== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:32:09 (1786192329)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.16488 s, 14.6 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-ffff9fcb1283e800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.673792
Iter 1/10: OSS cache speed: 0.817038
Iter 1/10: ladvise speed: 0.943634
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.669346
Iter 2/10: OSS cache speed: 0.697446
Iter 2/10: ladvise speed: 0.623762
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.573524
Iter 3/10: OSS cache speed: 0.836374
Iter 3/10: ladvise speed: 1.03537
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.908594
Iter 4/10: OSS cache speed: 1.06125
Iter 4/10: ladvise speed: 1.36542
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.14768
Iter 5/10: OSS cache speed: 1.24972
Iter 5/10: ladvise speed: 1.6613
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.66488
Iter 6/10: OSS cache speed: 2.08633
Iter 6/10: ladvise speed: 2.02198
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.57096
Iter 7/10: OSS cache speed: 1.7318
Iter 7/10: ladvise speed: 1.83923
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.88416
Iter 8/10: OSS cache speed: 2.17666
Iter 8/10: ladvise speed: 2.19381
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.11869
Iter 9/10: OSS cache speed: 2.44632
Iter 9/10: ladvise speed: 2.49835
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.26182
Iter 10/10: OSS cache speed: 2.37147
Iter 10/10: ladvise speed: 2.42751
Average uncached read: 1.34
Average speedup with OSS cached read:  1.54 = +14%
Average speedup with ladvise willread:  1.66 = +23%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0