接口速率显示占用100%但没跑满

插的10g光模块，接口下利用率显示100%，但速率只有8.6G，这是正常现象吗

Twenty-FiveGigE1/0/27

Current state: UP

Line protocol state: UP

IP packet frame type: Ethernet II, hardware address: 1484-7708-4876

Description: test

Bandwidth: 10000000 kbps

Loopback is not set

Media type is optical fiber, port hardware type is 10G_BASE_SR_SFP

FEC mode: None

10Gbps-speed mode, full-duplex mode

Link speed type is autonegotiation, link duplex type is autonegotiation

Flow-control is not enabled

Maximum frame length: 13312

Forbid jumbo frames to pass

Broadcast max-pps: 1000

Unknown-multicast max-pps: 1000

Unicast max-pps: 1000

Known-unicast max-ratio: 100%

PVID: 89

Port link-type: Trunk

 VLAN Passing:   53, 89, 91-92, 99-100, 951

 VLAN permitted: 53, 89, 91-92, 99-100, 951

 Trunk port encapsulation: IEEE 802.1q

Port priority: 0

Last link flapping: 16 hours 29 minutes 59 seconds

Last clearing of counters: Never

Current system time:2025-06-05 09:53:19 beijing+08:00:00

Last time when physical state changed to up:2025-06-04 17:23:21 beijing+08:00:00

Last time when physical state changed to down:2025-06-04 17:23:20 beijing+08:00:00

 Peak input rate: 1078777132 bytes/sec, at 2025-06-05 09:51:09

 Peak output rate: 925532 bytes/sec, at 2025-05-12 19:44:36

 Last 300 seconds input: 8561140 packets/sec 1078703948 bytes/sec 100%

 Last 300 seconds output: 523 packets/sec 70553 bytes/sec 0%

 Input (total):  60657066841 packets, 7980757986889 bytes

         60656985397 unicasts, 280 broadcasts, 82698 multicasts, 0 pauses

 Input (normal):  60657075279 packets, 7980759048439 bytes

         60656992301 unicasts, 280 broadcasts, 82698 multicasts, 0 pauses

 Input:  0 input errors, 0 runts, 0 giants, - throttles

         0 CRC, - frame, 0 overruns, - aborts

         - ignored, - parity errors

 Output (total): 45123696 packets, 5172721089 bytes

         13547428 unicasts, 1898689 broadcasts, 29677579 multicasts, 0 pauses

 Output (normal): 45123697 packets, 5172721225 bytes

         13547429 unicasts, 1898689 broadcasts, 29677579 multicasts, 0 pauses

 Output: 0 output errors, 0 underruns, - buffer failures

         - aborts, - deferred, - collisions, - late collisions

         - lost carrier, - no carrier