== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:02:24 (1787698944)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.5468 s, 9.9 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-ffff907ee002e800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.365601
Iter 1/10: OSS cache speed: 0.418807
Iter 1/10: ladvise speed: 0.453436
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.359802
Iter 2/10: OSS cache speed: 0.411499
Iter 2/10: ladvise speed: 0.402048
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.305361
Iter 3/10: OSS cache speed: 0.370197
Iter 3/10: ladvise speed: 0.366264
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.36135
Iter 4/10: OSS cache speed: 0.359044
Iter 4/10: ladvise speed: 0.4132
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.345763
Iter 5/10: OSS cache speed: 0.360176
Iter 5/10: ladvise speed: 0.395663
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.363589
Iter 6/10: OSS cache speed: 0.341784
Iter 6/10: ladvise speed: 0.454571
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.362702
Iter 7/10: OSS cache speed: 0.415527
Iter 7/10: ladvise speed: 0.397038
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.343658
Iter 8/10: OSS cache speed: 0.407707
Iter 8/10: ladvise speed: 0.376938
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.330336
Iter 9/10: OSS cache speed: 0.353817
Iter 9/10: ladvise speed: 0.359469
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.346573
Iter 10/10: OSS cache speed: 0.375968
Iter 10/10: ladvise speed: 0.373458
Average uncached read: .34
Average speedup with OSS cached read:  .38 = +11%
Average speedup with ladvise willread:  .39 = +14%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0