1 // Copyright 2015 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package runtime 6 7 const ( 8 _AT_NULL = 0 9 _AT_RANDOM = 25 // introduced in 2.6.29 10 ) 11 12 var randomNumber uint32 13 14 //go:nosplit 15 func cputicks() int64 { 16 // Currently cputicks() is used in blocking profiler and to seed fastrand1(). 17 // nanotime() is a poor approximation of CPU ticks that is enough for the profiler. 18 // randomNumber provides better seeding of fastrand1. 19 return nanotime() + int64(randomNumber) 20 } 21
