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sethdusek/lib.rs

Created July 14, 2017 02:41
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Raw
lib.rs
extern crate libc;
pub mod zc;
Raw
main.rs
extern crate libc;
mod zc;
use zc::ZeroCopy;
use std::fs::File;
fn main() {
let mut file = File::open("/tmp/foo").unwrap();
let mut file_write = File::create("/tmp/foo.txt").unwrap();
unsafe { file.copy_to_fd(&mut file_write).unwrap(); }
}
Raw
test.rs
#![feature(test)]
extern crate test;
extern crate zerocopy;
use zerocopy::zc::ZeroCopy;
use test::Bencher;
use std::io::prelude::*;
use std::fs::File;
#[bench]
fn zerocopy(b: &mut Bencher) {
let mut src = File::open("/tmp/foo").unwrap();
let mut dest = File::create("/tmp/foo.txt").unwrap();
b.iter(|| {
unsafe { src.copy_to_fd(&mut dest).unwrap() };
});
std::fs::remove_file("/tmp/foo.txt");
}
#[bench]
fn default(b: &mut Bencher) {
let mut src = File::open("/tmp/foo").unwrap();
let mut dest = File::create("/tmp/foo.txt").unwrap();
b.iter(|| {
std::io::copy(&mut src, &mut dest).unwrap();
});
std::fs::remove_file("/tmp/foo.txt");
}
Raw
zc.rs
use libc::{c_int, splice};
use std::os::unix::io::AsRawFd;
use std::io::Result;
use std::io::prelude::*;
const __NR_copy_file_range: ::libc::c_long = 326;
unsafe fn copy_file_range(fd_in: c_int, off_in: *mut ::libc::loff_t, fd_out: c_int, off_out: *mut ::libc::loff_t, len: usize, flags: u32) -> i64 {
::libc::syscall(__NR_copy_file_range, fd_in, off_in, fd_out, off_out, len, flags)
}
pub trait ZeroCopy<T> {
unsafe fn copy_to_fd(&mut self, fd: &mut T) -> Result<u64>;
}
/*impl <T> ZeroCopy for T where T: AsRawFd + Read {
unsafe fn copy_to_fd<FD: AsRawFd + Write>(&mut self, fd: &mut FD) -> Result<u64> {
let res = splice(0, ::std::ptr::null_mut(), fd.as_raw_fd(), ::std::ptr::null_mut(), 12, 0);
Ok(res as u64)
}
}*/
impl ZeroCopy<::std::fs::File> for ::std::fs::File {
unsafe fn copy_to_fd(&mut self, fd: &mut ::std::fs::File) -> Result<u64> {
//let len = fd.metadata()?.len() as usize;
let bytes = copy_file_range(self.as_raw_fd(), ::std::ptr::null_mut(), fd.as_raw_fd(), ::std::ptr::null_mut(), 1024, 0);
if bytes < 0 {
Err(::std::io::Error::last_os_error())
}
else { Ok(bytes as u64) }
}
}
Raw
zsh
c%
kamal@elitebook  ~/r/zerocopy   master ± cargo run
Compiling zerocopy v0.1.0 (file:///home/kamal/rust/zerocopy)
warning: unused import: `c_int`
--> src/zc.rs:1:12
|
kamal@elitebook  ~/r/zerocopy   master ± cat /tmp/foo.txt
kamal@elitebook  ~/r/zerocopy   master ± rm /tmp/foo.txt
kamal@elitebook  ~/r/zerocopy   master ± ls
src target Cargo.lock Cargo.toml
kamal@elitebook  ~/r/zerocopy   master ± cargo run
Compiling zerocopy v0.1.0 (file:///home/kamal/rust/zerocopy)
warning: unused import: `c_int`
--> src/zc.rs:1:12
|
1 | use libc::{c_int, splice};
| ^^^^^
|
= note: #[warn(unused_imports)] on by default
warning: unused import: `std::io::prelude::*;`
--> src/main.rs:4:5
|
4 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
warning: unused `std::result::Result` which must be used
--> src/main.rs:9:14
|
9 | unsafe { file.copy_to_fd(&mut file_write); }
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(unused_must_use)] on by default
Finished dev [unoptimized + debuginfo] target(s) in 0.50 secs
Running `target/debug/zerocopy`
kamal@elitebook  ~/r/zerocopy   master ± cat /tmp/foo.txt
kamal@elitebook  ~/r/zerocopy   master ± strace target/debug/zerocopy
execve("target/debug/zerocopy", ["target/debug/zerocopy"], [/* 80 vars */]) = 0
brk(NULL) = 0x5622fbef0000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
mmap(NULL, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff230e1c000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=133480, ...}) = 0
mmap(NULL, 133480, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7ff230dfb000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\200\r\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=14608, ...}) = 0
mmap(NULL, 2109680, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7ff2309f6000
mprotect(0x7ff2309f9000, 2093056, PROT_NONE) = 0
mmap(0x7ff230bf8000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7ff230bf8000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/librt.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340 \0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=31712, ...}) = 0
