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Ciro Santilli 六四事件 法轮功
2020-11-20 00:00:00 +00:00
parent 367df352d3
commit 2abb994752
9 changed files with 163 additions and 22 deletions
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24
userland/linux/perf_event_open.c
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@@ -1,12 +1,14 @@
/* https://cirosantilli.com/linux-kernel-module-cheat#perf-event-open
* Adapted from `man perf_event_open` in manpages 5.05-1. */
#define _GNU_SOURCE
#include <asm/unistd.h>
#include <linux/perf_event.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <unistd.h>
#define LKMC_M5OPS_ENABLE 1
@@ -28,10 +30,6 @@ static long perf_event_open(struct perf_event_attr *hw_event,
hw_event->exclude_hv = 1;
ret = syscall(__NR_perf_event_open, hw_event, pid, cpu,
group_fd, flags);
if (ret == -1) {
fprintf(stderr, "Error opening leader %llx\n", hw_event->config);
exit(EXIT_FAILURE);
}
return ret;
}
@@ -50,9 +48,17 @@ main(int argc, char **argv) {
long long count;
uint64_t n;
Desc descs[] = {
/* ARMV8_PMUV3_PERFCTR_PC_WRITE_RETIRED = 0x0C */
DESC(PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_INSTRUCTIONS),
/* ARMV8_PMUV3_PERFCTR_BR_MIS_PRED = 0x10 */
DESC(PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_MISSES),
/* ARMV8_PMUV3_PERFCTR_CPU_CYCLES = 0x11 */
DESC(PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES),
DESC(PERF_TYPE_HARDWARE, PERF_COUNT_HW_REF_CPU_CYCLES),
/* ARMV8_PMUV3_PERFCTR_INST_RETIRED = 0x08 */
DESC(PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS),
DESC(PERF_TYPE_HW_CACHE, PERF_COUNT_HW_CACHE_L1D | PERF_COUNT_HW_CACHE_OP_READ << 8 | PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
};
@@ -70,9 +76,17 @@ main(int argc, char **argv) {
gem5 = 0;
}
for (i = 0; i < LKMC_ARRAY_SIZE(descs); i++)
for (i = 0; i < LKMC_ARRAY_SIZE(descs); i++) {
fds[i] = perf_event_open(&pes[i],
descs[i].type, descs[i].config, 0, -1, -1, 0);
if (fds[i] == -1) {
fprintf(
stderr, "perf_event_open error name=%s type=%zx config=%zx\n",
descs[i].name, (uintmax_t)pes[i].type, (uintmax_t)pes[i].config
);
/*exit(EXIT_FAILURE);*/
}
}
/* Start the counts. */
for (i = 0; i < LKMC_ARRAY_SIZE(descs); i++)