== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:32:43 (1743496363)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 20.6556 s, 5.1 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff9f00508a9000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.259639
Iter 1/10: OSS cache speed: 0.272339
Iter 1/10: ladvise speed: 0.292439
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.253913
Iter 2/10: OSS cache speed: 0.265354
Iter 2/10: ladvise speed: 0.262165
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.2466
Iter 3/10: OSS cache speed: 0.263453
Iter 3/10: ladvise speed: 0.295447
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.258656
Iter 4/10: OSS cache speed: 0.312518
Iter 4/10: ladvise speed: 0.317009
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.286438
Iter 5/10: OSS cache speed: 0.315613
Iter 5/10: ladvise speed: 0.329318
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.319632
Iter 6/10: OSS cache speed: 0.353148
Iter 6/10: ladvise speed: 0.357939
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.344795
Iter 7/10: OSS cache speed: 0.426588
Iter 7/10: ladvise speed: 0.410282
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.365604
Iter 8/10: OSS cache speed: 0.396797
Iter 8/10: ladvise speed: 0.423753
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.392251
Iter 9/10: OSS cache speed: 0.43199
Iter 9/10: ladvise speed: 0.431206
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.399822
Iter 10/10: OSS cache speed: 0.441091
Iter 10/10: ladvise speed: 0.453186
Average uncached read: .31
Average speedup with OSS cached read:  .34 = +9%
Average speedup with ladvise willread:  .35 = +12%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0