mmap(NULL, 2128832, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7ff2307ee000
mprotect(0x7ff2307f5000, 2093056, PROT_NONE) = 0
mmap(0x7ff2309f4000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6000) = 0x7ff2309f4000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\240`\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=142400, ...}) = 0
mmap(NULL, 2217000, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7ff2305d0000
mprotect(0x7ff2305e8000, 2097152, PROT_NONE) = 0
mmap(0x7ff2307e8000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x18000) = 0x7ff2307e8000
mmap(0x7ff2307ea000, 13352, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7ff2307ea000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/libgcc_s.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\220*\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=92584, ...}) = 0
mmap(NULL, 2188336, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7ff2303b9000
mprotect(0x7ff2303cf000, 2093056, PROT_NONE) = 0
mmap(0x7ff2305ce000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x15000) = 0x7ff2305ce000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20\5\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1856752, ...}) = 0
mmap(NULL, 3959200, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7ff22fff2000
mprotect(0x7ff2301b0000, 2093056, PROT_NONE) = 0
mmap(0x7ff2303af000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1bd000) = 0x7ff2303af000
mmap(0x7ff2303b5000, 14752, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7ff2303b5000
close(3) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff230df9000
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff230df7000
arch_prctl(ARCH_SET_FS, 0x7ff230dfa680) = 0
mprotect(0x7ff2303af000, 16384, PROT_READ) = 0
mprotect(0x7ff2305ce000, 4096, PROT_READ) = 0
mprotect(0x7ff2307e8000, 4096, PROT_READ) = 0
mprotect(0x7ff2309f4000, 4096, PROT_READ) = 0
mprotect(0x7ff230bf8000, 4096, PROT_READ) = 0
mprotect(0x5622faf91000, 16384, PROT_READ) = 0
mprotect(0x7ff230e1f000, 4096, PROT_READ) = 0
munmap(0x7ff230dfb000, 133480) = 0
set_tid_address(0x7ff230dfa950) = 6072
set_robust_list(0x7ff230dfa960, 24) = 0
rt_sigaction(SIGRTMIN, {0x7ff2305d5b40, [], SA_RESTORER|SA_SIGINFO, 0x7ff2305e1670}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {0x7ff2305d5bd0, [], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x7ff2305e1670}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/etc/malloc.conf", 0x7fff72da5010, 4096) = -1 ENOENT (No such file or directory)
brk(NULL) = 0x5622fbef0000
mmap(NULL, 2097152, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff22fdf2000
munmap(0x7ff22fdf2000, 2097152) = 0
mmap(NULL, 4190208, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff22fbf3000
munmap(0x7ff22fbf3000, 53248) = 0
munmap(0x7ff22fe00000, 2039808) = 0
open("/sys/devices/system/cpu/online", O_RDONLY|O_CLOEXEC) = 3
read(3, "0-3\n", 8192) = 4
close(3) = 0
rt_sigaction(SIGPIPE, {SIG_IGN, [PIPE], SA_RESTORER|SA_RESTART, 0x7ff2300277f0}, {SIG_DFL, [], 0}, 8) = 0
mmap(NULL, 2097152, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff22fa00000
open("/proc/self/maps", O_RDONLY|O_CLOEXEC) = 3
getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
read(3, "5622fad3d000-5622fad92000 r-xp 0"..., 1024) = 1024
read(3, "000 ---p 00016000 08:07 921543 "..., 1024) = 1024
read(3, ".so\n7ff2309f4000-7ff2309f5000 r-"..., 1024) = 1024
read(3, " /lib/x86_64-lin"..., 1024) = 424
close(3) = 0
sched_getaffinity(6072, 32, [0 1 2 3]) = 8
rt_sigaction(SIGSEGV, {0x5622fad4e720, [], SA_RESTORER|SA_STACK|SA_SIGINFO, 0x7ff2305e1670}, NULL, 8) = 0
rt_sigaction(SIGBUS, {0x5622fad4e720, [], SA_RESTORER|SA_STACK|SA_SIGINFO, 0x7ff2305e1670}, NULL, 8) = 0
sigaltstack(NULL, {ss_sp=NULL, ss_flags=SS_DISABLE, ss_size=0}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff230e1a000
sigaltstack({ss_sp=0x7ff230e1a000, ss_flags=0, ss_size=8192}, NULL) = 0
open("/tmp/foo", O_RDONLY|O_CLOEXEC) = 3
ioctl(3, FIOCLEX) = 0
open("/tmp/foo.txt", O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC, 0666) = 4
ioctl(4, FIOCLEX) = 0
splice(3, NULL, 4, NULL, 1024, 0) = -1 EINVAL (Invalid argument)
close(4) = 0
close(3) = 0
sigaltstack({ss_sp=NULL, ss_flags=SS_DISABLE, ss_size=8192}, NULL) = 0
munmap(0x7ff230e1a000, 8192) = 0
exit_group(0) = ?
