== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:15:44 (1753427744)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.85321 s, 15.3 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-ffff99e783036000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.55869
Iter 1/10: OSS cache speed: 1.45489
Iter 1/10: ladvise speed: 1.43704
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.37165
Iter 2/10: OSS cache speed: 1.3813
Iter 2/10: ladvise speed: 1.19013
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.14704
Iter 3/10: OSS cache speed: 1.37628
Iter 3/10: ladvise speed: 1.4813
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.76294
Iter 4/10: OSS cache speed: 1.86746
Iter 4/10: ladvise speed: 1.99229
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.89817
Iter 5/10: OSS cache speed: 1.68763
Iter 5/10: ladvise speed: 1.93351
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.56148
Iter 6/10: OSS cache speed: 1.74784
Iter 6/10: ladvise speed: 1.75893
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.49707
Iter 7/10: OSS cache speed: 1.78869
Iter 7/10: ladvise speed: 0.571728
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.63489
Iter 8/10: OSS cache speed: 0.594263
Iter 8/10: ladvise speed: 0.835252
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.570192
Iter 9/10: OSS cache speed: 0.844826
Iter 9/10: ladvise speed: 1.87572
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.93457
Iter 10/10: OSS cache speed: 2.02895
Iter 10/10: ladvise speed: 2.07443
Average uncached read: 1.39
Average speedup with OSS cached read:  1.47 = +5%
Average speedup with ladvise willread:  1.51 = +8%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0