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From: "kip at thevertigo dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/97329] POWER9 default cache and line sizes appear to be
 wrong
Date: Thu, 08 Oct 2020 05:31:54 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97329

Kip Warner <kip at thevertigo dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|10.2.0                      |11.0

--- Comment #1 from Kip Warner <kip at thevertigo dot com> ---
Just tested with Git head (11.0.0 20201008) and same issue:

$ gcc --version
gcc (GCC) 11.0.0 20201008 (experimental)
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ gcc -Q -mcpu=3Dpower9 --help=3Dparam | grep -i cache
  --param=3Dl1-cache-line-size=3D           128
  --param=3Dl1-cache-size=3D                32
  --param=3Dl2-cache-size=3D                512

$ getconf -a | grep CACHE
LEVEL1_ICACHE_SIZE                 32768
LEVEL1_ICACHE_ASSOC                32
LEVEL1_ICACHE_LINESIZE             128
LEVEL1_DCACHE_SIZE                 32768
LEVEL1_DCACHE_ASSOC                32
LEVEL1_DCACHE_LINESIZE             128
LEVEL2_CACHE_SIZE                  524288
LEVEL2_CACHE_ASSOC                 2048
LEVEL2_CACHE_LINESIZE              32
LEVEL3_CACHE_SIZE                  10485760
LEVEL3_CACHE_ASSOC                 40960
LEVEL3_CACHE_LINESIZE              32
LEVEL4_CACHE_SIZE                  0
LEVEL4_CACHE_ASSOC                 0
LEVEL4_CACHE_LINESIZE              0

$ cat /proc/cpuinfo
processor       : 0
cpu             : POWER9, altivec supported
clock           : 2933.000000MHz
revision        : 2.2 (pvr 004e 1202)

(...)

processor       : 143
cpu             : POWER9, altivec supported
clock           : 2166.000000MHz
revision        : 2.2 (pvr 004e 1202)

timebase        : 512000000
platform        : PowerNV
model           : 0000000000000000
machine         : PowerNV 0000000000000000
firmware        : OPAL
MMU             : Radix=