== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:59:51 (1762167591)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.57387 s, 18.8 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-ffff968109257000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.18099
Iter 1/10: OSS cache speed: 2.27333
Iter 1/10: ladvise speed: 2.50991
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.15247
Iter 2/10: OSS cache speed: 2.47534
Iter 2/10: ladvise speed: 2.58727
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.23725
Iter 3/10: OSS cache speed: 1.83126
Iter 3/10: ladvise speed: 0.845229
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.806905
Iter 4/10: OSS cache speed: 0.860576
Iter 4/10: ladvise speed: 0.823783
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.78183
Iter 5/10: OSS cache speed: 0.745395
Iter 5/10: ladvise speed: 1.00831
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.982205
Iter 6/10: OSS cache speed: 1.27187
Iter 6/10: ladvise speed: 1.21893
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.16275
Iter 7/10: OSS cache speed: 1.46397
Iter 7/10: ladvise speed: 2.07699
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.79415
Iter 8/10: OSS cache speed: 1.77884
Iter 8/10: ladvise speed: 0.783502
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.672502
Iter 9/10: OSS cache speed: 0.849367
Iter 9/10: ladvise speed: 0.911427
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.778095
Iter 10/10: OSS cache speed: 0.860438
Iter 10/10: ladvise speed: 0.996603
Average uncached read: 1.35
Average speedup with OSS cached read:  1.44 = +6%
Average speedup with ladvise willread:  1.37 = +1%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0