TimeAdapter incompatible with macOS/BSD time

[krono]

The BSD and macOS time does not support the -f switch (as in https://github.com/smarr/ReBench/blob/master/rebench/interop/time_adapter.py#L46).

However I checket macOS, OpenBSD and FreeBSD and they support an -l switch such that that

-l the contents of the rusage structure are printed.

This looks as follows:

$ /usr/bin/time -l someCommand
[…output…]
        1.04 real         0.44 user         0.32 sys
  23814144  maximum resident set size
         0  average shared memory size
         0  average unshared data size
         0  average unshared stack size
     29843  page reclaims
      1216  page faults
         0  swaps
       294  block input operations
         3  block output operations
         0  messages sent
         0  messages received
        46  signals received
      1015  voluntary context switches
       645  involuntary context switches

[krono]

For #89

[smarr]

Did you see the code below? Specifically https://github.com/smarr/ReBench/blob/master/rebench/interop/time_adapter.py#L58?

[krono]

yes.

I just wanted to have it tracked, and (a) that it's the same with other BSDen as well as (b) there's more info available even without -f.

[smarr]

Ok, thanks. Don't think, I'll have time for it, so, will mark it for later.
The current solution is working on macOS as far as the tests tell me.

[krono]

Ack.

[lou1306]

Sorry for posting on a 6yo issue, but I wanted to point out a minor, related issue on arm64 machines.

There, installing the GNU time implementation (e.g., with brew install gnu-time) is not enough because ReBench only looks in /usr/bin/time and /opt/local/bin/gtime. Would it be possible to add /opt/homebrew/bin to the list of searched paths?

In the meantime, I think the easiest workaround is to just create a symlink:

mkdir -p /opt/local/bin
ln -s `which gtime` /opt/local/bin/gtime

[smarr]

@lou1306 I am very open to a PR that change this code here to iterate over a list of known binaries, to find the one that's available: https://github.com/smarr/ReBench/blob/master/rebench/interop/time_adapter.py#L65-L82