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perf tests: Remove Intel CQM perf test

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Intel CQM perf test is obsolete for perf PMU code has been removed in
commit c39a0e2c88 ("x86/perf/cqm: Wipe out perf based cqm").

Signed-off-by: Xiaochen Shen <xiaochen.shen@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Pei P Jia <pei.p.jia@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vikas Shivappa <vikas.shivappa@linux.intel.com>
Link: http://lkml.kernel.org/r/1505797057-16300-1-git-send-email-xiaochen.shen@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Xiaochen Shen 2017-09-19 12:57:37 +08:00 committed by Arnaldo Carvalho de Melo
parent 411bc316f3
commit 5c9295bfe6
4 changed files with 0 additions and 133 deletions
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1
tools/perf/arch/x86/include/arch-tests.h
View file

@ -8,7 +8,6 @@ struct test;
int test__rdpmc(struct test *test __maybe_unused, int subtest);
int test__perf_time_to_tsc(struct test *test __maybe_unused, int subtest);
int test__insn_x86(struct test *test __maybe_unused, int subtest);
int test__intel_cqm_count_nmi_context(struct test *test __maybe_unused, int subtest);
#ifdef HAVE_DWARF_UNWIND_SUPPORT
struct thread;

1
tools/perf/arch/x86/tests/Build
View file

@ -5,4 +5,3 @@ libperf-y += arch-tests.o
libperf-y += rdpmc.o
libperf-y += perf-time-to-tsc.o
libperf-$(CONFIG_AUXTRACE) += insn-x86.o
libperf-y += intel-cqm.o

4
tools/perf/arch/x86/tests/arch-tests.c
View file

@ -23,10 +23,6 @@ struct test arch_tests[] = {
.func = test__insn_x86,
},
#endif
{
.desc = "Intel cqm nmi context read",
.func = test__intel_cqm_count_nmi_context,
},
{
.func = NULL,
},

127
tools/perf/arch/x86/tests/intel-cqm.c
View file

@ -1,127 +0,0 @@
#include "tests/tests.h"
#include "perf.h"
#include "cloexec.h"
#include "debug.h"
#include "evlist.h"
#include "evsel.h"
#include "arch-tests.h"
#include <signal.h>
#include <sys/mman.h>
#include <sys/wait.h>
#include <errno.h>
#include <string.h>
static pid_t spawn(void)
{
pid_t pid;
pid = fork();
if (pid)
return pid;
while(1)
sleep(5);
return 0;
}
/*
* Create an event group that contains both a sampled hardware
* (cpu-cycles) and software (intel_cqm/llc_occupancy/) event. We then
* wait for the hardware perf counter to overflow and generate a PMI,
* which triggers an event read for both of the events in the group.
*
* Since reading Intel CQM event counters requires sending SMP IPIs, the
* CQM pmu needs to handle the above situation gracefully, and return
* the last read counter value to avoid triggering a WARN_ON_ONCE() in
* smp_call_function_many() caused by sending IPIs from NMI context.
*/
int test__intel_cqm_count_nmi_context(struct test *test __maybe_unused, int subtest __maybe_unused)
{
struct perf_evlist *evlist = NULL;
struct perf_evsel *evsel = NULL;
struct perf_event_attr pe;
int i, fd[2], flag, ret;
size_t mmap_len;
void *event;
pid_t pid;
int err = TEST_FAIL;
flag = perf_event_open_cloexec_flag();
evlist = perf_evlist__new();
if (!evlist) {
pr_debug("perf_evlist__new failed\n");
return TEST_FAIL;
}
ret = parse_events(evlist, "intel_cqm/llc_occupancy/", NULL);
if (ret) {
pr_debug("parse_events failed, is \"intel_cqm/llc_occupancy/\" available?\n");
err = TEST_SKIP;
goto out;
}
evsel = perf_evlist__first(evlist);
if (!evsel) {
pr_debug("perf_evlist__first failed\n");
goto out;
}
memset(&pe, 0, sizeof(pe));
pe.size = sizeof(pe);
pe.type = PERF_TYPE_HARDWARE;
pe.config = PERF_COUNT_HW_CPU_CYCLES;
pe.read_format = PERF_FORMAT_GROUP;
pe.sample_period = 128;
pe.sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_READ;
pid = spawn();
fd[0] = sys_perf_event_open(&pe, pid, -1, -1, flag);
if (fd[0] < 0) {
pr_debug("failed to open event\n");
goto out;
}
memset(&pe, 0, sizeof(pe));
pe.size = sizeof(pe);
pe.type = evsel->attr.type;
pe.config = evsel->attr.config;
fd[1] = sys_perf_event_open(&pe, pid, -1, fd[0], flag);
if (fd[1] < 0) {
pr_debug("failed to open event\n");
goto out;
}
/*
* Pick a power-of-two number of pages + 1 for the meta-data
* page (struct perf_event_mmap_page). See tools/perf/design.txt.
*/
mmap_len = page_size * 65;
event = mmap(NULL, mmap_len, PROT_READ, MAP_SHARED, fd[0], 0);
if (event == (void *)(-1)) {
pr_debug("failed to mmap %d\n", errno);
goto out;
}
sleep(1);
err = TEST_OK;
munmap(event, mmap_len);
for (i = 0; i < 2; i++)
close(fd[i]);
kill(pid, SIGKILL);
wait(NULL);
out:
perf_evlist__delete(evlist);
return err;
}