== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:39:41 (1788392381)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.22296 s, 14.5 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-ffff8c2b4888d800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.992281
Iter 1/10: OSS cache speed: 1.2152
Iter 1/10: ladvise speed: 1.30383
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.14975
Iter 2/10: OSS cache speed: 1.45644
Iter 2/10: ladvise speed: 0.772851
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.572074
Iter 3/10: OSS cache speed: 0.702575
Iter 3/10: ladvise speed: 0.782884
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.391468
Iter 4/10: OSS cache speed: 0.285416
Iter 4/10: ladvise speed: 0.469249
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.417208
Iter 5/10: OSS cache speed: 0.436517
Iter 5/10: ladvise speed: 0.433234
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.439272
Iter 6/10: OSS cache speed: 0.41549
Iter 6/10: ladvise speed: 0.408361
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.40922
Iter 7/10: OSS cache speed: 0.486568
Iter 7/10: ladvise speed: 0.406798
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.354102
Iter 8/10: OSS cache speed: 0.437062
Iter 8/10: ladvise speed: 0.394643
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.368649
Iter 9/10: OSS cache speed: 0.408838
Iter 9/10: ladvise speed: 0.451521
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.425458
Iter 10/10: OSS cache speed: 0.440179
Iter 10/10: ladvise speed: 0.410743
Average uncached read: .55
Average speedup with OSS cached read:  .62 = +12%
Average speedup with ladvise willread:  .58 = +5%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0