perf tests: Move test__rdpmc into separate object
Separating test__rdpmc test from the builtin-test into rdpmc object. Signed-off-by: Jiri Olsa <jolsa@redhat.com> 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/1352508412-16914-7-git-send-email-jolsa@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa
Arnaldo Carvalho de Melo
parent
16d00fee70
commit
bacf7e5d40
|
|
@ -436,6 +436,7 @@ LIB_OBJS += $(OUTPUT)tests/open-syscall.o
|
|||
LIB_OBJS += $(OUTPUT)tests/open-syscall-all-cpus.o
|
||||
LIB_OBJS += $(OUTPUT)tests/mmap-basic.o
|
||||
LIB_OBJS += $(OUTPUT)tests/perf-record.o
|
||||
LIB_OBJS += $(OUTPUT)tests/rdpmc.o
|
||||
LIB_OBJS += $(OUTPUT)tests/util.o
|
||||
|
||||
BUILTIN_OBJS += $(OUTPUT)builtin-annotate.o
|
||||
|
|
|
|||
|
|
@ -30,174 +30,6 @@
|
|||
#include <sched.h>
|
||||
|
||||
|
||||
|
||||
#if defined(__x86_64__) || defined(__i386__)
|
||||
|
||||
#define barrier() asm volatile("" ::: "memory")
|
||||
|
||||
static u64 rdpmc(unsigned int counter)
|
||||
{
|
||||
unsigned int low, high;
|
||||
|
||||
asm volatile("rdpmc" : "=a" (low), "=d" (high) : "c" (counter));
|
||||
|
||||
return low | ((u64)high) << 32;
|
||||
}
|
||||
|
||||
static u64 rdtsc(void)
|
||||
{
|
||||
unsigned int low, high;
|
||||
|
||||
asm volatile("rdtsc" : "=a" (low), "=d" (high));
|
||||
|
||||
return low | ((u64)high) << 32;
|
||||
}
|
||||
|
||||
static u64 mmap_read_self(void *addr)
|
||||
{
|
||||
struct perf_event_mmap_page *pc = addr;
|
||||
u32 seq, idx, time_mult = 0, time_shift = 0;
|
||||
u64 count, cyc = 0, time_offset = 0, enabled, running, delta;
|
||||
|
||||
do {
|
||||
seq = pc->lock;
|
||||
barrier();
|
||||
|
||||
enabled = pc->time_enabled;
|
||||
running = pc->time_running;
|
||||
|
||||
if (enabled != running) {
|
||||
cyc = rdtsc();
|
||||
time_mult = pc->time_mult;
|
||||
time_shift = pc->time_shift;
|
||||
time_offset = pc->time_offset;
|
||||
}
|
||||
|
||||
idx = pc->index;
|
||||
count = pc->offset;
|
||||
if (idx)
|
||||
count += rdpmc(idx - 1);
|
||||
|
||||
barrier();
|
||||
} while (pc->lock != seq);
|
||||
|
||||
if (enabled != running) {
|
||||
u64 quot, rem;
|
||||
|
||||
quot = (cyc >> time_shift);
|
||||
rem = cyc & ((1 << time_shift) - 1);
|
||||
delta = time_offset + quot * time_mult +
|
||||
((rem * time_mult) >> time_shift);
|
||||
|
||||
enabled += delta;
|
||||
if (idx)
|
||||
running += delta;
|
||||
|
||||
quot = count / running;
|
||||
rem = count % running;
|
||||
count = quot * enabled + (rem * enabled) / running;
|
||||
}
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
/*
|
||||
* If the RDPMC instruction faults then signal this back to the test parent task:
|
||||
*/
|
||||
static void segfault_handler(int sig __maybe_unused,
|
||||
siginfo_t *info __maybe_unused,
|
||||
void *uc __maybe_unused)
|
||||
{
|
||||
exit(-1);
|
||||
}
|
||||
|
||||
static int __test__rdpmc(void)
|
||||
{
|
||||
volatile int tmp = 0;
|
||||
u64 i, loops = 1000;
|
||||
int n;
|
||||
int fd;
|
||||
void *addr;
|
||||
struct perf_event_attr attr = {
|
||||
.type = PERF_TYPE_HARDWARE,
|
||||
.config = PERF_COUNT_HW_INSTRUCTIONS,