+++ exited with 0 +++
kamal@elitebook  ~/r/zerocopy   master ± rm /tmp/foo.txt
kamal@elitebook  ~/r/zerocopy   master ± cat /tmp/foo
hi
kamal@elitebook  ~/r/zerocopy   master ± strace target/debug/zerocopy
✘ kamal@elitebook  ~/r/zerocopy   master ± cargo build
Finished dev [unoptimized + debuginfo] target(s) in 0.0 secs
kamal@elitebook  ~/r/zerocopy   master ± cat /tmp/foo
hi
kamal@elitebook  ~/r/zerocopy   master ± strace target/debug/zerocopy
execve("target/debug/zerocopy", ["target/debug/zerocopy"], [/* 80 vars */]) = 0
brk(NULL) = 0x561e4492f000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
mmap(NULL, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f15b978e000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=133480, ...}) = 0
mmap(NULL, 133480, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f15b976d000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\200\r\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=14608, ...}) = 0
mmap(NULL, 2109680, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f15b9368000
mprotect(0x7f15b936b000, 2093056, PROT_NONE) = 0
mmap(0x7f15b956a000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7f15b956a000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/librt.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340 \0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=31712, ...}) = 0
mmap(NULL, 2128832, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f15b9160000
mprotect(0x7f15b9167000, 2093056, PROT_NONE) = 0
mmap(0x7f15b9366000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6000) = 0x7f15b9366000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\240`\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=142400, ...}) = 0
mmap(NULL, 2217000, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f15b8f42000
mprotect(0x7f15b8f5a000, 2097152, PROT_NONE) = 0
mmap(0x7f15b915a000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x18000) = 0x7f15b915a000
mmap(0x7f15b915c000, 13352, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f15b915c000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/libgcc_s.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\220*\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=92584, ...}) = 0
mmap(NULL, 2188336, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f15b8d2b000
mprotect(0x7f15b8d41000, 2093056, PROT_NONE) = 0
mmap(0x7f15b8f40000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x15000) = 0x7f15b8f40000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20\5\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1856752, ...}) = 0
mmap(NULL, 3959200, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f15b8964000
mprotect(0x7f15b8b22000, 2093056, PROT_NONE) = 0
mmap(0x7f15b8d21000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1bd000) = 0x7f15b8d21000
mmap(0x7f15b8d27000, 14752, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f15b8d27000
close(3) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f15b976b000
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f15b9769000
arch_prctl(ARCH_SET_FS, 0x7f15b976c680) = 0
mprotect(0x7f15b8d21000, 16384, PROT_READ) = 0
mprotect(0x7f15b8f40000, 4096, PROT_READ) = 0
mprotect(0x7f15b915a000, 4096, PROT_READ) = 0
mprotect(0x7f15b9366000, 4096, PROT_READ) = 0
mprotect(0x7f15b956a000, 4096, PROT_READ) = 0
mprotect(0x561e44187000, 16384, PROT_READ) = 0
mprotect(0x7f15b9791000, 4096, PROT_READ) = 0
munmap(0x7f15b976d000, 133480) = 0
set_tid_address(0x7f15b976c950) = 6352
set_robust_list(0x7f15b976c960, 24) = 0
rt_sigaction(SIGRTMIN, {0x7f15b8f47b40, [], SA_RESTORER|SA_SIGINFO, 0x7f15b8f53670}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {0x7f15b8f47bd0, [], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x7f15b8f53670}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/etc/malloc.conf", 0x7ffcdea84ee0, 4096) = -1 ENOENT (No such file or directory)
brk(NULL) = 0x561e4492f000
mmap(NULL, 2097152, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f15b8764000
munmap(0x7f15b8764000, 2097152) = 0
