== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:52:40 (1787122360)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.0225 s, 7.0 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-ffff98cf913ee000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.315998
Iter 1/10: OSS cache speed: 0.324179
Iter 1/10: ladvise speed: 0.332627
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.327266
Iter 2/10: OSS cache speed: 0.330946
Iter 2/10: ladvise speed: 0.311802
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.27616
Iter 3/10: OSS cache speed: 0.313661
Iter 3/10: ladvise speed: 0.338453
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.278765
Iter 4/10: OSS cache speed: 0.373935
Iter 4/10: ladvise speed: 0.357121
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.319974
Iter 5/10: OSS cache speed: 0.344681
Iter 5/10: ladvise speed: 0.338087
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.309261
Iter 6/10: OSS cache speed: 0.383781
Iter 6/10: ladvise speed: 0.368875
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.332757
Iter 7/10: OSS cache speed: 0.34981
Iter 7/10: ladvise speed: 0.374332
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.28328
Iter 8/10: OSS cache speed: 0.357543
Iter 8/10: ladvise speed: 0.343448
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.385138
Iter 9/10: OSS cache speed: 0.42983
Iter 9/10: ladvise speed: 0.365121
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.359876
Iter 10/10: OSS cache speed: 0.347802
Iter 10/10: ladvise speed: 0.365047
Average uncached read: .31
Average speedup with OSS cached read:  .35 = +12%
Average speedup with ladvise willread:  .34 = +9%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0