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https://github.com/hanzoai/visor.git
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Andrei VaginandgVisor bot
bb7c86cc94
The vDSO calls are much faster. For exeample, here are results of read_benchmark_test_tmpfs_kvm before and after this change: Before: BM_Read/65536/real_time 7309 ns 7260 ns 82640 bytes_per_second=8.35016G/s After: BM_Read/65536/real_time 2065 ns 2080 ns 346151 bytes_per_second=29.558G/s PiperOrigin-RevId: 409547486
49 lines
1.4 KiB
Go
49 lines
1.4 KiB
Go
// Copyright 2021 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package time
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import (
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"syscall"
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"testing"
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"unsafe"
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"golang.org/x/sys/unix"
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"gvisor.dev/gvisor/pkg/abi/linux"
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)
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func TestClockGetTime(t *testing.T) {
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ts := unix.Timespec{}
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if ret := vdsoClockGettime(linux.CLOCK_MONOTONIC, &ts); ret != 0 {
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t.Fatalf("Unexpected error code: %v", ret)
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}
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sts := unix.Timespec{}
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if _, _, errno := unix.RawSyscall(unix.SYS_CLOCK_GETTIME,
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uintptr(linux.CLOCK_MONOTONIC),
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uintptr(unsafe.Pointer(&sts)), 0); errno != 0 {
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t.Fatalf("Unexpected error code: %v", errno)
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}
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// Check that ts.Sec is in [sts.Sec, sts.Sec + 5].
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if sts.Sec < ts.Sec || sts.Sec > ts.Sec+5 {
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t.Fatalf("Unexpected delta: vdso %+v syscall %+v", ts, sts)
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}
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}
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func TestClockGetTimeEINVAL(t *testing.T) {
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ts := unix.Timespec{}
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if ret := vdsoClockGettime(-1, &ts); ret != -int(syscall.EINVAL) {
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t.Fatalf("Unexpected error code: %v", ret)
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}
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}
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