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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/98678] New: 30_threads/future/members/poll.cc
 execution test FAILs
Date: Thu, 14 Jan 2021 12:16:56 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98678

            Bug ID: 98678
           Summary: 30_threads/future/members/poll.cc execution test FAILs
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ro at gcc dot gnu.org
  Target Milestone: ---
            Target: i386-pc-solaris2.11, x86_64-pc-solaris2.11,
                    arm-none-linux-gnueabi, hppa-unknown-linux-gnu,
                    x86_64-pc-linux-gnu

The 30_threads/future/members/poll.cc reliably FAILs on 32 and 64-bit
Solaris/x86:

/vol/gcc/src/hg/master/local/libstdc++-v3/testsuite/30_threads/future/membe=
rs/poll.cc:95:
int main(): Assertion 'wait_until_sys_min < (ready * 100)' failed.
wait_for(0s): 11892ns for 200 calls, avg 59.46ns per call
wait_until(system_clock minimum): 1304458ns for 200 calls, avg 6522.29ns per
call
wait_until(steady_clock minimum): 1403221ns for 200 calls, avg 7016.1ns per
call
wait_until(system_clock epoch): 3343806ns for 200 calls, avg 16719ns per ca=
ll
wait_until(steady_clock epoch: 2959581ns for 200 calls, avg 14797.9ns per c=
all
wait_for when ready: 10969ns for 200 calls, avg 54.845ns per call

While I don't see the failure on Solaris/SPARC, there are reports for a cou=
ple
of other targets on gcc-testresults.  However, the Linux/x86_64 ones seem to
only affect the gcc-10 branch.=