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bdev/malloc: report accel sequence support

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This actually allows malloc bdev to chain multiple accel operations
together.  And, since the last operation will always be a copy, accel
should remove that copy by modifying previous operation's dst/src.

On my system, it improved bdevperf performance (single core, qd=4,
bs=128k, bdev_crypto on top of bdev_malloc, crypto_sw):

randread: 5668M/s -> 8201M/s
randwrite: 5148M/s -> 7856M/s

Signed-off-by: Konrad Sztyber <konrad.sztyber@intel.com>
Change-Id: I5b9173fa70a42ee56f56c496a34037d46d2f420f
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/17202
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Community-CI: Mellanox Build Bot
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
This commit is contained in:
Konrad Sztyber 2023-03-09 12:43:26 +01:00
parent 9276019077
commit 97ce07c261
2 changed files with 35 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
module/bdev/malloc/bdev_malloc.c
View File

@ -534,13 +534,32 @@ bdev_malloc_get_memory_domains(void *ctx, struct spdk_memory_domain **domains, i
return num_domains;
}
static bool
bdev_malloc_accel_sequence_supported(void *ctx, enum spdk_bdev_io_type type)
{
struct malloc_disk *malloc_disk = ctx;
if (malloc_disk->disk.dif_type != SPDK_DIF_DISABLE) {
return false;
}
switch (type) {
case SPDK_BDEV_IO_TYPE_READ:
case SPDK_BDEV_IO_TYPE_WRITE:
return true;
default:
return false;
}
}
static const struct spdk_bdev_fn_table malloc_fn_table = {
.destruct = bdev_malloc_destruct,
.submit_request = bdev_malloc_submit_request,
.io_type_supported = bdev_malloc_io_type_supported,
.get_io_channel = bdev_malloc_get_io_channel,
.write_config_json = bdev_malloc_write_json_config,
.get_memory_domains = bdev_malloc_get_memory_domains,
.destruct = bdev_malloc_destruct,
.submit_request = bdev_malloc_submit_request,
.io_type_supported = bdev_malloc_io_type_supported,
.get_io_channel = bdev_malloc_get_io_channel,
.write_config_json = bdev_malloc_write_json_config,
.get_memory_domains = bdev_malloc_get_memory_domains,
.accel_sequence_supported = bdev_malloc_accel_sequence_supported,
};
static int

19
test/bdev/chaining.sh
View File

@ -79,38 +79,39 @@ update_stats
# Write a single 64K request and check the stats
dd if=/dev/urandom of="$input" bs=1K count=64
spdk_dd --if "$input" --ob Nvme0n1 --bs $((64 * 1024)) --count 1
(($(get_stat sequence_executed) == stats[sequence_executed] + 2))
(($(get_stat sequence_executed) == stats[sequence_executed] + 1))
(($(get_stat executed encrypt) == stats[encrypt_executed] + 2))
(($(get_stat executed decrypt) == stats[decrypt_executed]))
# There's still one copy performed by the malloc bdev
(($(get_stat executed copy) == stats[copy_executed] + 1))
# No copies should be done - the copy from the malloc should translate to changing encrypt's
# destination buffer
(($(get_stat executed copy) == stats[copy_executed]))
update_stats
# Now read that 64K, verify the stats and check that it matches what was written
spdk_dd --of "$output" --ib Nvme0n1 --bs $((64 * 1024)) --count 1
(($(get_stat sequence_executed) == stats[sequence_executed] + 2))
(($(get_stat sequence_executed) == stats[sequence_executed] + 1))
(($(get_stat executed encrypt) == stats[encrypt_executed]))
(($(get_stat executed decrypt) == stats[decrypt_executed] + 2))
(($(get_stat executed copy) == stats[copy_executed] + 1))
(($(get_stat executed copy) == stats[copy_executed]))
cmp "$input" "$output"
spdk_dd --if /dev/zero --ob Nvme0n1 --bs $((64 * 1024)) --count 1
update_stats
# Now do the same using 4K requests
spdk_dd --if "$input" --ob Nvme0n1 --bs 4096 --count 16
(($(get_stat sequence_executed) == stats[sequence_executed] + 32))
(($(get_stat sequence_executed) == stats[sequence_executed] + 16))
(($(get_stat executed encrypt) == stats[encrypt_executed] + 32))
(($(get_stat executed decrypt) == stats[decrypt_executed]))
(($(get_stat executed copy) == stats[copy_executed] + 16))
(($(get_stat executed copy) == stats[copy_executed]))
update_stats
# Check the reads
: > "$output"
spdk_dd --of "$output" --ib Nvme0n1 --bs 4096 --count 16
(($(get_stat sequence_executed) == stats[sequence_executed] + 32))
(($(get_stat sequence_executed) == stats[sequence_executed] + 16))
(($(get_stat executed encrypt) == stats[encrypt_executed]))
(($(get_stat executed decrypt) == stats[decrypt_executed] + 32))
(($(get_stat executed copy) == stats[copy_executed] + 16))
(($(get_stat executed copy) == stats[copy_executed]))
cmp "$input" "$output"
trap - SIGINT SIGTERM EXIT