== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:56:14 (1787367374)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.1126 s, 8.0 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-ffff9b6407273800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.532159
Iter 1/10: OSS cache speed: 0.545941
Iter 1/10: ladvise speed: 0.44527
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.518313
Iter 2/10: OSS cache speed: 0.524423
Iter 2/10: ladvise speed: 0.536027
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.448015
Iter 3/10: OSS cache speed: 0.546615
Iter 3/10: ladvise speed: 0.502074
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.591696
Iter 4/10: OSS cache speed: 0.619441
Iter 4/10: ladvise speed: 0.511577
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.450355
Iter 5/10: OSS cache speed: 0.458535
Iter 5/10: ladvise speed: 0.572428
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.527664
Iter 6/10: OSS cache speed: 0.524209
Iter 6/10: ladvise speed: 0.499986
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.461066
Iter 7/10: OSS cache speed: 0.422519
Iter 7/10: ladvise speed: 0.439397
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.415446
Iter 8/10: OSS cache speed: 0.525265
Iter 8/10: ladvise speed: 0.49077
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.546857
Iter 9/10: OSS cache speed: 0.475164
Iter 9/10: ladvise speed: 0.433897
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.406873
Iter 10/10: OSS cache speed: 0.435323
Iter 10/10: ladvise speed: 0.416425
Average uncached read: .48
Average speedup with OSS cached read:  .50 = +4%
Average speedup with ladvise willread:  .48 = +0%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0