mmap(NULL, 4190208, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f15b8565000
munmap(0x7f15b8565000, 634880) = 0
munmap(0x7f15b8800000, 1458176) = 0
open("/sys/devices/system/cpu/online", O_RDONLY|O_CLOEXEC) = 3
read(3, "0-3\n", 8192) = 4
close(3) = 0
rt_sigaction(SIGPIPE, {SIG_IGN, [PIPE], SA_RESTORER|SA_RESTART, 0x7f15b89997f0}, {SIG_DFL, [], 0}, 8) = 0
mmap(NULL, 2097152, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f15b8400000
open("/proc/self/maps", O_RDONLY|O_CLOEXEC) = 3
getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
read(3, "561e43f33000-561e43f88000 r-xp 0"..., 1024) = 1024
read(3, "000 ---p 00016000 08:07 921543 "..., 1024) = 1024
read(3, ".so\n7f15b9366000-7f15b9367000 r-"..., 1024) = 1024
read(3, " /lib/x86_64-lin"..., 1024) = 424
✘ kamal@elitebook  ~/r/zerocopy   master ± cargo run
Compiling zerocopy v0.1.0 (file:///home/kamal/rust/zerocopy)
warning: unused import: `c_int`
--> src/zc.rs:1:12
|
1 | use libc::{c_int, splice};
| ^^^^^
|
kamal@elitebook  ~/r/zerocopy   master ± cargo run
Compiling zerocopy v0.1.0 (file:///home/kamal/rust/zerocopy)
warning: unused import: `splice`
--> src/zc.rs:1:19
|
1 | use libc::{c_int, splice};
| ^^^^^^
|
= note: #[warn(unused_imports)] on by default
kamal@elitebook  ~/r/zerocopy   master ± cargo bench
Compiling zerocopy v0.1.0 (file:///home/kamal/rust/zerocopy)
warning: unused import: `splice`
--> src/zc.rs:1:19
|
1 | use libc::{c_int, splice};
| ^^^^^^
|
= note: #[warn(unused_imports)] on by default
warning: unused import: `std::io::prelude::*;`
--> src/zc.rs:4:5
|
4 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
warning: constant `__NR_copy_file_range` should have an upper case name such as `__NR_COPY_FILE_RANGE`
--> src/zc.rs:5:1
|
5 | const __NR_copy_file_range: ::libc::c_long = 326;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(non_upper_case_globals)] on by default
warning: unused import: `splice`
--> src/zc.rs:1:19
|
1 | use libc::{c_int, splice};
| ^^^^^^
|
= note: #[warn(unused_imports)] on by default
warning: unused import: `std::io::prelude::*;`
--> src/zc.rs:4:5
|
4 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
warning: constant `__NR_copy_file_range` should have an upper case name such as `__NR_COPY_FILE_RANGE`
--> src/zc.rs:5:1
|
5 | const __NR_copy_file_range: ::libc::c_long = 326;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(non_upper_case_globals)] on by default
warning: unused import: `splice`
--> src/zc.rs:1:19
|
1 | use libc::{c_int, splice};
| ^^^^^^
|
= note: #[warn(unused_imports)] on by default
warning: unused import: `std::io::prelude::*;`
--> src/zc.rs:4:5
|
4 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
warning: constant `__NR_copy_file_range` should have an upper case name such as `__NR_COPY_FILE_RANGE`
--> src/zc.rs:5:1
|
5 | const __NR_copy_file_range: ::libc::c_long = 326;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(non_upper_case_globals)] on by default
warning: unused import: `std::io::prelude::*;`
--> src/main.rs:4:5
|
4 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
warning: unused import: `splice`
--> src/zc.rs:1:19
|
1 | use libc::{c_int, splice};
| ^^^^^^
|
= note: #[warn(unused_imports)] on by default
warning: unused import: `std::io::prelude::*;`
--> src/zc.rs:4:5
|
4 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
warning: constant `__NR_copy_file_range` should have an upper case name such as `__NR_COPY_FILE_RANGE`
--> src/zc.rs:5:1
|
5 | const __NR_copy_file_range: ::libc::c_long = 326;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(non_upper_case_globals)] on by default
warning: unused import: `std::io::prelude::*;`
--> src/main.rs:4:5
|
4 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
warning: unused `std::result::Result` which must be used
--> src/main.rs:9:14
|
9 | unsafe { file.copy_to_fd(&mut file_write); }
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(unused_must_use)] on by default
warning: unused `std::result::Result` which must be used
--> src/main.rs:9:14
|
