mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 16:29:59 +00:00
46996dd7f6
It supports two or more expressions connected as a group and the group
result is considered true when one of them returns true. The new group
operators (GROUP_BEGIN and GROUP_END) are added to setup and check the
condition. As it doesn't allow nested groups, the condition is saved
in local variables.
For example, the following is to get samples only if the data source
memory level is L2 cache or the weight value is greater than 30.
$ sudo ./perf record -adW -e cpu/mem-loads/pp \
> --filter 'mem_lvl == l2 || weight > 30' -- sleep 1
$ sudo ./perf script -F data_src,weight
10668100842 |OP LOAD|LVL L3 or L3 hit|SNP None|TLB L1 or L2 hit|LCK No|BLK N/A 47
11868100242 |OP LOAD|LVL LFB/MAB or LFB/MAB hit|SNP None|TLB L1 or L2 hit|LCK No|BLK N/A 57
10668100842 |OP LOAD|LVL L3 or L3 hit|SNP None|TLB L1 or L2 hit|LCK No|BLK N/A 56
10650100842 |OP LOAD|LVL L3 or L3 hit|SNP None|TLB L2 miss|LCK No|BLK N/A 144
10468100442 |OP LOAD|LVL L2 or L2 hit|SNP None|TLB L1 or L2 hit|LCK No|BLK N/A 16
10468100442 |OP LOAD|LVL L2 or L2 hit|SNP None|TLB L1 or L2 hit|LCK No|BLK N/A 20
11868100242 |OP LOAD|LVL LFB/MAB or LFB/MAB hit|SNP None|TLB L1 or L2 hit|LCK No|BLK N/A 189
1026a100142 |OP LOAD|LVL L1 or L1 hit|SNP None|TLB L1 or L2 hit|LCK Yes|BLK N/A 193
10468100442 |OP LOAD|LVL L2 or L2 hit|SNP None|TLB L1 or L2 hit|LCK No|BLK N/A 18
...
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Hao Luo <haoluo@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: James Clark <james.clark@arm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Song Liu <song@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20230314234237.3008956-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
78 lines
1.3 KiB
Text
78 lines
1.3 KiB
Text
%parse-param {struct list_head *expr_head}
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%define parse.error verbose
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%{
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#include <stdio.h>
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#include <string.h>
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#include <linux/compiler.h>
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#include <linux/list.h>
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#include "bpf-filter.h"
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static void perf_bpf_filter_error(struct list_head *expr __maybe_unused,
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char const *msg)
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{
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printf("perf_bpf_filter: %s\n", msg);
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}
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%}
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%union
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{
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unsigned long num;
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struct {
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unsigned long type;
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int part;
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} sample;
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enum perf_bpf_filter_op op;
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struct perf_bpf_filter_expr *expr;
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}
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%token BFT_SAMPLE BFT_OP BFT_ERROR BFT_NUM BFT_LOGICAL_OR
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%type <expr> filter_term filter_expr
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%destructor { free ($$); } <expr>
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%type <sample> BFT_SAMPLE
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%type <op> BFT_OP
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%type <num> BFT_NUM
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%%
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filter:
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filter ',' filter_term
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{
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list_add_tail(&$3->list, expr_head);
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}
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filter_term
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{
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list_add_tail(&$1->list, expr_head);
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}
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filter_term:
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filter_term BFT_LOGICAL_OR filter_expr
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{
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struct perf_bpf_filter_expr *expr;
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if ($1->op == PBF_OP_GROUP_BEGIN) {
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expr = $1;
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} else {
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expr = perf_bpf_filter_expr__new(0, 0, PBF_OP_GROUP_BEGIN, 1);
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list_add_tail(&$1->list, &expr->groups);
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}
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expr->val++;
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list_add_tail(&$3->list, &expr->groups);
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$$ = expr;
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}
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filter_expr
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{
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$$ = $1;
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}
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filter_expr:
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BFT_SAMPLE BFT_OP BFT_NUM
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{
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$$ = perf_bpf_filter_expr__new($1.type, $1.part, $2, $3);
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}
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%%
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