perf tests: Add framework for automated perf_event_attr tests
The idea is run perf session with kidnapping sys_perf_event_open function. For each sys_perf_event_open call we store the perf_event_attr data to the file to be checked later against what we expect. You can run this by: $ python ./tests/attr.py -d ./tests/attr/ -p ./perf -v v2 changes: - preserve errno value in the hook Signed-off-by: Jiri Olsa <jolsa@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20121031145247.GB1027@krava.brq.redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa
Arnaldo Carvalho de Melo
parent
945aea220b
commit
52502bf201
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@ -430,6 +430,7 @@ LIB_OBJS += $(OUTPUT)arch/common.o
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LIB_OBJS += $(OUTPUT)tests/parse-events.o
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LIB_OBJS += $(OUTPUT)tests/dso-data.o
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LIB_OBJS += $(OUTPUT)tests/attr.o
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BUILTIN_OBJS += $(OUTPUT)builtin-annotate.o
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BUILTIN_OBJS += $(OUTPUT)builtin-bench.o
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@ -484,6 +484,8 @@ int main(int argc, const char **argv)
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}
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cmd = argv[0];
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test_attr__init();
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/*
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* We use PATH to find perf commands, but we prepend some higher
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* precedence paths: the "--exec-path" option, the PERF_EXEC_PATH
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@ -174,13 +174,25 @@ static inline unsigned long long rdclock(void)
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(void) (&_min1 == &_min2); \
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_min1 < _min2 ? _min1 : _min2; })
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extern bool test_attr__enabled;
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void test_attr__init(void);
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void test_attr__open(struct perf_event_attr *attr, pid_t pid, int cpu,
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int fd, int group_fd, unsigned long flags);
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static inline int
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sys_perf_event_open(struct perf_event_attr *attr,
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pid_t pid, int cpu, int group_fd,
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unsigned long flags)
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{
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return syscall(__NR_perf_event_open, attr, pid, cpu,
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group_fd, flags);
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int fd;
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fd = syscall(__NR_perf_event_open, attr, pid, cpu,
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group_fd, flags);
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if (unlikely(test_attr__enabled))
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test_attr__open(attr, pid, cpu, fd, group_fd, flags);
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return fd;
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}
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#define MAX_COUNTERS 256
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@ -0,0 +1,140 @@
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/*
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* The struct perf_event_attr test support.
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*
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* This test is embedded inside into perf directly and is governed
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* by the PERF_TEST_ATTR environment variable and hook inside
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* sys_perf_event_open function.
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*
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* The general idea is to store 'struct perf_event_attr' details for
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* each event created within single perf command. Each event details
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* are stored into separate text file. Once perf command is finished
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* these files can be checked for values we expect for command.
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*
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* Besides 'struct perf_event_attr' values we also store 'fd' and
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* 'group_fd' values to allow checking for groups created.
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*
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* This all is triggered by setting PERF_TEST_ATTR environment variable.