|
||||
.exclude_kernel = 1,
|
||||
};
|
||||
u64 delta_sum = 0;
|
||||
struct sigaction sa;
|
||||
|
||||
sigfillset(&sa.sa_mask);
|
||||
sa.sa_sigaction = segfault_handler;
|
||||
sigaction(SIGSEGV, &sa, NULL);
|
||||
|
||||
fd = sys_perf_event_open(&attr, 0, -1, -1, 0);
|
||||
if (fd < 0) {
|
||||
pr_err("Error: sys_perf_event_open() syscall returned "
|
||||
"with %d (%s)\n", fd, strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
|
||||
addr = mmap(NULL, page_size, PROT_READ, MAP_SHARED, fd, 0);
|
||||
if (addr == (void *)(-1)) {
|
||||
pr_err("Error: mmap() syscall returned with (%s)\n",
|
||||
strerror(errno));
|
||||
goto out_close;
|
||||
}
|
||||
|
||||
for (n = 0; n < 6; n++) {
|
||||
u64 stamp, now, delta;
|
||||
|
||||
stamp = mmap_read_self(addr);
|
||||
|
||||
for (i = 0; i < loops; i++)
|
||||
tmp++;
|
||||
|
||||
now = mmap_read_self(addr);
|
||||
loops *= 10;
|
||||
|
||||
delta = now - stamp;
|
||||
pr_debug("%14d: %14Lu\n", n, (long long)delta);
|
||||
|
||||
delta_sum += delta;
|
||||
}
|
||||
|
||||
munmap(addr, page_size);
|
||||
pr_debug(" ");
|
||||
out_close:
|
||||
close(fd);
|
||||
|
||||
if (!delta_sum)
|
||||
return -1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int test__rdpmc(void)
|
||||
{
|
||||
int status = 0;
|
||||
int wret = 0;
|
||||
int ret;
|
||||
int pid;
|
||||
|
||||
pid = fork();
|
||||
if (pid < 0)
|
||||
return -1;
|
||||
|
||||
if (!pid) {
|
||||
ret = __test__rdpmc();
|
||||
|
||||
exit(ret);
|
||||
}
|
||||
|
||||
wret = waitpid(pid, &status, 0);
|
||||
if (wret < 0 || status)
|
||||
return -1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
static int test__perf_pmu(void)
|
||||
{
|
||||
return perf_pmu__test();
|
||||
|
|
|
|||
|
|
@ -0,0 +1,175 @@
|
|||
#include <unistd.h>
|
||||
#include <stdlib.h>
|
||||
#include <signal.h>
|
||||
#include <sys/mman.h>
|
||||
#include "types.h"
|
||||
#include "perf.h"
|
||||
#include "debug.h"
|
||||
#include "tests.h"
|
||||
|
||||
#if defined(__x86_64__) || defined(__i386__)
|
||||
|
||||
#define barrier() asm volatile("" ::: "memory")
|
||||
|
||||
static u64 rdpmc(unsigned int counter)
|
||||
{
|
||||
unsigned int low, high;
|
||||
|
||||
asm volatile("rdpmc" : "=a" (low), "=d" (high) : "c" (counter));
|
||||
|
||||
return low | ((u64)high) << 32;
|
||||
}
|
||||
|
||||
static u64 rdtsc(void)
|
||||
{
|
||||
unsigned int low, high;
|
||||
|
||||
asm volatile("rdtsc" : "=a" (low), "=d" (high));
|
||||
|
||||
return low | ((u64)high) << 32;
|
||||
}
|
||||
|
||||
static u64 mmap_read_self(void *addr)
|
||||
{
|
||||
struct perf_event_mmap_page *pc = addr;
|
||||
u32 seq, idx, time_mult = 0, time_shift = 0;
|
||||
u64 count, cyc = 0, time_offset = 0, enabled, running, delta;
|
||||
|
||||
do {
|
||||
seq = pc->lock;
|
||||
barrier();
|
||||
|
||||
enabled = pc->time_enabled;
|
||||
running = pc->time_running;
|
||||
|
||||
if (enabled != running) {
|
||||
cyc = rdtsc();
|
||||
time_mult = pc->time_mult;
|
||||
time_shift = pc->time_shift;
|
||||
time_offset = pc->time_offset;
|
||||
}
|
||||
|
||||
idx = pc->index;
|
||||
count = pc->offset;
|
||||
