== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:41:45 (1736786505)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.42904 s, 43.2 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-ffff8800b624c000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.49561
Iter 1/10: OSS cache speed: 1.74981
Iter 1/10: ladvise speed: 1.89223
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.57565
Iter 2/10: OSS cache speed: 1.72297
Iter 2/10: ladvise speed: 1.78827
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.47069
Iter 3/10: OSS cache speed: 1.60406
Iter 3/10: ladvise speed: 1.67925
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.34895
Iter 4/10: OSS cache speed: 1.65864
Iter 4/10: ladvise speed: 1.62972
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.43325
Iter 5/10: OSS cache speed: 1.668
Iter 5/10: ladvise speed: 1.63268
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.44402
Iter 6/10: OSS cache speed: 1.59368
Iter 6/10: ladvise speed: 1.61546
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.37051
Iter 7/10: OSS cache speed: 1.5939
Iter 7/10: ladvise speed: 1.63713
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.40984
Iter 8/10: OSS cache speed: 1.59018
Iter 8/10: ladvise speed: 1.66337
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.37402
Iter 9/10: OSS cache speed: 1.6314
Iter 9/10: ladvise speed: 1.62105
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.38167
Iter 10/10: OSS cache speed: 1.60322
Iter 10/10: ladvise speed: 1.62169
Average uncached read: 1.43
Average speedup with OSS cached read:  1.64 = +14%
Average speedup with ladvise willread:  1.67 = +16%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0