== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 14:21:35 (1772911295)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.76882 s, 15.5 MB/s
llite.lustre-ffff9c4f2fa6b000.read_ahead_stats=clear
llite.lustre-ffff9c4f2fa6b000.read_ahead_stats=
snapshot_time             1772911310.431020354 secs.nsecs
start_time                1772911303.611440267 secs.nsecs
elapsed_time              6.819580087 secs.nsecs
hits                      25567 samples [pages]
misses                    33 samples [pages]
zero_size_window          3 samples [pages]
async_readahead           2 samples [pages]
failed_to_fast_read       36 samples [pages]
mmap_range_read           28 samples [pages]
readahead_pages           35 samples [pages] 8 4096 25567
/usr/bin/fio
thp                     : Memory Advise Huge Page
read_test: (g=0): rw=read, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=mmap, iodepth=1
fio-3.19
Starting 1 process

read_test: (groupid=0, jobs=1): err= 0: pid=301729: Sat Mar  7 14:29:44 2026
  read: IOPS=10, BW=10.9MiB/s (11.4MB/s)(5120MiB/471484msec)
    clat (msec): min=49, max=320, avg=91.91, stdev=48.27
     lat (msec): min=49, max=320, avg=91.91, stdev=48.27
    clat percentiles (msec):
     |  1.00th=[   53],  5.00th=[   58], 10.00th=[   61], 20.00th=[   64],
     | 30.00th=[   67], 40.00th=[   71], 50.00th=[   74], 60.00th=[   79],
     | 70.00th=[   84], 80.00th=[   96], 90.00th=[  157], 95.00th=[  213],
     | 99.00th=[  279], 99.50th=[  288], 99.90th=[  296], 99.95th=[  305],
     | 99.99th=[  321]
   bw (  KiB/s): min= 2048, max=18432, per=100.00%, avg=11150.39, stdev=4438.23, samples=940
   iops        : min=    2, max=   18, avg=10.88, stdev= 4.33, samples=940
  lat (msec)   : 50=0.21%, 100=81.33%, 250=16.37%, 500=2.09%
  cpu          : usr=0.57%, sys=87.23%, ctx=12000, majf=5120, minf=1305868
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=5120,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=10.9MiB/s (11.4MB/s), 10.9MiB/s-10.9MiB/s (11.4MB/s-11.4MB/s), io=5120MiB (5369MB), run=471484-471484msec