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* It must contain name of existing directory with access and write
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* permissions. All the event text files are stored there.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <inttypes.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include "../perf.h"
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#include "util.h"
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#define ENV "PERF_TEST_ATTR"
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bool test_attr__enabled;
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static char *dir;
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void test_attr__init(void)
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{
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dir = getenv(ENV);
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test_attr__enabled = (dir != NULL);
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}
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#define BUFSIZE 1024
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#define WRITE_ASS(str, fmt, data) \
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do { \
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char buf[BUFSIZE]; \
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size_t size; \
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\
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size = snprintf(buf, BUFSIZE, #str "=%"fmt "\n", data); \
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if (1 != fwrite(buf, size, 1, file)) { \
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perror("test attr - failed to write event file"); \
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fclose(file); \
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return -1; \
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} \
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\
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} while (0)
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static int store_event(struct perf_event_attr *attr, pid_t pid, int cpu,
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int fd, int group_fd, unsigned long flags)
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{
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FILE *file;
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char path[PATH_MAX];
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snprintf(path, PATH_MAX, "%s/event-%d-%llu-%d", dir,
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attr->type, attr->config, fd);
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file = fopen(path, "w+");
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if (!file) {
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perror("test attr - failed to open event file");
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return -1;
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}
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if (fprintf(file, "[event-%d-%llu-%d]\n",
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attr->type, attr->config, fd) < 0) {
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perror("test attr - failed to write event file");
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fclose(file);
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return -1;
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}
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/* syscall arguments */
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WRITE_ASS(fd, "d", fd);
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WRITE_ASS(group_fd, "d", group_fd);
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WRITE_ASS(cpu, "d", cpu);
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WRITE_ASS(pid, "d", pid);
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WRITE_ASS(flags, "lu", flags);
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/* struct perf_event_attr */
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WRITE_ASS(type, PRIu32, attr->type);
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WRITE_ASS(size, PRIu32, attr->size);
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WRITE_ASS(config, "llu", attr->config);
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WRITE_ASS(sample_period, "llu", attr->sample_period);
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WRITE_ASS(sample_type, "llu", attr->sample_type);
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WRITE_ASS(read_format, "llu", attr->read_format);
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WRITE_ASS(disabled, "d", attr->disabled);
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WRITE_ASS(inherit, "d", attr->inherit);
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WRITE_ASS(pinned, "d", attr->pinned);
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WRITE_ASS(exclusive, "d", attr->exclusive);
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WRITE_ASS(exclude_user, "d", attr->exclude_user);
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WRITE_ASS(exclude_kernel, "d", attr->exclude_kernel);
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WRITE_ASS(exclude_hv, "d", attr->exclude_hv);
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WRITE_ASS(exclude_idle, "d", attr->exclude_idle);
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WRITE_ASS(mmap, "d", attr->mmap);
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WRITE_ASS(comm, "d", attr->comm);
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WRITE_ASS(freq, "d", attr->freq);
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WRITE_ASS(inherit_stat, "d", attr->inherit_stat);
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WRITE_ASS(enable_on_exec, "d", attr->enable_on_exec);
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WRITE_ASS(task, "d", attr->task);
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WRITE_ASS(watermask, "d", attr->watermark);
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WRITE_ASS(precise_ip, "d", attr->precise_ip);
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WRITE_ASS(mmap_data, "d", attr->mmap_data);
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WRITE_ASS(sample_id_all, "d", attr->sample_id_all);
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WRITE_ASS(exclude_host, "d", attr->exclude_host);
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WRITE_ASS(exclude_guest, "d", attr->exclude_guest);
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WRITE_ASS(exclude_callchain_kernel, "d",
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attr->exclude_callchain_kernel);
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WRITE_ASS(exclude_callchain_user, "d",
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attr->exclude_callchain_user);
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WRITE_ASS(wakeup_events, PRIu32, attr->wakeup_events);
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WRITE_ASS(bp_type, PRIu32, attr->bp_type);
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WRITE_ASS(config1, "llu", attr->config1);
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WRITE_ASS(config2, "llu", attr->config2);
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WRITE_ASS(branch_sample_type, "llu", attr->branch_sample_type);
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WRITE_ASS(sample_regs_user, "llu", attr->sample_regs_user);
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WRITE_ASS(sample_stack_user, PRIu32, attr->sample_stack_user);
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WRITE_ASS(optional, "d", 0);
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fclose(file);
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return 0;
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}
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void test_attr__open(struct perf_event_attr *attr, pid_t pid, int cpu,
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int fd, int group_fd, unsigned long flags)
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{
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int errno_saved = errno;
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if (store_event(attr, pid, cpu, fd, group_fd, flags))
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die("test attr FAILED");
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errno = errno_saved;
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}
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@ -0,0 +1,313 @@
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#! /usr/bin/python
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import os
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import sys
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import glob
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import optparse
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import tempfile
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import logging
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import shutil
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import ConfigParser
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class Fail(Exception):
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def __init__(self, test, msg):
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self.msg = msg
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self.test = test
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def getMsg(self):
