== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:55:20 (1772474120)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.42902 s, 14.1 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-ffff907190626000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.601841
Iter 1/10: OSS cache speed: 0.71079
Iter 1/10: ladvise speed: 0.697374
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.638914
Iter 2/10: OSS cache speed: 0.741097
Iter 2/10: ladvise speed: 0.774674
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.778195
Iter 3/10: OSS cache speed: 0.937344
Iter 3/10: ladvise speed: 0.877133
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.701805
Iter 4/10: OSS cache speed: 0.87785
Iter 4/10: ladvise speed: 1.03415
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.834666
Iter 5/10: OSS cache speed: 1.15453
Iter 5/10: ladvise speed: 1.32037
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.0629
Iter 6/10: OSS cache speed: 1.16809
Iter 6/10: ladvise speed: 1.29824
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.20074
Iter 7/10: OSS cache speed: 1.32459
Iter 7/10: ladvise speed: 1.78565
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.68678
Iter 8/10: OSS cache speed: 1.98707
Iter 8/10: ladvise speed: 2.11456
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.82152
Iter 9/10: OSS cache speed: 1.79318
Iter 9/10: ladvise speed: 1.74397
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.7072
Iter 10/10: OSS cache speed: 1.99107
Iter 10/10: ladvise speed: 1.63181
Average uncached read: 1.10
Average speedup with OSS cached read:  1.26 = +14%
Average speedup with ladvise willread:  1.32 = +20%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0