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Question about running RISC-V program on Gem5

zahra butool

Thu, Feb 1, 2024 9:51 PM

Hi everyone,

Can this program be run on Gem5 in SE mode? Or since it is built with
RISC-V Linux toolchain, do I need to run it in FS mode?
If I need to run this program in FS mode, how can I get the stat for
this specific program and not Linux+this program?

Hi everyone, I want to run a program built with RISC-V Linux toolchain (riscv64-unknown-linux-gnu-g++) on Gem5 and get its cycle count and other stats. I have two questions regarding this and would be thankful if you could help with them. 1. Can this program be run on Gem5 in SE mode? Or since it is built with RISC-V Linux toolchain, do I need to run it in FS mode? 2. If I need to run this program in FS mode, how can I get the stat for this specific program and not Linux+this program?

sun2k23

Fri, Feb 2, 2024 1:37 AM

Hi,

I think you can try to use starttimeofday() function both in SE and FS mode. Inside SE mode, it will trigger syscall/ecall.
Demo code like below for your reference:

S2K23

At 2024-02-02 05:51:46, "zahra butool via gem5-users" gem5-users@gem5.org wrote:

Hi everyone,

I want to run a program built with RISC-V Linux toolchain (riscv64-unknown-linux-gnu-g++) on Gem5 and get its cycle count and other stats.
I have two questions regarding this and would be thankful if you could help with them.
Can this program be run on Gem5 in SE mode? Or since it is built with RISC-V Linux toolchain, do I need to run it in FS mode?
If I need to run this program in FS mode, how can I get the stat for this specific program and not Linux+this program?

Hi, I think you can try to use starttimeofday() function both in SE and FS mode. Inside SE mode, it will trigger syscall/ecall. Demo code like below for your reference: S2K23 At 2024-02-02 05:51:46, "zahra butool via gem5-users" <gem5-users@gem5.org> wrote: Hi everyone, I want to run a program built with RISC-V Linux toolchain (riscv64-unknown-linux-gnu-g++) on Gem5 and get its cycle count and other stats. I have two questions regarding this and would be thankful if you could help with them. Can this program be run on Gem5 in SE mode? Or since it is built with RISC-V Linux toolchain, do I need to run it in FS mode? If I need to run this program in FS mode, how can I get the stat for this specific program and not Linux+this program?