== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:59:03 (1768557543)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.3128 s, 7.9 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-ffff90f590c09000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.345393
Iter 1/10: OSS cache speed: 0.354371
Iter 1/10: ladvise speed: 0.379023
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.366419
Iter 2/10: OSS cache speed: 0.389612
Iter 2/10: ladvise speed: 0.349272
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.410779
Iter 3/10: OSS cache speed: 0.41552
Iter 3/10: ladvise speed: 0.462129
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.4765
Iter 4/10: OSS cache speed: 0.495933
Iter 4/10: ladvise speed: 0.461217
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.460199
Iter 5/10: OSS cache speed: 0.414498
Iter 5/10: ladvise speed: 0.452323
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.372615
Iter 6/10: OSS cache speed: 0.504738
Iter 6/10: ladvise speed: 0.365052
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.391117
Iter 7/10: OSS cache speed: 0.436294
Iter 7/10: ladvise speed: 0.463709
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.447514
Iter 8/10: OSS cache speed: 0.424772
Iter 8/10: ladvise speed: 0.384285
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.407478
Iter 9/10: OSS cache speed: 0.35245
Iter 9/10: ladvise speed: 0.440903
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.406293
Iter 10/10: OSS cache speed: 0.462604
Iter 10/10: ladvise speed: 0.33996
Average uncached read: .40
Average speedup with OSS cached read:  .42 = +5%
Average speedup with ladvise willread:  .40 = +0%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0