== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:29:11 (1746145751)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 5.77098 s, 18.2 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-ffff88012ab3b800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.762235
Iter 1/10: OSS cache speed: 0.887672
Iter 1/10: ladvise speed: 0.955736
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.907764
Iter 2/10: OSS cache speed: 0.980007
Iter 2/10: ladvise speed: 1.05896
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.941291
Iter 3/10: OSS cache speed: 1.2589
Iter 3/10: ladvise speed: 1.20205
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.23836
Iter 4/10: OSS cache speed: 1.64452
Iter 4/10: ladvise speed: 1.79263
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.36465
Iter 5/10: OSS cache speed: 1.64583
Iter 5/10: ladvise speed: 1.81129
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.18503
Iter 6/10: OSS cache speed: 1.22542
Iter 6/10: ladvise speed: 1.42602
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.952531
Iter 7/10: OSS cache speed: 1.12686
Iter 7/10: ladvise speed: 1.00526
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.855038
Iter 8/10: OSS cache speed: 1.13552
Iter 8/10: ladvise speed: 1.48801
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.0944
Iter 9/10: OSS cache speed: 1.3879
Iter 9/10: ladvise speed: 1.19891
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.36119
Iter 10/10: OSS cache speed: 1.24202
Iter 10/10: ladvise speed: 1.17376
Average uncached read: 1.06
Average speedup with OSS cached read:  1.25 = +17%
Average speedup with ladvise willread:  1.31 = +23%
Speedup with OSS cached read less than 20%,  got 17%. Skipping ladvise willread check.
fail_loc=0