== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:05:20 (1788354320)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.42404 s, 16.3 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-ffff9a7283efc000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.06903
Iter 1/10: OSS cache speed: 2.00188
Iter 1/10: ladvise speed: 2.00857
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.04265
Iter 2/10: OSS cache speed: 2.05503
Iter 2/10: ladvise speed: 2.05746
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.07496
Iter 3/10: OSS cache speed: 2.05449
Iter 3/10: ladvise speed: 2.05621
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.06171
Iter 4/10: OSS cache speed: 2.08171
Iter 4/10: ladvise speed: 1.98198
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.00694
Iter 5/10: OSS cache speed: 2.027
Iter 5/10: ladvise speed: 2.08315
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.05129
Iter 6/10: OSS cache speed: 2.06282
Iter 6/10: ladvise speed: 1.98187
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.11299
Iter 7/10: OSS cache speed: 2.11454
Iter 7/10: ladvise speed: 2.02436
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.03336
Iter 8/10: OSS cache speed: 2.07677
Iter 8/10: ladvise speed: 2.11857
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.59833
Iter 9/10: OSS cache speed: 0.997508
Iter 9/10: ladvise speed: 1.40738
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.67619
Iter 10/10: OSS cache speed: 1.62376
Iter 10/10: ladvise speed: 1.42523
Average uncached read: 1.97
Average speedup with OSS cached read:  1.90 = +-3%
Average speedup with ladvise willread:  1.91 = +-3%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0