9 | unsafe { file.copy_to_fd(&mut file_write); }
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(unused_must_use)] on by default
warning: unused import: `zerocopy::zc::ZeroCopy`
--> benches/test.rs:4:5
|
4 | use zerocopy::zc::ZeroCopy;
| ^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(unused_imports)] on by default
Finished release [optimized] target(s) in 2.2 secs
Running target/release/deps/zerocopy-d1e6ccf182ed8071
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Running target/release/deps/zerocopy-d5c76dad325ec801
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Running target/release/deps/test-aa556ac073ca5de5
running 1 test
test benchmark ... bench: 0 ns/iter (+/- 0)
test result: ok. 0 passed; 0 failed; 0 ignored; 1 measured; 0 filtered out
kamal@elitebook  ~/r/zerocopy   master ± cargo bench
Finished release [optimized] target(s) in 0.0 secs
Running target/release/deps/zerocopy-d1e6ccf182ed8071
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Running target/release/deps/zerocopy-d5c76dad325ec801
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Running target/release/deps/test-aa556ac073ca5de5
running 1 test
test benchmark ... bench: 0 ns/iter (+/- 0)
test result: ok. 0 passed; 0 failed; 0 ignored; 1 measured; 0 filtered out
kamal@elitebook  ~/r/zerocopy   master ± cargo build
Compiling zerocopy v0.1.0 (file:///home/kamal/rust/zerocopy)
warning: unused import: `splice`
--> src/zc.rs:1:19
|
1 | use libc::{c_int, splice};
| ^^^^^^
|
= note: #[warn(unused_imports)] on by default
warning: unused import: `std::io::prelude::*;`
--> src/zc.rs:4:5
|
4 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
warning: constant `__NR_copy_file_range` should have an upper case name such as `__NR_COPY_FILE_RANGE`
--> src/zc.rs:5:1
|
5 | const __NR_copy_file_range: ::libc::c_long = 326;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(non_upper_case_globals)] on by default
warning: unused import: `splice`
--> src/zc.rs:1:19
|
1 | use libc::{c_int, splice};
| ^^^^^^
|
kamal@elitebook  ~/r/zerocopy   master ± ls
kamal@elitebook  ~/r/zerocopy   master ± cargo bench
Compiling zerocopy v0.1.0 (file:///home/kamal/rust/zerocopy)
warning: unused import: `std::io::prelude::*;`
--> benches/test.rs:6:5
|
6 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(unused_imports)] on by default
warning: function is never used: `default`
--> benches/test.rs:18:1
|
kamal@elitebook  ~/r/zerocopy   master ± cargo bench
Compiling zerocopy v0.1.0 (file:///home/kamal/rust/zerocopy)
warning: unused import: `std::io::prelude::*;`
--> benches/test.rs:6:5
|
6 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(unused_imports)] on by default
Finished release [optimized] target(s) in 0.88 secs
Running target/release/deps/zerocopy-d1e6ccf182ed8071
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Running target/release/deps/zerocopy-d5c76dad325ec801
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
kamal@elitebook  ~/r/zerocopy   master ± cargo bench
Compiling zerocopy v0.1.0 (file:///home/kamal/rust/zerocopy)
warning: unused import: `std::io::prelude::*;`
--> benches/test.rs:6:5
|
6 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(unused_imports)] on by default
warning: unused `std::result::Result` which must be used
--> benches/test.rs:15:5
|
15 | std::fs::remove_file("/tmp/foo.txt");
kamal@elitebook  ~/r/zerocopy   master ± cargo bench
Compiling zerocopy v0.1.0 (file:///home/kamal/rust/zerocopy)
warning: unused import: `splice`
--> src/zc.rs:1:19
|
1 | use libc::{c_int, splice};
| ^^^^^^
|
= note: #[warn(unused_imports)] on by default
warning: unused import: `std::io::prelude::*;`
--> src/zc.rs:4:5
|
4 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
warning: constant `__NR_copy_file_range` should have an upper case name such as `__NR_COPY_FILE_RANGE`
--> src/zc.rs:5:1
|
5 | const __NR_copy_file_range: ::libc::c_long = 326;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(non_upper_case_globals)] on by default
warning: unused import: `splice`
--> src/zc.rs:1:19
