== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:43:28 (1747849408)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.19802 s, 32.8 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-ffff8800abfb0000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.46317
Iter 1/10: OSS cache speed: 1.64889
Iter 1/10: ladvise speed: 1.64468
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.39946
Iter 2/10: OSS cache speed: 1.75667
Iter 2/10: ladvise speed: 1.5108
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.48368
Iter 3/10: OSS cache speed: 1.91587
Iter 3/10: ladvise speed: 1.86141
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.58109
Iter 4/10: OSS cache speed: 2.2654
Iter 4/10: ladvise speed: 2.33574
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.92777
Iter 5/10: OSS cache speed: 2.05132
Iter 5/10: ladvise speed: 1.88106
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.88567
Iter 6/10: OSS cache speed: 2.00923
Iter 6/10: ladvise speed: 2.58838
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.64284
Iter 7/10: OSS cache speed: 1.44606
Iter 7/10: ladvise speed: 1.77408
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.62285
Iter 8/10: OSS cache speed: 2.10668
Iter 8/10: ladvise speed: 2.66533
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.50187
Iter 9/10: OSS cache speed: 2.98629
Iter 9/10: ladvise speed: 3.30739
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.70698
Iter 10/10: OSS cache speed: 2.96693
Iter 10/10: ladvise speed: 2.95154
Average uncached read: 1.82
Average speedup with OSS cached read:  2.11 = +15%
Average speedup with ladvise willread:  2.25 = +23%
Speedup with OSS cached read less than 20%,  got 15%. Skipping ladvise willread check.
fail_loc=0