AIR 0.8.7-beta

🔨 Updated

• Remove 'node sampling' option

AIR 0.8.6-beta

⭐ New Feature

• Add file related config option: FileWrite, RemainingFileCount
• Add file related cli option: air-file-write, air-remain-file-count

AIR 0.8.5-beta

🔨 Updated

• Remove 'new_' prefix of variables
• Remove latency data(vector) reserve scheme

AIR 0.8.4-beta

🔨 Updated

• Modify AIR configuration filter rule: Doesn't need to use "AIR_" prefix anymore
• Reinforce filter syntax

AIR 0.8.3-beta

🔨 Updated

• Support Address Sanitizer(ASAN) to detect memory corruption bugs
• Improve latency sampling scheme in a small workload
• Send output data even if periodic data is empty but cumulated data is not empty
• Update build sequence to perceive config file change

AIR 0.8.2-beta

🔨 Updated

• Updated compile option for debug friendly
• Updated config rule to check forbidden words(Node's key)
• Replaced Preprocessor's vector to an array to avoid dynamic memory reallocation

🚧 Fixed

• Fixed memory leak when Transfer::SendData(void) call

AIR 0.7.4-beta

[SHPOS-746] Change vector to array

- Change Preprocessor's std::vector to array for avoiding dynamic memory reallocation
- Add debug option

Signed-off-by: isaac.baek <[email protected]>

AIR 0.8.0-beta

⭐ New Feature

• AIR output format is changed to distinguish between period data and cumulation data from object data.
• TUI supports --file(f)=<filename> option to read an offline output data.
• In TUI, user can see previous timeline data.

TUI mode: [online], status: [pause], page: [7/12],  interval: [1],  timestamp: 2022-3-4:15:34:39, pid: 18544
key {↑/↓}: move, {→/←}: (un)fold, {b}: perv page, {n}: next page, {space}: play/pause
    {1~9}: streaming interval, {i}: init, {o}: run, {x}: stop, {q(esc)}: quit
(*)   Top
( )   +Group:COMMON
( )[O]++Node:LAT_PROCESS("latency")
      ""(0), index:0x200, filter:"AIR_0~AIR_1" Period(avg:650ns, median:610ns, max:3.0us, sample:100    ), Cumulation(avg:833ns, median:575ns, max:14us , sample:598    )
      ""(0), index:0x201, filter:"AIR_0~AIR_1" Period(avg:567ns, median:415ns, max:3.7us, sample:99     ), Cumulation(avg:807ns, median:554ns, max:11us , sample:597    )
( )[O]++Node:PERF_BENCHMARK("performance")
        SUM Period(iops:2.0M   , bw:8.1GB   ), Cumulation(iops:2.4M   , bw:9.9GB   )
      "CompleteIO"(18552), index:0x200, filter:"AIR_READ" Period(iops:967.4K , bw:4.0GB   , count:[{"4096": 1131761}]), Cumulation(iops:1.2M   , bw:4.7GB   )
      "CompleteIO"(18552), index:0x201, filter:"AIR_READ" Period(iops:1.0M   , bw:4.2GB   , count:[{"4096": 1187940}]), Cumulation(iops:1.3M   , bw:5.1GB   )
( )   +Group:COMPLETE
( )[O]++Node:LAT_COMPLETE("latency")
      ""(0), index:0x0, filter:"AIR_0~AIR_1" Period(avg:131ns, median:94ns , max:677ns, sample:100    ), Cumulation(avg:153ns, median:99ns , max:5.3us, sample:600    )
( )[.]..Node:Q_COMPLETION

⚡ Performance

• Benchmarked airlog(...) API
  Run on (160 X 3700 MHz CPU s)
  CPU Caches:
  L1 Data 32 KiB (x80)
  L1 Instruction 32 KiB (x80)
  L2 Unified 1024 KiB (x80)
  L3 Unified 28160 KiB (x4)

Logging type	Time	Iterations
Performance	7.69ns	1,000,000,000
Queue	7.12ns	1,000,000,000
Latency	10.7ns	1,000,000,000
Utilization	5.42ns	1,000,000,000
Count	6.25ns	1,000,000,000
Histogram_Linear	14.4ns	968,453,298
Histogram_Exponential	60.2ns	233,138,692

AIR 0.7.2-beta

⭐ New Feature

• Add a new logging type Histogram for airlog(node_name, filter_item, node_index, data) API to support histogram information.
  Now, user can define Histogram type node at AIR configuration file.

