diff options
| -rw-r--r-- | tools/perf/arch/x86/tests/Build | 1 | ||||
| -rw-r--r-- | tools/perf/arch/x86/tests/arch-tests.c | 2 | ||||
| -rw-r--r-- | tools/perf/arch/x86/tests/rdpmc.c | 182 |
3 files changed, 0 insertions, 185 deletions
diff --git a/tools/perf/arch/x86/tests/Build b/tools/perf/arch/x86/tests/Build index 28d793390198..70b5bcbc15df 100644 --- a/tools/perf/arch/x86/tests/Build +++ b/tools/perf/arch/x86/tests/Build @@ -2,7 +2,6 @@ perf-$(CONFIG_DWARF_UNWIND) += regs_load.o perf-$(CONFIG_DWARF_UNWIND) += dwarf-unwind.o perf-y += arch-tests.o -perf-y += rdpmc.o perf-y += sample-parsing.o perf-$(CONFIG_AUXTRACE) += insn-x86.o intel-pt-pkt-decoder-test.o perf-$(CONFIG_X86_64) += bp-modify.o diff --git a/tools/perf/arch/x86/tests/arch-tests.c b/tools/perf/arch/x86/tests/arch-tests.c index 64fb73d14d2f..04018b8aa85b 100644 --- a/tools/perf/arch/x86/tests/arch-tests.c +++ b/tools/perf/arch/x86/tests/arch-tests.c @@ -3,7 +3,6 @@ #include "tests/tests.h" #include "arch-tests.h" -DEFINE_SUITE("x86 rdpmc", rdpmc); #ifdef HAVE_AUXTRACE_SUPPORT DEFINE_SUITE("x86 instruction decoder - new instructions", insn_x86); DEFINE_SUITE("Intel PT packet decoder", intel_pt_pkt_decoder); @@ -14,7 +13,6 @@ DEFINE_SUITE("x86 bp modify", bp_modify); DEFINE_SUITE("x86 Sample parsing", x86_sample_parsing); struct test_suite *arch_tests[] = { - &suite__rdpmc, #ifdef HAVE_DWARF_UNWIND_SUPPORT &suite__dwarf_unwind, #endif diff --git a/tools/perf/arch/x86/tests/rdpmc.c b/tools/perf/arch/x86/tests/rdpmc.c deleted file mode 100644 index 498413ad9c97..000000000000 --- a/tools/perf/arch/x86/tests/rdpmc.c +++ /dev/null @@ -1,182 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -#include <errno.h> -#include <unistd.h> -#include <stdlib.h> -#include <signal.h> -#include <sys/mman.h> -#include <sys/types.h> -#include <sys/wait.h> -#include <linux/string.h> -#include <linux/types.h> -#include "perf-sys.h" -#include "debug.h" -#include "tests/tests.h" -#include "cloexec.h" -#include "event.h" -#include <internal/lib.h> // page_size -#include "arch-tests.h" - -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 & (((u64)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; - char sbuf[STRERR_BUFSIZE]; - - sigfillset(&sa.sa_mask); - sa.sa_sigaction = segfault_handler; - sa.sa_flags = 0; - sigaction(SIGSEGV, &sa, NULL); - - fd = sys_perf_event_open(&attr, 0, -1, -1, - perf_event_open_cloexec_flag()); - if (fd < 0) { - pr_err("Error: sys_perf_event_open() syscall returned " - "with %d (%s)\n", fd, - str_error_r(errno, sbuf, sizeof(sbuf))); - 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", - str_error_r(errno, sbuf, sizeof(sbuf))); - 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(struct test_suite *test __maybe_unused, int subtest __maybe_unused) -{ - 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; -} |