mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 11:40:53 +07:00
3e21a28a01
d_ratio avoids division by 0 yielding infinity, such as when a counter
doesn't get scheduled. An example usage is:
{
"BriefDescription": "DCache L1 misses",
"MetricExpr": "d_ratio(MEM_LOAD_RETIRED.L1_MISS, MEM_LOAD_RETIRED.L1_HIT + MEM_LOAD_RETIRED.L1_MISS + MEM_LOAD_RETIRED.FB_HIT)",
"MetricGroup": "DCache;DCache_L1",
"MetricName": "DCache_L1_Miss",
"ScaleUnit": "100%",
}
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200610235823.52557-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
82 lines
2.3 KiB
C
82 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include "util/debug.h"
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#include "util/expr.h"
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#include "tests.h"
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#include <stdlib.h>
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#include <string.h>
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#include <linux/zalloc.h>
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static int test(struct expr_parse_ctx *ctx, const char *e, double val2)
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{
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double val;
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if (expr__parse(&val, ctx, e, 1))
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TEST_ASSERT_VAL("parse test failed", 0);
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TEST_ASSERT_VAL("unexpected value", val == val2);
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return 0;
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}
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int test__expr(struct test *t __maybe_unused, int subtest __maybe_unused)
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{
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const char *p;
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double val, *val_ptr;
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int ret;
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struct expr_parse_ctx ctx;
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expr__ctx_init(&ctx);
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expr__add_id(&ctx, strdup("FOO"), 1);
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expr__add_id(&ctx, strdup("BAR"), 2);
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ret = test(&ctx, "1+1", 2);
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ret |= test(&ctx, "FOO+BAR", 3);
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ret |= test(&ctx, "(BAR/2)%2", 1);
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ret |= test(&ctx, "1 - -4", 5);
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ret |= test(&ctx, "(FOO-1)*2 + (BAR/2)%2 - -4", 5);
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ret |= test(&ctx, "1-1 | 1", 1);
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ret |= test(&ctx, "1-1 & 1", 0);
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ret |= test(&ctx, "min(1,2) + 1", 2);
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ret |= test(&ctx, "max(1,2) + 1", 3);
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ret |= test(&ctx, "1+1 if 3*4 else 0", 2);
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ret |= test(&ctx, "1.1 + 2.1", 3.2);
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ret |= test(&ctx, ".1 + 2.", 2.1);
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ret |= test(&ctx, "d_ratio(1, 2)", 0.5);
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ret |= test(&ctx, "d_ratio(2.5, 0)", 0);
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if (ret)
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return ret;
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p = "FOO/0";
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ret = expr__parse(&val, &ctx, p, 1);
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TEST_ASSERT_VAL("division by zero", ret == -1);
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p = "BAR/";
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ret = expr__parse(&val, &ctx, p, 1);
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TEST_ASSERT_VAL("missing operand", ret == -1);
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expr__ctx_clear(&ctx);
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TEST_ASSERT_VAL("find other",
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expr__find_other("FOO + BAR + BAZ + BOZO", "FOO",
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&ctx, 1) == 0);
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TEST_ASSERT_VAL("find other", hashmap__size(&ctx.ids) == 3);
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TEST_ASSERT_VAL("find other", hashmap__find(&ctx.ids, "BAR",
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(void **)&val_ptr));
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TEST_ASSERT_VAL("find other", hashmap__find(&ctx.ids, "BAZ",
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(void **)&val_ptr));
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TEST_ASSERT_VAL("find other", hashmap__find(&ctx.ids, "BOZO",
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(void **)&val_ptr));
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expr__ctx_clear(&ctx);
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TEST_ASSERT_VAL("find other",
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expr__find_other("EVENT1\\,param\\=?@ + EVENT2\\,param\\=?@",
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NULL, &ctx, 3) == 0);
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TEST_ASSERT_VAL("find other", hashmap__size(&ctx.ids) == 2);
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TEST_ASSERT_VAL("find other", hashmap__find(&ctx.ids, "EVENT1,param=3/",
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(void **)&val_ptr));
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TEST_ASSERT_VAL("find other", hashmap__find(&ctx.ids, "EVENT2,param=3/",
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(void **)&val_ptr));
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expr__ctx_clear(&ctx);
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return 0;
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}
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