test: store persistence files in RAM
On VM-based builders, the nvmem unittest was sometimes missing the
10-second deadline, likely being stuck in slow I/Os.
Try to move the persistent storage files used for flash 'emulation' on
host from the build directory to a RAM-backed filesystem in /dev/shm
in order to mitigate this bottleneck.
Store the new backing files in a path like:
/dev/shm/EC_persist__mnt_host_source_src_platform_ec_build_host_nvmem_nvmem.exe_flash
in order to keep the properties of the old system:
subsequent runs of the same build will use the same persistent storage
but 2 different trees won't mix up.
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
BRANCH=none
BUG=chromium:715011
TEST=make runtests
TEST=run the following command with and without this change:
'for i in 0 1 2 3 4 5 6 7 8 9 ; do time make run-nvmem ; done'
and see the average test time around 500 ms without the change
and around 320 ms with it on an idle and beefy workstation.
Change-Id: Ic2ff6511b81869171efc484ca805f8c0d6008595
Reviewed-on: https://chromium-review.googlesource.com/893380
Commit-Ready: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
(cherry picked from commit 924d21d904b9f2c640ee5b0ccabcf78200456a0f)
Reviewed-on: https://chromium-review.googlesource.com/928121
Commit-Queue: Vincent Palatin <vpalatin@chromium.org>
Trybot-Ready: Vincent Palatin <vpalatin@chromium.org>
1 file changed
