== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:14:05 (1753427645)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.1508 s, 14.7 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-ffff9cb285204000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.305
Iter 1/10: OSS cache speed: 1.27394
Iter 1/10: ladvise speed: 1.10234
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.17752
Iter 2/10: OSS cache speed: 1.88206
Iter 2/10: ladvise speed: 2.25104
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.14134
Iter 3/10: OSS cache speed: 2.18228
Iter 3/10: ladvise speed: 2.06784
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.90272
Iter 4/10: OSS cache speed: 2.16426
Iter 4/10: ladvise speed: 2.30663
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.92133
Iter 5/10: OSS cache speed: 2.18277
Iter 5/10: ladvise speed: 2.53492
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.26523
Iter 6/10: OSS cache speed: 2.44528
Iter 6/10: ladvise speed: 2.6043
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.32171
Iter 7/10: OSS cache speed: 2.66829
Iter 7/10: ladvise speed: 2.59481
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.30924
Iter 8/10: OSS cache speed: 2.5948
Iter 8/10: ladvise speed: 2.61289
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.21329
Iter 9/10: OSS cache speed: 1.34262
Iter 9/10: ladvise speed: 1.61549
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.37423
Iter 10/10: OSS cache speed: 1.19264
Iter 10/10: ladvise speed: 1.46743
Average uncached read: 1.89
Average speedup with OSS cached read:  1.99 = +5%
Average speedup with ladvise willread:  2.11 = +11%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0