Wow, sounds great! Really looking forward to this feature! 在 2021年4月28日 +0800 PM12:22，Ian Lance Taylor <i...@golang.org>，写道： > On Tue, Apr 27, 2021 at 8:26 PM Pure White <wu.purewh...@gmail.com> wrote: > > > > I think this is a good idea. But I suppose this will meet the same problem > > I have met ---- syscall package is outside of the runtime. > > We can introduce hooks into the runtime that are only for the standard > library, because we know exactly how they will be used. > > Ian > > > > > 在2021年4月28日星期三 UTC+8 上午12:54:25<Michael Pratt> 写道： > > > > > > I'm not sure if calling through the VDSO is the best solution to this > > > specific issue, though it does sound like a case that would certainly > > > benefit. > > > > > > Regardless, one fairly clean way we could support this would be to make > > > x/sys/unix.ClockGettime (and Gettimeofday) call through the VDSO rather > > > than performing the syscall. That is always a valid operation (the VDSO > > > will make the syscall if it doesn't support the specific options passed), > > > and I think would solve this problem without even changing the API. It > > > seems we don't do that already for simplicity of implementation and prior > > > lack of need. > > > > > > On Tue, Apr 27, 2021 at 12:13 PM Ian Lance Taylor <ia...@golang.org> > > > wrote: > > > > > > > > On Tue, Apr 27, 2021, 8:55 AM Manlio Perillo <manlio....@gmail.com> > > > > wrote: > > > > > > > > > > Il giorno martedì 27 aprile 2021 alle 17:51:46 UTC+2 Ian Lance Taylor > > > > > ha scritto: > > > > > > > > > > > > On Tue, Apr 27, 2021 at 7:43 AM Manlio Perillo > > > > > > <manlio....@gmail.com> wrote: > > > > > > > > > > > > > > Il giorno lunedì 26 aprile 2021 alle 10:24:09 UTC+2 Pure White ha > > > > > > > scritto: > > > > > > > > > > > > > > > > So I really want to know what is the right way to do vdso call > > > > > > > > outside runtime? > > > > > > > > > > > > > > > What about using a different function instead of time.Now, and > > > > > > > using RawSyscall? > > > > > > > > > > > > That wouldn't be a VDSO call. VDSO calls are in general faster than > > > > > > system calls. There is more background at > > > > > > https://man7.org/linux/man-pages/man7/vdso.7.html. > > > > > > > > > > > > Ian > > > > > > > > > > > > > > > Yes, that wouldn't a VDSO call. But since a VDSO call will require > > > > > cgo , maybe RawSyscall will be more efficient? > > > > > > > > > > > > The meaningful comparison is to time.Now, which uses VDSO. I suppose it > > > > is possible that RawSyscall of clock_gettime with a coarse clock would > > > > be faster than time.Now, but I would be surprised. > > > > > > > > Ian > > > > > > > > -- > > > > > > > > You received this message because you are subscribed to the Google > > > > Groups "golang-nuts" group. > > > > To unsubscribe from this group and stop receiving emails from it, send > > > > an email to golang-nuts...@googlegroups.com. > > > > > > > > To view this discussion on the web visit > > > > https://groups.google.com/d/msgid/golang-nuts/CAOyqgcX9mfSFq5gucrTCi0PJyVdLzA2xGXNByDeOGOyaFLo1hA%40mail.gmail.com. > > > > -- > > You received this message because you are subscribed to the Google Groups > > "golang-nuts" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to golang-nuts+unsubscr...@googlegroups.com. > > To view this discussion on the web visit > > https://groups.google.com/d/msgid/golang-nuts/a57afc3e-a91a-4564-b540-dce9ff0e2429n%40googlegroups.com.
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