| Message ID | 20241030-arm64-fp-stress-interval-v2-0-bd3cef48c22c@kernel.org (mailing list archive) |
|---|---|
| Headers | show |
| Series | kselftest/arm64: fp-stress signal delivery interval improvements | expand |
On Wed, Oct 30, 2024 at 12:02:01AM +0000, Mark Brown wrote: > One of the things that fp-stress does to stress the floating point > context switching is send signals to the test threads it spawns. > Currently we do this once per second but as suggested by Mark Rutland if > we increase this we can improve the chances of triggering any issues > with context switching the signal handling code. Do a quick change to > increase the rate of signal delivery, trying to avoid excessive impact > on emulated platforms, and a further change to mitigate the impact that > this creates during startup. > > Signed-off-by: Mark Brown <broonie@kernel.org> > --- > Changes in v2: > - Minor clarifications in commit message and log output. > - Link to v1: https://lore.kernel.org/r/20241029-arm64-fp-stress-interval-v1-0-db540abf6dd5@kernel.org > > --- > Mark Brown (2): > kselftest/arm64: Increase frequency of signal delivery in fp-stress > kselftest/arm64: Poll less often while waiting for fp-stress children With these changes, I was easily able to reproduce the SVCR=0 bug so: Acked-by: Will Deacon <will@kernel.org> for both. Will
On Wed, 30 Oct 2024 00:02:01 +0000, Mark Brown wrote: > One of the things that fp-stress does to stress the floating point > context switching is send signals to the test threads it spawns. > Currently we do this once per second but as suggested by Mark Rutland if > we increase this we can improve the chances of triggering any issues > with context switching the signal handling code. Do a quick change to > increase the rate of signal delivery, trying to avoid excessive impact > on emulated platforms, and a further change to mitigate the impact that > this creates during startup. > > [...] Applied to arm64 (for-next/kselftest), thanks! [1/2] kselftest/arm64: Increase frequency of signal delivery in fp-stress https://git.kernel.org/arm64/c/a3590d71a1ac [2/2] kselftest/arm64: Poll less often while waiting for fp-stress children https://git.kernel.org/arm64/c/161e9925053c
One of the things that fp-stress does to stress the floating point context switching is send signals to the test threads it spawns. Currently we do this once per second but as suggested by Mark Rutland if we increase this we can improve the chances of triggering any issues with context switching the signal handling code. Do a quick change to increase the rate of signal delivery, trying to avoid excessive impact on emulated platforms, and a further change to mitigate the impact that this creates during startup. Signed-off-by: Mark Brown <broonie@kernel.org> --- Changes in v2: - Minor clarifications in commit message and log output. - Link to v1: https://lore.kernel.org/r/20241029-arm64-fp-stress-interval-v1-0-db540abf6dd5@kernel.org --- Mark Brown (2): kselftest/arm64: Increase frequency of signal delivery in fp-stress kselftest/arm64: Poll less often while waiting for fp-stress children tools/testing/selftests/arm64/fp/fp-stress.c | 28 +++++++++++++++++----------- 1 file changed, 17 insertions(+), 11 deletions(-) --- base-commit: 8e929cb546ee42c9a61d24fae60605e9e3192354 change-id: 20241028-arm64-fp-stress-interval-8f5e62c06e12 Best regards,