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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/110973] 9% 444.namd regression between
 g:c2a447d840476dbd (2023-08-03 18:47) and g:73da34a538ddc2ad (2023-08-09
 20:17)
Date: Fri, 11 Aug 2023 13:56:15 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110973

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2023-08-11
     Ever confirmed|0                           |1

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
For generic the biggest difference is in calc_pair_energy_fullelect:

Samples: 1M of event 'cycles', Event count (approx.): 2222678752091=20=20=
=20=20=20=20=20=20=20=20=20=20=20
Overhead       Samples  Command          Shared Object             Symbol=
=20=20=20=20=20=20=20
   6.68%        132170  namd_peak.amd64  namd_peak.amd64-m64-mine  [.]
ComputeNonbondedUtil::calc_pair_energy_fullelect                         #
   6.16%        121796  namd_base.amd64  namd_base.amd64-m64-mine  [.]
ComputeNonbondedUtil::calc_pair_fullelect                                #
   6.16%        121875  namd_peak.amd64  namd_peak.amd64-m64-mine  [.]
ComputeNonbondedUtil::calc_pair_fullelect                                #
   5.98%        118457  namd_base.amd64  namd_base.amd64-m64-mine  [.]
ComputeNonbondedUtil::calc_pair_energy_fullelect                         #
   5.33%        105302  namd_peak.amd64  namd_peak.amd64-m64-mine  [.]
ComputeNonbondedUtil::calc_pair                                          #
   5.19%        102880  namd_peak.amd64  namd_peak.amd64-m64-mine  [.]
ComputeNonbondedUtil::calc_pair_energy                                   #
   5.15%        101892  namd_base.amd64  namd_base.amd64-m64-mine  [.]
ComputeNonbondedUtil::calc_pair_energy_merge_fullelect                   #
   5.15%        102119  namd_peak.amd64  namd_peak.amd64-m64-mine  [.]
ComputeNonbondedUtil::calc_pair_energy_merge_fullelect                   #
   5.02%         99415  namd_base.amd64  namd_base.amd64-m64-mine  [.]
ComputeNonbondedUtil::calc_pair_energy                                   #
   5.00%         98964  namd_peak.amd64  namd_peak.amd64-m64-mine  [.]
ComputeNonbondedUtil::calc_pair_merge_fullelect                          #
   4.98%         98257  namd_base.amd64  namd_base.amd64-m64-mine  [.]
ComputeNonbondedUtil::calc_pair                                          #
   4.90%         96943  namd_base.amd64  namd_base.amd64-m64-mine  [.]
ComputeNonbondedUtil::calc_pair_merge_fullelect

it's again very difficult to pin-point an offender :/=