== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:56:44 (1784278604)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.85051 s, 15.3 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-ffff94b5d9f4d800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.39935
Iter 1/10: OSS cache speed: 0.356402
Iter 1/10: ladvise speed: 0.432075
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.429166
Iter 2/10: OSS cache speed: 0.469951
Iter 2/10: ladvise speed: 0.487315
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.431606
Iter 3/10: OSS cache speed: 0.50655
Iter 3/10: ladvise speed: 0.504913
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.438129
Iter 4/10: OSS cache speed: 0.445974
Iter 4/10: ladvise speed: 0.571723
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.516517
Iter 5/10: OSS cache speed: 0.581338
Iter 5/10: ladvise speed: 0.644489
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.518198
Iter 6/10: OSS cache speed: 0.612125
Iter 6/10: ladvise speed: 0.615894
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.590362
Iter 7/10: OSS cache speed: 0.659867
Iter 7/10: ladvise speed: 0.726683
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.614563
Iter 8/10: OSS cache speed: 0.685988
Iter 8/10: ladvise speed: 0.713361
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.638703
Iter 9/10: OSS cache speed: 0.826904
Iter 9/10: ladvise speed: 0.760701
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.697027
Iter 10/10: OSS cache speed: 0.89385
Iter 10/10: ladvise speed: 0.486609
Average uncached read: .52
Average speedup with OSS cached read:  .60 = +15%
Average speedup with ladvise willread:  .59 = +13%
Speedup with OSS cached read less than 20%,  got 15%. Skipping ladvise willread check.
fail_loc=0