mirror of
https://github.com/Qortal/Brooklyn.git
synced 2025-01-31 15:22:18 +00:00
a94b3d14aa
Changes included (and more): 1. Dynamic RAM merge 2. Real-time page scan and allocation 3. Cache compression 4. Real-time IRQ checks 5. Dynamic I/O allocation for Java heap 6. Java page migration 7. Contiguous memory allocation 8. Idle pages tracking 9. Per CPU RAM usage tracking 10. ARM NEON scalar multiplication library 11. NEON/ARMv8 crypto extensions 12. NEON SHA, Blake, RIPEMD crypto extensions 13. Parallel NEON crypto engine for multi-algo based CPU stress reduction
114 lines
2.0 KiB
C
114 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* Copyright (c) 2021 Facebook */
|
|
|
|
#include "vmlinux.h"
|
|
#include <bpf/bpf_helpers.h>
|
|
#include "bpf_misc.h"
|
|
|
|
char _license[] SEC("license") = "GPL";
|
|
|
|
struct callback_ctx {
|
|
int output;
|
|
};
|
|
|
|
/* These should be set by the user program */
|
|
u32 nested_callback_nr_loops;
|
|
u32 stop_index = -1;
|
|
u32 nr_loops;
|
|
int pid;
|
|
|
|
/* Making these global variables so that the userspace program
|
|
* can verify the output through the skeleton
|
|
*/
|
|
int nr_loops_returned;
|
|
int g_output;
|
|
int err;
|
|
|
|
static int callback(__u32 index, void *data)
|
|
{
|
|
struct callback_ctx *ctx = data;
|
|
|
|
if (index >= stop_index)
|
|
return 1;
|
|
|
|
ctx->output += index;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int empty_callback(__u32 index, void *data)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int nested_callback2(__u32 index, void *data)
|
|
{
|
|
nr_loops_returned += bpf_loop(nested_callback_nr_loops, callback, data, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nested_callback1(__u32 index, void *data)
|
|
{
|
|
bpf_loop(nested_callback_nr_loops, nested_callback2, data, 0);
|
|
return 0;
|
|
}
|
|
|
|
SEC("fentry/" SYS_PREFIX "sys_nanosleep")
|
|
int test_prog(void *ctx)
|
|
{
|
|
struct callback_ctx data = {};
|
|
|
|
if (bpf_get_current_pid_tgid() >> 32 != pid)
|
|
return 0;
|
|
|
|
nr_loops_returned = bpf_loop(nr_loops, callback, &data, 0);
|
|
|
|
if (nr_loops_returned < 0)
|
|
err = nr_loops_returned;
|
|
else
|
|
g_output = data.output;
|
|
|
|
return 0;
|
|
}
|
|
|
|
SEC("fentry/" SYS_PREFIX "sys_nanosleep")
|
|
int prog_null_ctx(void *ctx)
|
|
{
|
|
if (bpf_get_current_pid_tgid() >> 32 != pid)
|
|
return 0;
|
|
|
|
nr_loops_returned = bpf_loop(nr_loops, empty_callback, NULL, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
SEC("fentry/" SYS_PREFIX "sys_nanosleep")
|
|
int prog_invalid_flags(void *ctx)
|
|
{
|
|
struct callback_ctx data = {};
|
|
|
|
if (bpf_get_current_pid_tgid() >> 32 != pid)
|
|
return 0;
|
|
|
|
err = bpf_loop(nr_loops, callback, &data, 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
SEC("fentry/" SYS_PREFIX "sys_nanosleep")
|
|
int prog_nested_calls(void *ctx)
|
|
{
|
|
struct callback_ctx data = {};
|
|
|
|
if (bpf_get_current_pid_tgid() >> 32 != pid)
|
|
return 0;
|
|
|
|
nr_loops_returned = 0;
|
|
bpf_loop(nr_loops, nested_callback1, &data, 0);
|
|
|
|
g_output = data.output;
|
|
|
|
return 0;
|
|
}
|