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return '\'%s\' - %s' % (self.test.path, self.msg)
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class Unsup(Exception):
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def __init__(self, test):
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self.test = test
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def getMsg(self):
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return '\'%s\'' % self.test.path
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class Event(dict):
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terms = [
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'flags',
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'type',
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'size',
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'config',
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'sample_period',
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'sample_type',
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'read_format',
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'disabled',
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'inherit',
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'pinned',
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'exclusive',
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'exclude_user',
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'exclude_kernel',
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'exclude_hv',
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'exclude_idle',
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'mmap',
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'comm',
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'freq',
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'inherit_stat',
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'enable_on_exec',
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'task',
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'watermask',
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'precise_ip',
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'mmap_data',
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'sample_id_all',
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'exclude_host',
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'exclude_guest',
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'exclude_callchain_kernel',
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'exclude_callchain_user',
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'wakeup_events',
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'bp_type',
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'config1',
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'config2',
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'branch_sample_type',
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'sample_regs_user',
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'sample_stack_user',
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]
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def add(self, data):
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for key, val in data:
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log.debug(" %s = %s" % (key, val))
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self[key] = val
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def __init__(self, name, data, base):
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log.info(" Event %s" % name);
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self.name = name;
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self.group = ''
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self.add(base)
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self.add(data)
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def compare_data(self, a, b):
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a_list = a.split('|')
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b_list = b.split('|')
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for a_item in a_list:
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for b_item in b_list:
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if (a_item == b_item):
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return True
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elif (a_item == '*') or (b_item == '*'):
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return True
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return False
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def equal(self, other):
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for t in Event.terms:
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log.debug(" [%s] %s %s" % (t, self[t], other[t]));
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if not self.has_key(t) or not other.has_key(t):
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return False
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if not self.compare_data(self[t], other[t]):
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return False
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return True
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def is_optional(self):
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if self['optional'] == '1':
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return True
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else:
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return False
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class Test(object):
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def __init__(self, path, options):
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parser = ConfigParser.SafeConfigParser()
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parser.read(path)
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log.warning("running '%s'" % path)
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self.path = path
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self.test_dir = options.test_dir
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self.perf = options.perf
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self.command = parser.get('config', 'command')
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self.args = parser.get('config', 'args')
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try:
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self.ret = parser.get('config', 'ret')
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except:
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self.ret = 0
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self.expect = {}
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self.result = {}
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log.info(" loading expected events");
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self.load_events(path, self.expect)
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def is_event(self, name):
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if name.find("event") == -1:
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return False
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else:
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return True
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def load_events(self, path, events):
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parser_event = ConfigParser.SafeConfigParser()
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parser_event.read(path)
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for section in filter(self.is_event, parser_event.sections()):
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parser_items = parser_event.items(section);
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base_items = {}
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if (':' in section):
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base = section[section.index(':') + 1:]
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parser_base = ConfigParser.SafeConfigParser()
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parser_base.read(self.test_dir + '/' + base)
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base_items = parser_base.items('event')
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e = Event(section, parser_items, base_items)
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events[section] = e
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def run_cmd(self, tempdir):
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cmd = "PERF_TEST_ATTR=%s %s %s -o %s/perf.data %s" % (tempdir,
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self.perf, self.command, tempdir, self.args)
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ret = os.WEXITSTATUS(os.system(cmd))
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log.info(" running '%s' ret %d " % (cmd, ret))
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if ret != int(self.ret):
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raise Unsup(self)
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def compare(self, expect, result):
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match = {}
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log.info(" compare");
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# For each expected event find all matching
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# events in result. Fail if there's not any.
