Arvados

Ready for review at 9ffdf93f954bfe7bfe2269d361961d653caea146 on branch 18805-easy-static-compilation

developer-run-tests: #2933

This makes

cd cmd/arvados-server
CGO_ENABLED=0 GOOS=linux go build -ldflags='-s -w -extldflags=-static' -tags static

work without issues.

LGTM.

For posterity, we determined C.sysconf(C._SC_CLK_TCK) always returns 100. The reason USER_HZ exists in the first place is to scale measurements based on the kernel-configurable HZ value to the units expected by lots of existing userland code that assumed HZ was always 100. IOW, USER_HZ is non-configurable constant by design. It is 100 on all platforms except alpha and ia64, i.e., on all platforms that have Go runtimes. Another data point: there's a Go sysconf library (https://github.com/tklauser/go-sysconf) whose _SC_CLK_TCK func just returns 100 instead of doing a syscall.