[BUCKET]
    "Bucket: BUCKET_3, Bounds: [-100, 80), Scale: 20"
    "Bucket: BUCKET_6, Bounds: (-10^3, 10^5), Scale: 10^"
[/BUCKET]

[NODE]
    "Node: HIST_SAMPLE_3,   Filter: AIR_Basic,   Type: Histogram,    Group: COMMON,     IndexSize: 10,   Bucket: BUCKET_3"
    "Node: HIST_SAMPLE_6,   Filter: AIR_Basic,   Type: Histogram,    Group: COMMON,     IndexSize: 10,   Bucket: BUCKET_6"
[/NODE]

And here is a reference code to use histogram type airlog(...)

airlog("HIST_SAMPLE_3", "AIR_BASE", 0, -100);
...
airlog("HIST_SAMPLE_6", "AIR_BASE", 1, 99999);

And also, user can read data using air_tui

( )[O]++Node:HIST_SAMPLE_3("histogram")
      "HistogramLog"(19471), index:0x0, filter:"AIR_0", bucket_type:"linear"
        Unit    value:(minimum/average/maximum) count:(underflow -100    -80     -60     -40     -20     0       20      40      60      80      overflow)
        Period         -101    -50     -20             18.9K      |18.9K  |18.9K  |18.9K  |18.9K  |18.9K  |0      |0      |0      |0      |      0
        Cumulation     -101    -50     -20             94.3K      |94.3K  |94.3K  |94.3K  |94.3K  |94.3K  |0      |0      |0      |0      |      0
      "HistogramLog"(19471), index:0x1, filter:"AIR_0", bucket_type:"linear"
        Unit    value:(minimum/average/maximum) count:(underflow -100    -80     -60     -40     -20     0       20      40      60      80      overflow)
        Period         0       40      80              0          |0      |0      |0      |0      |0      |18.9K  |18.9K  |18.9K  |18.9K  |      18.9K
        Cumulation     0       40      80              0          |0      |0      |0      |0      |0      |94.3K  |94.3K  |94.3K  |94.3K  |      94.3K
( )[O]++Node:HIST_SAMPLE_6("histogram")
      "HistogramLog"(19471), index:0x0, filter:"AIR_0", bucket_type:"exponential"
        Unit    value:(minimum/average/maximum) count:(underflow -1.0K   -100    -10     -1  0   1       10      100     1.0K    10.0K   100.0K  overflow)
        Period         -1.0K   6.7K    100.0K          18.9K      |18.9K  |18.9K  |18.9K  |18.9K  |18.9K  |18.9K  |18.9K  |18.9K  |18.9K  |      18.9K
        Cumulation     -1.0K   6.7K    100.0K          94.3K      |94.3K  |94.3K  |94.3K  |94.3K  |94.3K  |94.3K  |94.3K  |94.3K  |94.3K  |      94.3K

⚡ Performance

• Benchmarked airlog(...) API
  Run on (160 X 3700 MHz CPU s)
  CPU Caches:
  L1 Data 32 KiB (x80)
  L1 Instruction 32 KiB (x80)
  L2 Unified 1024 KiB (x80)
  L3 Unified 28160 KiB (x4)

Logging type	Time	Iterations
Performance	7.68ns	1,000,000,000
Queue	7.23ns	1,000,000,000
Latency	10.6ns	1,000,000,000
Utilization	5.49ns	1,000,000,000
Count	6.24ns	1,000,000,000
Histogram_Linear	14.4ns	968,453,307
Histogram_Exponential	60.0ns	233,138,718

🚧 Fixed

• Fixed a bug in air_tui hang issue when a number overflowed
• Fixed latency logging mismatch issue cause of too small buffer

AIR 0.7.1-beta

✔ Optimizations

• Optimized airlog(node_name, filter_item, node_index, data) APIs
  Run on (160 X 3700 MHz CPU s)
  CPU Caches:
  L1 Data 32 KiB (x80)
  L1 Instruction 32 KiB (x80)
  L2 Unified 1024 KiB (x80)
  L3 Unified 28160 KiB (x4)
  AIR_API/Type_Performance: 8.46ns -> 7.51ns (11% improvement)
  AIR_API/Type_Latency: 12.6ns -> 10.7ns (15% improvement)
  AIR_API/Type_Queue: 9.76ns -> 7.29ns (25% improvement)
  AIR_API/Type_Utilization: 7.07ns -> 5.44ns (23% improvement)
  AIR_API/Type_Count: 7.31ns -> 6.41ns (12% improvement)

• Optimized latency post-processing
  Latency stress test on PSD server
  AIR CPU Utilization: 80+% -> 20%

🚧 Fixed

• Fixed latency format in air_tui to float type if the value is one digit number
• Fixed a bug in air_tui that ignored STDIN