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d73bad0685
Enhance the expression parser for more complex metric formulas. - Support python style IF ELSE operators - Add an #SMT_On magic variable for formulas that depend on the SMT status. Example: 4 *( CPU_CLK_UNHALTED.THREAD_ANY / 2 ) if #SMT_on else cycles - Support MIN/MAX operations Example: min(1 , IDQ.MITE_UOPS / ( UPI * 16 * ( ICACHE.HIT + ICACHE.MISSES ) / 4.0 ) ) This is useful to fix up problems caused by multiplexing. - Support | & ^ operators - Minor cleanups and fixes - Support an \ escape for operators. This allows to specify event names like c2-residency - Support @ as an alternative for / to be able to specify pmus without conflicts with operators (like msr/tsc/ as msr@tsc@) Example: (cstate_core@c3\\-residency@ / msr@tsc@) * 100 Signed-off-by: Andi Kleen <ak@linux.intel.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Link: http://lkml.kernel.org/r/20170811232634.30465-8-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
#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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static int test(struct 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))
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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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const char **other;
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double val;
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int ret;
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struct parse_ctx ctx;
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int num_other;
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expr__ctx_init(&ctx);
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expr__add_id(&ctx, "FOO", 1);
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expr__add_id(&ctx, "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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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);
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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);
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TEST_ASSERT_VAL("missing operand", ret == 1);
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TEST_ASSERT_VAL("find other",
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expr__find_other("FOO + BAR + BAZ + BOZO", "FOO", &other, &num_other) == 0);
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TEST_ASSERT_VAL("find other", num_other == 3);
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TEST_ASSERT_VAL("find other", !strcmp(other[0], "BAR"));
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TEST_ASSERT_VAL("find other", !strcmp(other[1], "BAZ"));
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TEST_ASSERT_VAL("find other", !strcmp(other[2], "BOZO"));
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TEST_ASSERT_VAL("find other", other[3] == NULL);
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free((void *)other);
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return 0;
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}
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