Displaying 5 results from an estimated 5 matches for "avg_idle".
2010 Nov 18
9
Interesting problem with write data.
Hi,
Recently, I made a btrfs to use. And I met slowness problem. Trying
to diag it. I found this:
1. dd if=/dev/zero of=test count=1024 bs=1MB
This is fast, at about 25MB/s, and reasonable iowait.
2. dd if=/dev/zero of=test count=1 bs=1GB
This is pretty slow, at about 1.5MB/s, and 90%+ iowait, constantly.
May I know why it works like this? Thanks.
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2012 Sep 12
2
Deadlock in btrfs-cleaner, related to snapshot deletion
...: 0
[ 386.319965] .cpu_load[3] : 0
[ 386.319967] .cpu_load[4] : 0
[ 386.319970] .yld_count : 0
[ 386.319973] .sched_count : 445110
[ 386.319976] .sched_goidle : 198003
[ 386.319979] .avg_idle : 1000000
[ 386.319982] .ttwu_count : 184667
[ 386.319985] .ttwu_local : 178809
[ 386.319990]
[ 386.319990] cfs_rq[0]:/autogroup-47
[ 386.319994] .exec_clock : 13.273210
[ 386.319998] .MIN_vruntime...
2017 Oct 18
2
Null deference panic in CentOS-6.5
...active_balance = 0,
push_cpu = 20,
cpu = 4,
online = 1,
avg_load_per_task = 342,
migration_thread = 0xffff882052c4c040,
migration_queue = {
next = 0xffff88013bc57140,
prev = 0xffff88013bc57140
},
rt_avg = 11804,
age_stamp = 70548000000000,
idle_stamp = 0,
avg_idle = 1000000,
prev_steal_time = 0,
calc_load_update = 4365161392,
calc_load_active = 19,
hrtick_csd_pending = 0,
hrtick_csd = {
list = {
next = 0x0,
prev = 0x0
},
func = 0xffffffff8105aff0 <__hrtick_start>,
info = 0xffff88013bc56840,
flags = 0,...
2012 Jul 31
2
Btrfs Intermittent ENOSPC Issues
I''ve been working on running down intermittent ENOSPC issues.
I can only seem to replicate ENOSPC errors when running zlib
compression. However, I have been seeing similar ENOSPC errors to a
lesser extent when playing with the LZ4HC patches.
I apologize for not following up on this sooner, but I had drifted
away from using zlib, and didn''t notice there was still an issue.
My
2012 Aug 01
7
[PATCH] Btrfs: barrier before waitqueue_active
We need an smb_mb() before waitqueue_active to avoid missing wakeups.
Before Mitch was hitting a deadlock between the ordered flushers and the
transaction commit because the ordered flushers were waiting for more refs
and were never woken up, so those smp_mb()''s are the most important.
Everything else I added for correctness sake and to avoid getting bitten by
this again somewhere else.