zeroshade commented on code in PR #37785:
URL: https://github.com/apache/arrow/pull/37785#discussion_r1343241161
##########
go/parquet/internal/bmi/bmi_arm64.go:
##########
@@ -14,44 +14,51 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+//go:build !noasm
// +build !noasm
package bmi
import (
+ "fmt"
"os"
"strings"
-)
-import (
- "golang.org/x/sys/cpu"
Review Comment:
@cyb70289 Here is the output of `lscpu` on the AWS EC2 instance that I've
been using for testing:
```shell
admin@ip-172-31-78-97:~/arrow/go/parquet/internal/utils$ lscpu
Architecture: aarch64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 1
On-line CPU(s) list: 0
Vendor ID: ARM
Model name: Neoverse-N1
Model: 1
Thread(s) per core: 1
Core(s) per socket: 1
Socket(s): 1
Stepping: r3p1
BogoMIPS: 243.75
Flags: fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics
fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp ssbs
Caches (sum of all):
L1d: 64 KiB (1 instance)
L1i: 64 KiB (1 instance)
L2: 1 MiB (1 instance)
L3: 32 MiB (1 instance)
NUMA:
NUMA node(s): 1
NUMA node0 CPU(s): 0
Vulnerabilities:
Gather data sampling: Not affected
Itlb multihit: Not affected
L1tf: Not affected
Mds: Not affected
Meltdown: Not affected
Mmio stale data: Not affected
Retbleed: Not affected
Spec rstack overflow: Not affected
Spec store bypass: Mitigation; Speculative Store Bypass disabled via
prctl
Spectre v1: Mitigation; __user pointer sanitization
Spectre v2: Mitigation; CSV2, BHB
Srbds: Not affected
Tsx async abort: Not affected
```
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