== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:57:06 (1786172226)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.2747 s, 8.5 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-ffff8f3a50d53800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.451041
Iter 1/10: OSS cache speed: 0.501321
Iter 1/10: ladvise speed: 0.553335
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.296619
Iter 2/10: OSS cache speed: 0.503115
Iter 2/10: ladvise speed: 0.453692
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.438215
Iter 3/10: OSS cache speed: 0.483118
Iter 3/10: ladvise speed: 0.378201
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.472075
Iter 4/10: OSS cache speed: 0.544063
Iter 4/10: ladvise speed: 0.509294
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.480332
Iter 5/10: OSS cache speed: 0.474754
Iter 5/10: ladvise speed: 0.43308
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.278663
Iter 6/10: OSS cache speed: 0.421156
Iter 6/10: ladvise speed: 0.451574
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.448537
Iter 7/10: OSS cache speed: 0.407316
Iter 7/10: ladvise speed: 0.464061
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.398023
Iter 8/10: OSS cache speed: 0.40795
Iter 8/10: ladvise speed: 0.460895
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.35442
Iter 9/10: OSS cache speed: 0.374171
Iter 9/10: ladvise speed: 0.440817
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.477119
Iter 10/10: OSS cache speed: 0.328525
Iter 10/10: ladvise speed: 0.434315
Average uncached read: .40
Average speedup with OSS cached read:  .44 = +10%
Average speedup with ladvise willread:  .45 = +12%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0