[PATCH] selftests/powerpc: Relax L1d miss targets for rfi_flush test

[Joel Stanley]

On Tue, 23 Oct 2018 at 18:35, Naveen N. Rao
<naveen.n.rao at linux.vnet.ibm.com> wrote:
>
> When running the rfi_flush test, if the system is loaded, we see two
> issues:
> 1. The L1d misses when rfi_flush is disabled increase significantly due
> to other workloads interfering with the cache.
> 2. The L1d misses when rfi_flush is enabled sometimes goes slightly
> below the expected number of misses.
>
> To address these, let's relax the expected number of L1d misses:
> 1. When rfi_flush is disabled, we allow upto half the expected number of
> the misses for when rfi_flush is enabled.
> 2. When rfi_flush is enabled, we allow ~1% lower number of cache misses.
>
> Reported-by: Joel Stanley <joel at jms.id.au>
> Signed-off-by: Naveen N. Rao <naveen.n.rao at linux.vnet.ibm.com>

Thanks, this now passes 10/10 runs on my Romulus machine. A log is
attached below.

Tested-by: Joel Stanley <joel at jms.id.au>

Cheers,

Joel

---

for i in `seq 1 10`; do sudo ./rfi_flush; done
test: rfi_flush_test
tags: git_version:next-20181018-67-g61f7abf00719
PASS (L1D misses with rfi_flush=0: 5013939 < 95000000) [10/10 pass]
PASS (L1D misses with rfi_flush=1: 195054696 > 190000000) [10/10 pass]
success: rfi_flush_test
test: rfi_flush_test
tags: git_version:next-20181018-67-g61f7abf00719
PASS (L1D misses with rfi_flush=0: 11015957 < 95000000) [10/10 pass]
PASS (L1D misses with rfi_flush=1: 195053292 > 190000000) [10/10 pass]
success: rfi_flush_test
test: rfi_flush_test
tags: git_version:next-20181018-67-g61f7abf00719
PASS (L1D misses with rfi_flush=0: 8017248 < 95000000) [10/10 pass]
PASS (L1D misses with rfi_flush=1: 195145579 > 190000000) [10/10 pass]
success: rfi_flush_test
test: rfi_flush_test
tags: git_version:next-20181018-67-g61f7abf00719
PASS (L1D misses with rfi_flush=0: 11015308 < 95000000) [10/10 pass]
PASS (L1D misses with rfi_flush=1: 195042376 > 190000000) [10/10 pass]
success: rfi_flush_test
test: rfi_flush_test
tags: git_version:next-20181018-67-g61f7abf00719
PASS (L1D misses with rfi_flush=0: 1021356 < 95000000) [10/10 pass]
PASS (L1D misses with rfi_flush=1: 195031624 > 190000000) [10/10 pass]
success: rfi_flush_test
test: rfi_flush_test
tags: git_version:next-20181018-67-g61f7abf00719
PASS (L1D misses with rfi_flush=0: 6015342 < 95000000) [10/10 pass]
PASS (L1D misses with rfi_flush=1: 195037322 > 190000000) [10/10 pass]
success: rfi_flush_test
test: rfi_flush_test
tags: git_version:next-20181018-67-g61f7abf00719
PASS (L1D misses with rfi_flush=0: 16635 < 95000000) [10/10 pass]
PASS (L1D misses with rfi_flush=1: 195032476 > 190000000) [10/10 pass]
success: rfi_flush_test
test: rfi_flush_test
tags: git_version:next-20181018-67-g61f7abf00719
PASS (L1D misses with rfi_flush=0: 6013599 < 95000000) [10/10 pass]
PASS (L1D misses with rfi_flush=1: 195060037 > 190000000) [10/10 pass]
success: rfi_flush_test
test: rfi_flush_test
tags: git_version:next-20181018-67-g61f7abf00719
PASS (L1D misses with rfi_flush=0: 25236 < 95000000) [10/10 pass]
PASS (L1D misses with rfi_flush=1: 195052859 > 190000000) [10/10 pass]
success: rfi_flush_test
test: rfi_flush_test
tags: git_version:next-20181018-67-g61f7abf00719
PASS (L1D misses with rfi_flush=0: 18120 < 95000000) [10/10 pass]
PASS (L1D misses with rfi_flush=1: 195014212 > 190000000) [10/10 pass]
success: rfi_flush_test