== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:23:57 (1787394237)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.6436 s, 9.9 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-ffff8fff4645d000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.441774
Iter 1/10: OSS cache speed: 0.459181
Iter 1/10: ladvise speed: 0.436738
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.433436
Iter 2/10: OSS cache speed: 0.487873
Iter 2/10: ladvise speed: 0.459451
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.495437
Iter 3/10: OSS cache speed: 0.485244
Iter 3/10: ladvise speed: 0.431985
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.381051
Iter 4/10: OSS cache speed: 0.445684
Iter 4/10: ladvise speed: 0.391852
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.397527
Iter 5/10: OSS cache speed: 0.385021
Iter 5/10: ladvise speed: 0.453607
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.373619
Iter 6/10: OSS cache speed: 0.454572
Iter 6/10: ladvise speed: 0.54336
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.428075
Iter 7/10: OSS cache speed: 0.529909
Iter 7/10: ladvise speed: 0.395645
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.532261
Iter 8/10: OSS cache speed: 0.612918
Iter 8/10: ladvise speed: 0.489335
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.433999
Iter 9/10: OSS cache speed: 0.530718
Iter 9/10: ladvise speed: 0.562318
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.457749
Iter 10/10: OSS cache speed: 0.518101
Iter 10/10: ladvise speed: 0.499296
Average uncached read: .43
Average speedup with OSS cached read:  .49 = +13%
Average speedup with ladvise willread:  .46 = +6%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0