== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:56:29 (1781618189)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.9804 s, 7.5 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-ffff9497c520c000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.61731
Iter 1/10: OSS cache speed: 0.659916
Iter 1/10: ladvise speed: 0.657144
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.501663
Iter 2/10: OSS cache speed: 0.319542
Iter 2/10: ladvise speed: 0.429223
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.42436
Iter 3/10: OSS cache speed: 0.448586
Iter 3/10: ladvise speed: 0.292899
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.374717
Iter 4/10: OSS cache speed: 0.396155
Iter 4/10: ladvise speed: 0.349381
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.359066
Iter 5/10: OSS cache speed: 0.370518
Iter 5/10: ladvise speed: 0.396016
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.352601
Iter 6/10: OSS cache speed: 0.4044
Iter 6/10: ladvise speed: 0.435135
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.417027
Iter 7/10: OSS cache speed: 0.500786
Iter 7/10: ladvise speed: 0.518603
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.435446
Iter 8/10: OSS cache speed: 0.500155
Iter 8/10: ladvise speed: 0.530834
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.480262
Iter 9/10: OSS cache speed: 0.553111
Iter 9/10: ladvise speed: 0.566514
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.502557
Iter 10/10: OSS cache speed: 0.574109
Iter 10/10: ladvise speed: 0.560849
Average uncached read: .44
Average speedup with OSS cached read:  .47 = +6%
Average speedup with ladvise willread:  .47 = +6%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0