RFR(S): 8159818: Convert IHOP_test to GTest

[Thomas Schatzl]

Hi Kirill,

On Thu, 2016-09-22 at 22:38 +0300, Kirill Zhaldybin wrote:
> Dear all,
> 
> Could you please review this fix for 8159818?
> 
> Two tests were converted to GTest.
> Since these tests require G1 GC, checks were added to prevent them to
> be 
> run with other GCs.
> Comments "// @requires UseG1GC" were added to facilitate finding such
> tests.
> 
> WebRev: http://cr.openjdk.java.net/~kzhaldyb/webrevs/JDK-8159818/webr
> ev.00/
> CR: https://bugs.openjdk.java.net/browse/JDK-8159818

  - g1IHOPControl.hpp needs copyright update

test_g1IHOPControl.cpp:

-   30 static void test_update(G1IHOPControl* ctrl, double alloc_time,
    31         size_t alloc_amount, size_t young_size, double
mark_time) {

please follow usual hotspot style guidelines for formatting parameter
lists.

-   40   // Test could be only run with G1
    75   // Test could be only run with G1

-> "Test requires G1."

-   95   const size_t settled_ihop1 = target_size
  96           - (young_size + alloc_amount1 / alloc_time1 *
marking_time1);

when breaking lines (the whole file seems to have a strict ~80 chars
line limit, which we do not require), I prefer to have the next line
not begin with an operator (others may disagree, so ignore this if
wanted).
Anyway I think there is no need to limit the line lengths to 80 chars.

Looks good otherwise.

Thanks
  Thomas