|
1 | use libc::{c_int, splice};
| ^^^^^^
|
= note: #[warn(unused_imports)] on by default
warning: unused import: `std::io::prelude::*;`
--> src/zc.rs:4:5
|
4 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
warning: constant `__NR_copy_file_range` should have an upper case name such as `__NR_COPY_FILE_RANGE`
--> src/zc.rs:5:1
|
5 | const __NR_copy_file_range: ::libc::c_long = 326;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(non_upper_case_globals)] on by default
warning: unused import: `splice`
--> src/zc.rs:1:19
|
1 | use libc::{c_int, splice};
| ^^^^^^
|
= note: #[warn(unused_imports)] on by default
warning: unused import: `std::io::prelude::*;`
--> src/zc.rs:4:5
|
4 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
warning: constant `__NR_copy_file_range` should have an upper case name such as `__NR_COPY_FILE_RANGE`
--> src/zc.rs:5:1
|
5 | const __NR_copy_file_range: ::libc::c_long = 326;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(non_upper_case_globals)] on by default
warning: unused import: `splice`
--> src/zc.rs:1:19
|
1 | use libc::{c_int, splice};
| ^^^^^^
|
= note: #[warn(unused_imports)] on by default
warning: unused import: `std::io::prelude::*;`
--> src/zc.rs:4:5
|
4 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
warning: constant `__NR_copy_file_range` should have an upper case name such as `__NR_COPY_FILE_RANGE`
--> src/zc.rs:5:1
|
5 | const __NR_copy_file_range: ::libc::c_long = 326;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(non_upper_case_globals)] on by default
warning: unused import: `std::io::prelude::*;`
--> benches/test.rs:6:5
|
6 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(unused_imports)] on by default
warning: unused `std::result::Result` which must be used
--> benches/test.rs:15:5
|
15 | std::fs::remove_file("/tmp/foo.txt");
kamal@elitebook  ~/r/zerocopy   master ± cargo bench
Compiling zerocopy v0.1.0 (file:///home/kamal/rust/zerocopy)
warning: unused import: `splice`
--> src/zc.rs:1:19
|
1 | use libc::{c_int, splice};
| ^^^^^^
|
= note: #[warn(unused_imports)] on by default
warning: unused import: `std::io::prelude::*;`
--> src/zc.rs:4:5
|
4 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
warning: constant `__NR_copy_file_range` should have an upper case name such as `__NR_COPY_FILE_RANGE`
--> src/zc.rs:5:1
|
5 | const __NR_copy_file_range: ::libc::c_long = 326;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(non_upper_case_globals)] on by default
warning: unused import: `splice`
--> src/zc.rs:1:19
|
1 | use libc::{c_int, splice};
| ^^^^^^
|
= note: #[warn(unused_imports)] on by default
warning: unused import: `std::io::prelude::*;`
--> src/zc.rs:4:5
|
4 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
warning: constant `__NR_copy_file_range` should have an upper case name such as `__NR_COPY_FILE_RANGE`
--> src/zc.rs:5:1
|
5 | const __NR_copy_file_range: ::libc::c_long = 326;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(non_upper_case_globals)] on by default
warning: unused import: `splice`
--> src/zc.rs:1:19
|
1 | use libc::{c_int, splice};
| ^^^^^^
|
= note: #[warn(unused_imports)] on by default
warning: unused import: `std::io::prelude::*;`
--> src/zc.rs:4:5
|
4 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
warning: constant `__NR_copy_file_range` should have an upper case name such as `__NR_COPY_FILE_RANGE`
--> src/zc.rs:5:1
|
5 | const __NR_copy_file_range: ::libc::c_long = 326;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(non_upper_case_globals)] on by default
warning: unused import: `splice`
--> src/zc.rs:1:19
|
1 | use libc::{c_int, splice};
| ^^^^^^
|
= note: #[warn(unused_imports)] on by default
warning: unused import: `std::io::prelude::*;`
--> src/zc.rs:4:5
|
4 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
warning: constant `__NR_copy_file_range` should have an upper case name such as `__NR_COPY_FILE_RANGE`
--> src/zc.rs:5:1
|
5 | const __NR_copy_file_range: ::libc::c_long = 326;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(non_upper_case_globals)] on by default
