@ -2542,11 +2543,8 @@ static int set_filter(struct evsel *evsel, const void *arg) perf_pmu__scan_file(pmu, "nr_addr_filters", "%d", &nr_addr_filters); - if (!nr_addr_filters) { - fprintf(stderr, - "This CPU does not support address filtering\n"); - return -1; - } + if (!nr_addr_filters) + return perf_bpf_filter__parse(&evsel->bpf_filters, str); if (evsel__append_addr_filter(evsel, str) < 0) { fprintf(stderr, diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c index be336f1b2b68..0faea4c75eed 100644 --- a/tools/perf/util/python.c +++ b/tools/perf/util/python.c @@ -19,6 +19,7 @@ #include "mmap.h" #include "stat.h" #include "metricgroup.h" +#include "util/bpf-filter.h" #include "util/env.h" #include "util/pmu.h" #include <internal/lib.h> @@ -135,6 +136,19 @@ int bpf_counter__disable(struct evsel *evsel __maybe_unused) return 0; } +// not to drag util/bpf-filter.c +#ifdef HAVE_BPF_SKEL +int perf_bpf_filter__prepare(struct evsel *evsel __maybe_unused) +{ + return 0; +} + +int perf_bpf_filter__destroy(struct evsel *evsel __maybe_unused) +{ + return 0; +} +#endif + /* * Support debug printing even though util/debug.c is not linked. That means * implementing 'verbose' and 'eprintf'. |