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PPC/AIX: [heap] Uncommit unused large object page memory.

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Port d61a5c376b

Original commit message:

    As a first step I uncommit the memory on the main thread. Also
    to measure impact and stability of that optimization. In a
    follow-up CL, the uncommitting should be moved on the concurrent thread.

R=jochen@chromium.org, hpayer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2041233003
Cr-Commit-Position: refs/heads/master@{#37332}
This commit is contained in:
bjaideep 2016-06-28 06:28:23 -07:00 committed by Commit bot
parent 994dc21148
commit 04b655c6e9
1 changed files with 5 additions and 0 deletions
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5
src/base/platform/platform-aix.cc
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@ -232,6 +232,11 @@ bool VirtualMemory::UncommitRegion(void* base, size_t size) {
return mprotect(base, size, PROT_NONE) != -1;
}
bool VirtualMemory::ReleasePartialRegion(void* base, size_t size,
void* free_start, size_t free_size) {
return munmap(free_start, free_size) == 0;
}
bool VirtualMemory::ReleaseRegion(void* base, size_t size) {
return munmap(base, size) == 0;