== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:14:38 (1712477678)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.05008 s, 51.1 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
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.45652
Iter 1/10: OSS cache speed: 1.43976
Iter 1/10: ladvise speed: 1.40192
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.37468
Iter 2/10: OSS cache speed: 1.37692
Iter 2/10: ladvise speed: 1.38835
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.40467
Iter 3/10: OSS cache speed: 1.40027
Iter 3/10: ladvise speed: 1.39896
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.39218
Iter 4/10: OSS cache speed: 1.63459
Iter 4/10: ladvise speed: 1.50351
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.68781
Iter 5/10: OSS cache speed: 1.50385
Iter 5/10: ladvise speed: 2.72891
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.47861
Iter 6/10: OSS cache speed: 2.60836
Iter 6/10: ladvise speed: 2.51368
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.5114
Iter 7/10: OSS cache speed: 2.67172
Iter 7/10: ladvise speed: 2.82048
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.50216
Iter 8/10: OSS cache speed: 2.49627
Iter 8/10: ladvise speed: 2.8834
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.596692
Iter 9/10: OSS cache speed: 0.364319
Iter 9/10: ladvise speed: 0.660222
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.02978
Iter 10/10: OSS cache speed: 1.27049
Iter 10/10: ladvise speed: 1.35042
Average uncached read: 1.64
Average speedup with OSS cached read: 1.67 = +1.82%
Average speedup with ladvise willread: 1.86 = +13.41%
Speedup with OSS cached read less than 20%, got 1.82%. Skipping ladvise willread check.
fail_loc=0