if (idx)
|
||||
count += rdpmc(idx - 1);
|
||||
|
||||
barrier();
|
||||
} while (pc->lock != seq);
|
||||
|
||||
if (enabled != running) {
|
||||
u64 quot, rem;
|
||||
|
||||
quot = (cyc >> time_shift);
|
||||
rem = cyc & ((1 << time_shift) - 1);
|
||||
delta = time_offset + quot * time_mult +
|
||||
((rem * time_mult) >> time_shift);
|
||||
|
||||
enabled += delta;
|
||||
if (idx)
|
||||
running += delta;
|
||||
|
||||
quot = count / running;
|
||||
rem = count % running;
|
||||
count = quot * enabled + (rem * enabled) / running;
|
||||
}
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
/*
|
||||
* If the RDPMC instruction faults then signal this back to the test parent task:
|
||||
*/
|
||||
static void segfault_handler(int sig __maybe_unused,
|
||||
siginfo_t *info __maybe_unused,
|
||||
void *uc __maybe_unused)
|
||||
{
|
||||
exit(-1);
|
||||
}
|
||||
|
||||
static int __test__rdpmc(void)
|
||||
{
|
||||
volatile int tmp = 0;
|
||||
u64 i, loops = 1000;
|
||||
int n;
|
||||
int fd;
|
||||
void *addr;
|
||||
struct perf_event_attr attr = {
|
||||
.type = PERF_TYPE_HARDWARE,
|
||||
.config = PERF_COUNT_HW_INSTRUCTIONS,
|
||||
.exclude_kernel = 1,
|
||||
};
|
||||
u64 delta_sum = 0;
|
||||
struct sigaction sa;
|
||||
|
||||
sigfillset(&sa.sa_mask);
|
||||
sa.sa_sigaction = segfault_handler;
|
||||
sigaction(SIGSEGV, &sa, NULL);
|
||||
|
||||
fd = sys_perf_event_open(&attr, 0, -1, -1, 0);
|
||||
if (fd < 0) {
|
||||
pr_err("Error: sys_perf_event_open() syscall returned "
|
||||
"with %d (%s)\n", fd, strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
|
||||
addr = mmap(NULL, page_size, PROT_READ, MAP_SHARED, fd, 0);
|
||||
if (addr == (void *)(-1)) {
|
||||
pr_err("Error: mmap() syscall returned with (%s)\n",
|
||||
strerror(errno));
|
||||
goto out_close;
|
||||
}
|
||||
|
||||
for (n = 0; n < 6; n++) {
|
||||
u64 stamp, now, delta;
|
||||
|
||||
stamp = mmap_read_self(addr);
|
||||
|
||||
for (i = 0; i < loops; i++)
|
||||
tmp++;
|
||||
|
||||
now = mmap_read_self(addr);
|
||||
loops *= 10;
|
||||
|
||||
delta = now - stamp;
|
||||
pr_debug("%14d: %14Lu\n", n, (long long)delta);
|
||||
|
||||
delta_sum += delta;
|
||||
}
|
||||
|
||||
munmap(addr, page_size);
|
||||
pr_debug(" ");
|
||||
out_close:
|
||||
close(fd);
|
||||
|
||||
if (!delta_sum)
|
||||
return -1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int test__rdpmc(void)
|
||||
{
|
||||
int status = 0;
|
||||
int wret = 0;
|
||||
int ret;
|
||||
int pid;
|
||||
|
||||
pid = fork();
|
||||
if (pid < 0)
|
||||
return -1;
|
||||
|
||||
if (!pid) {
|
||||
ret = __test__rdpmc();
|
||||
|
||||
exit(ret);
|
||||
}
|
||||
|
||||
wret = waitpid(pid, &status, 0);
|
||||
if (wret < 0 || status)
|
||||
return -1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
|
@ -7,6 +7,7 @@ int test__open_syscall_event(void);
|
|||
int test__open_syscall_event_on_all_cpus(void);
|
||||
int test__basic_mmap(void);
|
||||
int test__PERF_RECORD(void);
|
||||
int test__rdpmc(void);
|
||||
|
||||
/* Util */
|
||||
int trace_event__id(const char *evname);
|
||||
|
|
|
|||
Loading…
Reference in New Issue