libnvme(9) API Manual libnvme(9)

# [NAME](#NAME)

enum nvme\_feat\_perfc\_r4karl - standard performance attribute random 4 kib average latency

# [SYNOPSIS](#SYNOPSIS)

enum nvme\_feat\_perfc\_r4karl {  
**NVME\_FEAT\_PERFC\_R4KARL\_NO\_REPORT** ,  
**NVME\_FEAT\_PERFC\_R4KARL\_GE\_100\_SEC** ,  
**NVME\_FEAT\_PERFC\_R4KARL\_GE\_50\_SEC** ,  
**NVME\_FEAT\_PERFC\_R4KARL\_GE\_10\_SEC** ,  
**NVME\_FEAT\_PERFC\_R4KARL\_GE\_5\_SEC** ,  
**NVME\_FEAT\_PERFC\_R4KARL\_GE\_1\_SEC** ,  
**NVME\_FEAT\_PERFC\_R4KARL\_GE\_500\_MS** ,  
**NVME\_FEAT\_PERFC\_R4KARL\_GE\_100\_MS** ,  
**NVME\_FEAT\_PERFC\_R4KARL\_GE\_50\_MS** ,  
**NVME\_FEAT\_PERFC\_R4KARL\_GE\_10\_MS** ,  
**NVME\_FEAT\_PERFC\_R4KARL\_GE\_5\_MS** ,  
**NVME\_FEAT\_PERFC\_R4KARL\_GE\_1\_MS** ,  
**NVME\_FEAT\_PERFC\_R4KARL\_GE\_500\_US** ,  
**NVME\_FEAT\_PERFC\_R4KARL\_GE\_100\_US** ,  
**NVME\_FEAT\_PERFC\_R4KARL\_GE\_50\_US** ,  
**NVME\_FEAT\_PERFC\_R4KARL\_GE\_10\_US** ,  
**NVME\_FEAT\_PERFC\_R4KARL\_GE\_5\_US** ,  
**NVME\_FEAT\_PERFC\_R4KARL\_GE\_1\_US** ,  
**NVME\_FEAT\_PERFC\_R4KARL\_GE\_500\_NS** ,  
**NVME\_FEAT\_PERFC\_R4KARL\_GE\_100\_NS** ,  
**NVME\_FEAT\_PERFC\_R4KARL\_GE\_50\_NS** ,  
**NVME\_FEAT\_PERFC\_R4KARL\_GE\_10\_NS** ,  
**NVME\_FEAT\_PERFC\_R4KARL\_GE\_5\_NS** ,  
**NVME\_FEAT\_PERFC\_R4KARL\_GE\_1\_NS**

};

# [Constants](#Constants)

[NVME\_FEAT\_PERFC\_R4KARL\_NO\_REPORT](#NVME_FEAT_PERFC_R4KARL_NO_REPORT)

not reported

[NVME\_FEAT\_PERFC\_R4KARL\_GE\_100\_SEC](#NVME_FEAT_PERFC_R4KARL_GE_100_SEC)

greater than or equal to 100 secs

[NVME\_FEAT\_PERFC\_R4KARL\_GE\_50\_SEC](#NVME_FEAT_PERFC_R4KARL_GE_50_SEC)

greater than or equal to 50 secs and less than 100 secs

[NVME\_FEAT\_PERFC\_R4KARL\_GE\_10\_SEC](#NVME_FEAT_PERFC_R4KARL_GE_10_SEC)

greater than or equal to 10 secs and less than 50 secs

[NVME\_FEAT\_PERFC\_R4KARL\_GE\_5\_SEC](#NVME_FEAT_PERFC_R4KARL_GE_5_SEC)

greater than or equal to 5 secs and less than 10 secs

[NVME\_FEAT\_PERFC\_R4KARL\_GE\_1\_SEC](#NVME_FEAT_PERFC_R4KARL_GE_1_SEC)

greater than or equal to 1 sec and less than 5 secs

[NVME\_FEAT\_PERFC\_R4KARL\_GE\_500\_MS](#NVME_FEAT_PERFC_R4KARL_GE_500_MS)

