diff options
| -rw-r--r-- | test/README.md | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/test/README.md b/test/README.md index 581949a..72a4986 100644 --- a/test/README.md +++ b/test/README.md @@ -47,6 +47,22 @@ Virtual machine images are built during test executions using [mbuto](https://mbuto.lameexcu.se/), the shell script is sourced via _git_ as needed, so there's no need to actually install it. +### Kernel parameters + +Performance tests use iperf3 with rather large TCP receiving and sending +windows, to decrease the likelihood of iperf3 itself becoming the bottleneck. +These values need to be allowed by the kernel of the host running the tests. +Example for /etc/sysctl.conf: + + net.core.rmem_max = 134217728 + net.core.wmem_max = 134217728 + +Further, the passt demo uses perf(1), relying on hardware events for performance +counters, to display syscall overhead. The kernel needs to allow unprivileged +users to access these events. Suggested entry for /etc/sysctl.conf: + + kernel.perf_event_paranoid = -1 + ### Special requirements for continuous integration and demo modes Running the test suite as continuous integration or demo modes will record the |