Displaying 15 results from an estimated 15 matches for "lo_thresh".
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hi_thresh
2018 Dec 28
0
[PATCH nbdkit 9/9] cache: Implement cache-max-size and method of reclaiming space from the cache.
...b/filters/cache/cache.h
index 50416b1..889414b 100644
--- a/filters/cache/cache.h
+++ b/filters/cache/cache.h
@@ -48,7 +48,18 @@ extern enum cache_mode {
CACHE_MODE_UNSAFE,
} cache_mode;
+/* Maximum size of the cache and high/low thresholds. */
+extern int64_t max_size;
+extern int hi_thresh, lo_thresh;
+
/* Cache read requests. */
extern bool cache_on_read;
+/* Do we support reclaiming cache blocks? */
+#ifdef FALLOC_FL_PUNCH_HOLE
+#define HAVE_CACHE_RECLAIM 1
+#else
+#undef HAVE_CACHE_RECLAIM
+#endif
+
#endif /* NBDKIT_CACHE_H */
diff --git a/filters/cache/blk.c b/filters/cache/blk.c
index...
[PATCH nbdkit v2 4/4] cache: Implement cache-max-size and method of reclaiming space from the cache.
2019 Jan 01
0
[PATCH nbdkit v2 4/4] cache: Implement cache-max-size and method of reclaiming space from the cache.
...bitmaps for a 1 TB underlying image.
* It is also smaller than the usual hole size for sparse files, which
@@ -48,7 +50,18 @@ extern enum cache_mode {
CACHE_MODE_UNSAFE,
} cache_mode;
+/* Maximum size of the cache and high/low thresholds. */
+extern int64_t max_size;
+extern int hi_thresh, lo_thresh;
+
/* Cache read requests. */
extern bool cache_on_read;
+/* Do we support reclaiming cache blocks? */
+#ifdef FALLOC_FL_PUNCH_HOLE
+#define HAVE_CACHE_RECLAIM 1
+#else
+#undef HAVE_CACHE_RECLAIM
+#endif
+
#endif /* NBDKIT_CACHE_H */
diff --git a/filters/cache/blk.c b/filters/cache/blk.c
index...
[PATCH nbdkit v3 2/2] cache: Implement cache-max-size and method of reclaiming space from the cache.
2019 Jan 03
0
[PATCH nbdkit v3 2/2] cache: Implement cache-max-size and method of reclaiming space from the cache.
...bitmaps for a 1 TB underlying image.
* It is also smaller than the usual hole size for sparse files, which
@@ -48,7 +50,18 @@ extern enum cache_mode {
CACHE_MODE_UNSAFE,
} cache_mode;
+/* Maximum size of the cache and high/low thresholds. */
+extern int64_t max_size;
+extern int hi_thresh, lo_thresh;
+
/* Cache read requests. */
extern bool cache_on_read;
+/* Do we support reclaiming cache blocks? */
+#ifdef FALLOC_FL_PUNCH_HOLE
+#define HAVE_CACHE_RECLAIM 1
+#else
+#undef HAVE_CACHE_RECLAIM
+#endif
+
#endif /* NBDKIT_CACHE_H */
diff --git a/filters/cache/blk.c b/filters/cache/blk.c
index...
[PATCH nbdkit v4 2/2] cache: Implement cache-max-size and method of reclaiming space from the cache.
2019 Jan 03
0
[PATCH nbdkit v4 2/2] cache: Implement cache-max-size and method of reclaiming space from the cache.
...bitmaps for a 1 TB underlying image.
* It is also smaller than the usual hole size for sparse files, which
@@ -48,6 +50,10 @@ extern enum cache_mode {
CACHE_MODE_UNSAFE,
} cache_mode;
+/* Maximum size of the cache and high/low thresholds. */
+extern int64_t max_size;
+extern int hi_thresh, lo_thresh;
+
/* Cache read requests. */
extern bool cache_on_read;
diff --git a/filters/cache/reclaim.h b/filters/cache/reclaim.h
new file mode 100644
index 0000000..a11a9f3
--- /dev/null
+++ b/filters/cache/reclaim.h
@@ -0,0 +1,48 @@
+/* nbdkit
+ * Copyright (C) 2018-2019 Red Hat Inc.
+ * All rights res...
2019 Jan 03
2
Re: [PATCH nbdkit v2 4/4] cache: Implement cache-max-size and method of reclaiming space from the cache.
...ks * UINT64_C(512);
Is that calculation always going to be accurate, even when more
disks/file systems move towards 4k minimum access?
> +
> + if (reclaiming) {
> + /* Keep reclaiming until the cache size drops below the low threshold. */
> + if (cache_allocated < max_size * lo_thresh / 100) {
> + nbdkit_debug ("cache: stop reclaiming");
> + reclaiming = NOT_RECLAIMING;
> + return;
> + }
> + }
> + else {
> + if (cache_allocated < max_size * hi_thresh / 100)
> + return;
> +
> + /* Start reclaiming if the ca...
[PATCH nbdkit v3 0/2] cache: Implement cache-max-size and method of reclaiming space from the cache.
2019 Jan 03
3
[PATCH nbdkit v3 0/2] cache: Implement cache-max-size and method of reclaiming space from the cache.
Patch 1 is the same as last time, except for a minor comment fix.
Patch 2 should address everything that Eric mentioned in his review,
and has been retested.
Rich.
2019 Sep 23
2
[PATCH nbdkit v2] server: public: Add nbdkit_parse_* functions for safely parsing integers.
