== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:08:14 (1750180094)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 5.49303 s, 19.1 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-ffff88012aac7800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.876157
Iter 1/10: OSS cache speed: 0.931149
Iter 1/10: ladvise speed: 0.957417
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.863759
Iter 2/10: OSS cache speed: 0.920601
Iter 2/10: ladvise speed: 0.99052
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.931241
Iter 3/10: OSS cache speed: 1.01481
Iter 3/10: ladvise speed: 0.981156
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.876411
Iter 4/10: OSS cache speed: 1.02039
Iter 4/10: ladvise speed: 0.905952
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.763601
Iter 5/10: OSS cache speed: 0.955603
Iter 5/10: ladvise speed: 0.971662
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.825754
Iter 6/10: OSS cache speed: 0.899669
Iter 6/10: ladvise speed: 0.922507
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.0384
Iter 7/10: OSS cache speed: 1.22881
Iter 7/10: ladvise speed: 1.13139
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.956061
Iter 8/10: OSS cache speed: 0.937514
Iter 8/10: ladvise speed: 1.11723
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.10077
Iter 9/10: OSS cache speed: 1.13209
Iter 9/10: ladvise speed: 1.08065
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.954494
Iter 10/10: OSS cache speed: 1.10709
Iter 10/10: ladvise speed: 1.16486
Average uncached read: .91
Average speedup with OSS cached read:  1.01 = +10%
Average speedup with ladvise willread:  1.02 = +12%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0