== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:12:50 (1788588770)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.275 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-ffff913247eb2000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.396168
Iter 1/10: OSS cache speed: 0.397214
Iter 1/10: ladvise speed: 0.393705
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.416768
Iter 2/10: OSS cache speed: 0.376288
Iter 2/10: ladvise speed: 0.38802
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.490144
Iter 3/10: OSS cache speed: 0.50561
Iter 3/10: ladvise speed: 0.454547
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.411828
Iter 4/10: OSS cache speed: 0.419991
Iter 4/10: ladvise speed: 0.439267
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.46952
Iter 5/10: OSS cache speed: 0.471821
Iter 5/10: ladvise speed: 0.452514
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.442111
Iter 6/10: OSS cache speed: 0.452253
Iter 6/10: ladvise speed: 0.428579
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.426216
Iter 7/10: OSS cache speed: 0.488045
Iter 7/10: ladvise speed: 0.391035
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.469264
Iter 8/10: OSS cache speed: 0.442819
Iter 8/10: ladvise speed: 0.397488
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.353603
Iter 9/10: OSS cache speed: 0.416219
Iter 9/10: ladvise speed: 0.464255
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.389398
Iter 10/10: OSS cache speed: 0.361303
Iter 10/10: ladvise speed: 0.424574
Average uncached read: .42
Average speedup with OSS cached read:  .43 = +2%
Average speedup with ladvise willread:  .42 = +0%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0