.../filters/cache/cache.c
index 14a3c0a..faf6023 100644
--- a/filters/cache/cache.c
+++ b/filters/cache/cache.c
@@ -70,7 +70,7 @@ static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
unsigned blksize;
enum cache_mode cache_mode = CACHE_MODE_WRITEBACK;
int64_t max_size = -1;
-int hi_thresh = 95, lo_thresh = 80;
+unsigned hi_thresh = 95, lo_thresh = 80;
bool cache_on_read = false;
static int cache_flush (struct nbdkit_next_ops *next_ops, void *nxdata, void *handle, uint32_t flags, int *err);
@@ -129,22 +129,20 @@ cache_config (nbdkit_next_config *next, void *nxdata,
return 0;
}
else if...
2019 Jan 04
0
[PATCH nbdkit v5 3/3] cache: Implement cache-max-size and cache space reclaim.
...* Caching mode. */
extern enum cache_mode {
@@ -48,6 +43,13 @@ extern enum cache_mode {
CACHE_MODE_UNSAFE,
} cache_mode;
+/* Size of a block in the cache. */
+extern unsigned blksize;
+
+/* Maximum size of the cache and high/low thresholds. */
+extern int64_t max_size;
+extern int hi_thresh, lo_thresh;
+
/* Cache read requests. */
extern bool cache_on_read;
diff --git a/filters/cache/reclaim.h b/filters/cache/reclaim.h
new file mode 100644
index 0000000..d0692b6
--- /dev/null
+++ b/filters/cache/reclaim.h
@@ -0,0 +1,53 @@
+/* nbdkit
+ * Copyright (C) 2018-2019 Red Hat Inc.
+ * All rights res...
2019 Jan 01
7
[PATCH nbdkit v2 0/4] cache: Implement cache-max-size etc.
These are essentially identical to what was previously posted as
patches 6/9 through 9/9 here:
https://www.redhat.com/archives/libguestfs/2018-December/msg00145.html
except that it has been rebased onto the current git master and
retested thoroughly.
Rich.
2019 Sep 21
2
[PATCH nbdkit] server: public: Add nbdkit_parse_* functions for safely parsing integers.
.../filters/cache/cache.c
index 14a3c0a..faf6023 100644
--- a/filters/cache/cache.c
+++ b/filters/cache/cache.c
@@ -70,7 +70,7 @@ static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
unsigned blksize;
enum cache_mode cache_mode = CACHE_MODE_WRITEBACK;
int64_t max_size = -1;
-int hi_thresh = 95, lo_thresh = 80;
+unsigned hi_thresh = 95, lo_thresh = 80;
bool cache_on_read = false;
static int cache_flush (struct nbdkit_next_ops *next_ops, void *nxdata, void *handle, uint32_t flags, int *err);
@@ -129,22 +129,20 @@ cache_config (nbdkit_next_config *next, void *nxdata,
return 0;
}
else if...
2019 Jan 03
4
[PATCH nbdkit v4 0/2] cache: Implement cache-max-size and method of
v3 was broken by a bad rebase, so let's forget about that one.
Compared to v2:
- Patch 1 is the same except for a minor comment change.
- Patch 2 splits the reclaim code into a separate file
(filters/cache/reclaim.c)
- Addressed Eric's comments from his review of v2.
- Retested on Linux and FreeBSD.
2019 Sep 23
2
Re: [PATCH nbdkit] server: public: Add nbdkit_parse_* functions for safely parsing integers.
On Mon, Sep 23, 2019 at 12:05:11PM -0500, Eric Blake wrote:
> > + int nbdkit_parse_long (const char *what, const char *str, long *r);
> > + int nbdkit_parse_unsigned_long (const char *what,
> > + const char *str, unsigned long *r);
>
> Do we really want to encourage the use of parse_long and
> parse_unsigned_long? Those differ between
2018 Dec 28
12
[PATCH nbdkit 0/9] cache: Implement cache-max-size and method of reclaiming space from the cache.
This patch series enhances the cache filter in a few ways, primarily
adding a "cache-on-read" feature (similar to qemu's copyonread); and
adding the ability to limit the cache size and the antecedent of that
which is having a method to reclaim cache blocks.
As the cache is stored as a sparse temporary file, reclaiming cache
blocks simply means punching holes in the temporary file.
2019 Jan 04
5
[PATCH nbdkit v5 3/3] cache: Implement cache-max-size and cache space reclaim.
v4:
https://www.redhat.com/archives/libguestfs/2019-January/msg00032.html
v5:
- Now we set the block size at run time.
I'd like to say that I was able to test this change, but
unfortunately I couldn't find any easy way to create a filesystem
on x86-64 with a block size > 4K. Ext4 doesn't support it at all,
and XFS doesn't support block size > page size (and I
2019 Sep 23
0
Re: [PATCH nbdkit] server: public: Add nbdkit_parse_* functions for safely parsing integers.
...ed contract that *r is
unchanged if we return -1?
> +++ b/filters/cache/cache.c
> @@ -70,7 +70,7 @@ static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
> unsigned blksize;
> enum cache_mode cache_mode = CACHE_MODE_WRITEBACK;
> int64_t max_size = -1;
> -int hi_thresh = 95, lo_thresh = 80;
> +unsigned hi_thresh = 95, lo_thresh = 80;
So you're fixing typing errors at the same time as using the new helper
functions. Makes the patch a bit bigger to review, but it's not worth
the effort to split it now.
> bool cache_on_read = false;
>
> static int cache_fl...