[pmg-devel] [PATCH v2 pmg-log-tracker] rewrite in rust

[Thomas Lamprecht]

On 11/8/19 11:17 AM, Mira Limbeck wrote:
> Memory usage was way too high (1.8G for the testcase, while the C log tracker used 150M).

RSS? or what memory property did you measure?

> 
> With the new changes it is now at ~190M and requires less time. Especially system time is now lower than the C version.

great!

> 
> Will send a v3 soon.
> 
> On 11/6/19 8:13 AM, Dietmar Maurer wrote:
>> memory usage would also be interesting ...
>>
>> Also, why is system time higher in rust??
>>
>>> On 5 November 2019 19:04 Thomas Lamprecht <t.lamprecht at proxmox.com> wrote:
>>>
>>>   On 11/5/19 4:58 PM, Mira Limbeck wrote:
>>>> Some simple benchmarks: (32 syslog files (syslog to syslog.31.gz))
>>>>
>>>> Rust: (median of 5 runs + 1 for cache)
>>>> sudo pmg-log-tracker -s "2018-01-01 00:00:00" -vv > /dev/null  11.68s user 0.74s system 99% cpu 12.421 total
>>>> sudo pmg-log-tracker -s "2018-01-01 00:00:00" -v > /dev/null  9.89s user 0.64s system 99% cpu 10.531 total
>>>>
>>>> C: (same as for the rust version)
>>>> sudo pmg-log-tracker -s "2018-01-01 00:00:00" -vv > /dev/null  11.83s user 0.32s system 99% cpu 12.147 total
>>>> sudo pmg-log-tracker -s "2018-01-01 00:00:00" -v > /dev/null  10.58s user 0.24s system 99% cpu 10.821 total
>>>>
>>> what about the benchmark environment? Where caches dropped in-between?
>>>
>>> Was a memory-backed tempfs for the backing "storage" tested also? To
>>> have a comparison which is for sure not IO limited?