== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:13:01 (1790943181)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.6268 s, 7.7 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-ffff964a02c1f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.368044
Iter 1/10: OSS cache speed: 0.437645
Iter 1/10: ladvise speed: 0.3108
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.321335
Iter 2/10: OSS cache speed: 0.385601
Iter 2/10: ladvise speed: 0.379309
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.256769
Iter 3/10: OSS cache speed: 0.290819
Iter 3/10: ladvise speed: 0.430002
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.363929
Iter 4/10: OSS cache speed: 0.321195
Iter 4/10: ladvise speed: 0.343365
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.317017
Iter 5/10: OSS cache speed: 0.379194
Iter 5/10: ladvise speed: 0.379593
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.300646
Iter 6/10: OSS cache speed: 0.355236
Iter 6/10: ladvise speed: 0.327905
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.268358
Iter 7/10: OSS cache speed: 0.370283
Iter 7/10: ladvise speed: 0.343185
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.31701
Iter 8/10: OSS cache speed: 0.399446
Iter 8/10: ladvise speed: 0.401111
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.428725
Iter 9/10: OSS cache speed: 0.455863
Iter 9/10: ladvise speed: 0.520288
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.470533
Iter 10/10: OSS cache speed: 0.496305
Iter 10/10: ladvise speed: 0.45119
Average uncached read: .34
Average speedup with OSS cached read:  .38 = +11%
Average speedup with ladvise willread:  .38 = +11%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0