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for exp_name, exp_event in expect.items():
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exp_list = []
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log.debug(" matching [%s]" % exp_name)
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for res_name, res_event in result.items():
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log.debug(" to [%s]" % res_name)
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if (exp_event.equal(res_event)):
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exp_list.append(res_name)
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log.debug(" ->OK")
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else:
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log.debug(" ->FAIL");
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log.info(" match: [%s] optional(%d) matches %s" %
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(exp_name, exp_event.is_optional(), str(exp_list)))
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# we did not any matching event - fail
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if (not exp_list) and (not exp_event.is_optional()):
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raise Fail(self, 'match failure');
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match[exp_name] = exp_list
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# For each defined group in the expected events
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# check we match the same group in the result.
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for exp_name, exp_event in expect.items():
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group = exp_event.group
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if (group == ''):
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continue
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# XXX group matching does not account for
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# optional events as above matching does
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for res_name in match[exp_name]:
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res_group = result[res_name].group
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if res_group not in match[group]:
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raise Fail(self, 'group failure')
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log.info(" group: [%s] matches group leader %s" %
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(exp_name, str(match[group])))
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log.info(" matched")
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def resolve_groups(self, events):
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for name, event in events.items():
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group_fd = event['group_fd'];
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if group_fd == '-1':
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continue;
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for iname, ievent in events.items():
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if (ievent['fd'] == group_fd):
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event.group = iname
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log.debug('[%s] has group leader [%s]' % (name, iname))
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break;
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def run(self):
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tempdir = tempfile.mkdtemp();
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# run the test script
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self.run_cmd(tempdir);
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# load events expectation for the test
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log.info(" loading result events");
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for f in glob.glob(tempdir + '/event*'):
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self.load_events(f, self.result);
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# resolve group_fd to event names
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self.resolve_groups(self.expect);
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self.resolve_groups(self.result);
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# do the expectation - results matching - both ways
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self.compare(self.expect, self.result)
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self.compare(self.result, self.expect)
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# cleanup
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shutil.rmtree(tempdir)
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def run_tests(options):
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for f in glob.glob(options.test_dir + '/' + options.test):
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try:
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Test(f, options).run()
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except Unsup, obj:
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log.warning("unsupp %s" % obj.getMsg())
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def setup_log(verbose):
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global log
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level = logging.CRITICAL
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if verbose == 1:
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level = logging.WARNING
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if verbose == 2:
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level = logging.INFO
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if verbose >= 3:
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level = logging.DEBUG
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log = logging.getLogger('test')
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log.setLevel(level)
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ch = logging.StreamHandler()
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ch.setLevel(level)
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formatter = logging.Formatter('%(message)s')
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ch.setFormatter(formatter)
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log.addHandler(ch)
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USAGE = '''%s [OPTIONS]
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-d dir # tests dir
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-p path # perf binary
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-t test # single test
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-v # verbose level
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''' % sys.argv[0]
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def main():
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parser = optparse.OptionParser(usage=USAGE)
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parser.add_option("-t", "--test",
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action="store", type="string", dest="test")
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parser.add_option("-d", "--test-dir",
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action="store", type="string", dest="test_dir")
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parser.add_option("-p", "--perf",
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action="store", type="string", dest="perf")
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parser.add_option("-v", "--verbose",
|
||||
action="count", dest="verbose")
|
||||
|
||||
options, args = parser.parse_args()
|
||||
if args:
|
||||
parser.error('FAILED wrong arguments %s' % ' '.join(args))
|
||||
return -1
|
||||
|
||||
setup_log(options.verbose)
|
||||
|
||||
if not options.test_dir:
|
||||
print 'FAILED no -d option specified'
|
||||
sys.exit(-1)
|
||||
|
||||
if not options.test:
|
||||
options.test = 'test*'
|
||||
|
||||
try:
|
||||
run_tests(options)
|
||||
|
||||
except Fail, obj:
|
||||
print "FAILED %s" % obj.getMsg();
|
||||
sys.exit(-1)
|
||||
|
||||
sys.exit(0)
|
||||
|
||||
if __name__ == '__main__':
|
||||
main()
|
||||
Reference in New Issue