On Mon, 8 May 2023 10:19:44 GMT, Fei Yang <fy...@openjdk.org> wrote: >> Could you provide the values for `reserved`, `ZAddressHeapBase`, and >> `ZAddressOffsetMax`, when this test is failing. I'd like to know if we can >> make a workaround for you, or if we have to turn off the test for riscv. > > @stefank : I ran this gtest for 5 times on linux-riscv64 board and here is > what I got. > > ZAddressHeapBase : 0x800000000 > ZAddressOffsetMax: 0x800000000 > ZGranuleSize : 0x200000 > > In os::pd_attempt_reserve_memory_at() which is called by > os::attempt_reserve_memory_at(), return value by anon_mmap() [1] is one of: > ```0x3f8d5ff000, 0x3f649fe000, 0x3f5d3ff000, 0x3f68077000 and 0x3f555ff000``` > > So seems that those values are not in the range [ZAddressHeapBase, > ZAddressHeapBase+ZAddressOffsetMax). > > [1] > https://github.com/openjdk/jdk/blob/master/src/hotspot/os/linux/os_linux.cpp#L3334
That's unfortunate. Could you try this patch, which probes the address range to see if it can reserve the memory somewhere else within `[ZAddressHeapBase, ZAddressHeapBase+ZAddressOffsetMax)`: https://github.com/stefank/jdk/tree/zgc_generational_review_test_zforwarding ------------- PR Review Comment: https://git.openjdk.org/jdk/pull/13771#discussion_r1187406599