greater than or equal to 500 msecs and less than 1 sec

[NVME\_FEAT\_PERFC\_R4KARL\_GE\_100\_MS](#NVME_FEAT_PERFC_R4KARL_GE_100_MS)

greater than or equal to 100 msecs and less than 500 msecs

[NVME\_FEAT\_PERFC\_R4KARL\_GE\_50\_MS](#NVME_FEAT_PERFC_R4KARL_GE_50_MS)

greater than or equal to 50 msecs and less than 100 msecs

[NVME\_FEAT\_PERFC\_R4KARL\_GE\_10\_MS](#NVME_FEAT_PERFC_R4KARL_GE_10_MS)

greater than or equal to 10 msecs and less than 50 msecs

[NVME\_FEAT\_PERFC\_R4KARL\_GE\_5\_MS](#NVME_FEAT_PERFC_R4KARL_GE_5_MS)

greater than or equal to 5 msecs and less than 10 msecs

[NVME\_FEAT\_PERFC\_R4KARL\_GE\_1\_MS](#NVME_FEAT_PERFC_R4KARL_GE_1_MS)

greater than or equal to 1 msec and less than 5 msecs

[NVME\_FEAT\_PERFC\_R4KARL\_GE\_500\_US](#NVME_FEAT_PERFC_R4KARL_GE_500_US)

greater than or equal to 500 usecs and less than 1 msec

[NVME\_FEAT\_PERFC\_R4KARL\_GE\_100\_US](#NVME_FEAT_PERFC_R4KARL_GE_100_US)

greater than or equal to 100 usecs and less than 500 usecs

[NVME\_FEAT\_PERFC\_R4KARL\_GE\_50\_US](#NVME_FEAT_PERFC_R4KARL_GE_50_US)

greater than or equal to 50 usecs and less than 100 usecs

[NVME\_FEAT\_PERFC\_R4KARL\_GE\_10\_US](#NVME_FEAT_PERFC_R4KARL_GE_10_US)

greater than or equal to 10 usecs and less than 50 usecs

[NVME\_FEAT\_PERFC\_R4KARL\_GE\_5\_US](#NVME_FEAT_PERFC_R4KARL_GE_5_US)

greater than or equal to 5 usecs and less than 10 usecs

[NVME\_FEAT\_PERFC\_R4KARL\_GE\_1\_US](#NVME_FEAT_PERFC_R4KARL_GE_1_US)

greater than or equal to 1 usec and less than 5 usecs

[NVME\_FEAT\_PERFC\_R4KARL\_GE\_500\_NS](#NVME_FEAT_PERFC_R4KARL_GE_500_NS)

greater than or equal to 500 nsecs and less than 1 usec

[NVME\_FEAT\_PERFC\_R4KARL\_GE\_100\_NS](#NVME_FEAT_PERFC_R4KARL_GE_100_NS)

greater than or equal to 100 nsecs and less than 500 nsecs

[NVME\_FEAT\_PERFC\_R4KARL\_GE\_50\_NS](#NVME_FEAT_PERFC_R4KARL_GE_50_NS)

greater than or equal to 50 nsecs and less than 100 nsecs

[NVME\_FEAT\_PERFC\_R4KARL\_GE\_10\_NS](#NVME_FEAT_PERFC_R4KARL_GE_10_NS)

greater than or equal to 10 nsecs and less than 50 nsecs

[NVME\_FEAT\_PERFC\_R4KARL\_GE\_5\_NS](#NVME_FEAT_PERFC_R4KARL_GE_5_NS)

greater than or equal to 5 nsecs and less than 10 nsecs

[NVME\_FEAT\_PERFC\_R4KARL\_GE\_1\_NS](#NVME_FEAT_PERFC_R4KARL_GE_1_NS)

greater than or equal to 1 nsec and less than 5 nsecs

enum nvme\_feat\_perfc\_r4karl October 2026

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Document: nvme_feat_perfc_r4karl-libnvme3(2) from nvme-cli 3.2-r0 (Chainguard OS)
Source: https://github.com/linux-nvme/nvme-cli