warning: unused import: `std::io::prelude::*;`
--> benches/test.rs:6:5
|
6 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(unused_imports)] on by default
warning: unused `std::result::Result` which must be used
--> benches/test.rs:15:5
|
15 | std::fs::remove_file("/tmp/foo.txt");
kamal@elitebook  ~/r/zerocopy   master ± cargo bench
Compiling zerocopy v0.1.0 (file:///home/kamal/rust/zerocopy)
warning: unused import: `splice`
--> src/zc.rs:1:19
|
1 | use libc::{c_int, splice};
| ^^^^^^
|
= note: #[warn(unused_imports)] on by default
warning: unused import: `std::io::prelude::*;`
--> src/zc.rs:4:5
|
4 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
warning: constant `__NR_copy_file_range` should have an upper case name such as `__NR_COPY_FILE_RANGE`
--> src/zc.rs:5:1
|
5 | const __NR_copy_file_range: ::libc::c_long = 326;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(non_upper_case_globals)] on by default
warning: unused import: `splice`
--> src/zc.rs:1:19
|
1 | use libc::{c_int, splice};
| ^^^^^^
|
= note: #[warn(unused_imports)] on by default
warning: unused import: `std::io::prelude::*;`
--> src/zc.rs:4:5
|
4 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
warning: constant `__NR_copy_file_range` should have an upper case name such as `__NR_COPY_FILE_RANGE`
--> src/zc.rs:5:1
|
5 | const __NR_copy_file_range: ::libc::c_long = 326;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(non_upper_case_globals)] on by default
warning: unused import: `splice`
--> src/zc.rs:1:19
|
1 | use libc::{c_int, splice};
| ^^^^^^
|
= note: #[warn(unused_imports)] on by default
warning: unused import: `std::io::prelude::*;`
--> src/zc.rs:4:5
|
4 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
warning: constant `__NR_copy_file_range` should have an upper case name such as `__NR_COPY_FILE_RANGE`
--> src/zc.rs:5:1
|
5 | const __NR_copy_file_range: ::libc::c_long = 326;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(non_upper_case_globals)] on by default
warning: unused import: `splice`
--> src/zc.rs:1:19
|
1 | use libc::{c_int, splice};
| ^^^^^^
|
= note: #[warn(unused_imports)] on by default
warning: unused import: `std::io::prelude::*;`
--> src/zc.rs:4:5
|
4 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
warning: constant `__NR_copy_file_range` should have an upper case name such as `__NR_COPY_FILE_RANGE`
--> src/zc.rs:5:1
|
5 | const __NR_copy_file_range: ::libc::c_long = 326;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(non_upper_case_globals)] on by default
warning: unused import: `std::io::prelude::*;`
--> benches/test.rs:6:5
|
6 | use std::io::prelude::*;
| ^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(unused_imports)] on by default
warning: unused `std::result::Result` which must be used
--> benches/test.rs:15:5
|
15 | std::fs::remove_file("/tmp/foo.txt");
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(unused_must_use)] on by default
kamal@elitebook  ~/r/zerocopy   master ± cargo bench
Finished release [optimized] target(s) in 0.0 secs
Running target/release/deps/zerocopy-d1e6ccf182ed8071
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Running target/release/deps/zerocopy-d5c76dad325ec801
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Running target/release/deps/test-aa556ac073ca5de5
running 2 tests
test default ... ^C
✘ kamal@elitebook  ~/r/zerocopy   master ± cargo bench
Finished release [optimized] target(s) in 0.0 secs
Running target/release/deps/zerocopy-d1e6ccf182ed8071
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Running target/release/deps/zerocopy-d5c76dad325ec801
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Running target/release/deps/test-aa556ac073ca5de5
running 2 tests
test default ... bench: 238 ns/iter (+/- 13)
test zerocopy ... bench: 2,290 ns/iter (+/- 1,896)
test result: ok. 0 passed; 0 failed; 0 ignored; 2 measured; 0 filtered out
kamal@elitebook  ~/r/zerocopy   master ±
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