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author | Chuan Zheng <zhengchuan@huawei.com> | 2020-09-16 14:22:03 +0800 |
---|---|---|
committer | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2020-09-25 12:45:57 +0100 |
commit | f82583cdc05b89e5900e44ceacb6cc85f974b448 (patch) | |
tree | c50862024368f8f239e8c8f66cad9d85342be18b /migration/dirtyrate.c | |
parent | 9c04387b88a7685ab2b1f77911a56e91d8f67b6d (diff) | |
download | qemu-f82583cdc05b89e5900e44ceacb6cc85f974b448.zip qemu-f82583cdc05b89e5900e44ceacb6cc85f974b448.tar.gz qemu-f82583cdc05b89e5900e44ceacb6cc85f974b448.tar.bz2 |
migration/dirtyrate: skip sampling ramblock with size below MIN_RAMBLOCK_SIZE
In order to sample real RAM, skip ramblock with size below MIN_RAMBLOCK_SIZE
which is set as 128M.
Signed-off-by: Chuan Zheng <zhengchuan@huawei.com>
Reviewed-by: David Edmondson <david.edmondson@oracle.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
Message-Id: <1600237327-33618-9-git-send-email-zhengchuan@huawei.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Diffstat (limited to 'migration/dirtyrate.c')
-rw-r--r-- | migration/dirtyrate.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c index 0f78aa3..ee47e2b 100644 --- a/migration/dirtyrate.c +++ b/migration/dirtyrate.c @@ -138,6 +138,18 @@ static void get_ramblock_dirty_info(RAMBlock *block, strcpy(info->idstr, qemu_ram_get_idstr(block)); } +static bool skip_sample_ramblock(RAMBlock *block) +{ + /* + * Sample only blocks larger than MIN_RAMBLOCK_SIZE. + */ + if (qemu_ram_get_used_length(block) < (MIN_RAMBLOCK_SIZE << 10)) { + return true; + } + + return false; +} + static bool record_ramblock_hash_info(struct RamblockDirtyInfo **block_dinfo, struct DirtyRateConfig config, int *block_count) @@ -150,6 +162,9 @@ static bool record_ramblock_hash_info(struct RamblockDirtyInfo **block_dinfo, bool ret = false; RAMBLOCK_FOREACH_MIGRATABLE(block) { + if (skip_sample_ramblock(block)) { + continue; + } total_count++; } @@ -159,6 +174,9 @@ static bool record_ramblock_hash_info(struct RamblockDirtyInfo **block_dinfo, } RAMBLOCK_FOREACH_MIGRATABLE(block) { + if (skip_sample_ramblock(block)) { + continue; + } if (index >= total_count) { break; } @@ -225,6 +243,9 @@ static bool compare_page_hash_info(struct RamblockDirtyInfo *info, RAMBlock *block = NULL; RAMBLOCK_FOREACH_MIGRATABLE(block) { + if (skip_sample_ramblock(block)) { + continue; + } block_dinfo = find_block_matched(block, block_count, info); if (block_dinfo == NULL) { continue; |