== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:05:45 (1786403145)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.7911 s, 7.6 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-ffff950611c1a000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.33788
Iter 1/10: OSS cache speed: 0.297385
Iter 1/10: ladvise speed: 0.314964
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.346311
Iter 2/10: OSS cache speed: 0.389529
Iter 2/10: ladvise speed: 0.313196
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.340021
Iter 3/10: OSS cache speed: 0.316724
Iter 3/10: ladvise speed: 0.336182
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.326286
Iter 4/10: OSS cache speed: 0.3458
Iter 4/10: ladvise speed: 0.388958
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.320206
Iter 5/10: OSS cache speed: 0.334669
Iter 5/10: ladvise speed: 0.37127
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.341797
Iter 6/10: OSS cache speed: 0.346422
Iter 6/10: ladvise speed: 0.318951
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.3346
Iter 7/10: OSS cache speed: 0.34688
Iter 7/10: ladvise speed: 0.341755
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.376454
Iter 8/10: OSS cache speed: 0.439514
Iter 8/10: ladvise speed: 0.426102
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.330271
Iter 9/10: OSS cache speed: 0.357946
Iter 9/10: ladvise speed: 0.324781
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.310265
Iter 10/10: OSS cache speed: 0.350912
Iter 10/10: ladvise speed: 0.381077
Average uncached read: .33
Average speedup with OSS cached read:  .35 = +6%
Average speedup with ladvise willread:  .35 = +6%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0