search for: 1giga

Hello find /etc -size -1G should return all files less than 1Giga byte in /etc, but return a list of empty file (size=0) find /etc -size -2G work fine and return all the files This works the same on my fedora11 and my centos 5 ! Did I miss something or is it a bug ? Regards -- Alain Spineux | aspineux gmail com Your email 100% ava...

...comments: 1. allocate a bunch of pages and link them up, calculating the min and the max pfn. if max-min exceeds the allocated bitmap size, tell host. 2. limit allocated bitmap size to something reasonable. How about 32Kbytes? This is 256kilo bit in the map, which comes out to 1Giga bytes of memory in the balloon. ------------------------------------------------------------------------------------- Because the PFNs of the allocated pages are not linear increased, so 3 transmissions are impossible. Liang > > > the call count of madvise: 865 > > > > bef...

...comments: 1. allocate a bunch of pages and link them up, calculating the min and the max pfn. if max-min exceeds the allocated bitmap size, tell host. 2. limit allocated bitmap size to something reasonable. How about 32Kbytes? This is 256kilo bit in the map, which comes out to 1Giga bytes of memory in the balloon. ------------------------------------------------------------------------------------- Because the PFNs of the allocated pages are not linear increased, so 3 transmissions are impossible. Liang > > > the call count of madvise: 865 > > > > bef...

...if the guest is not idle, or the guest has more RAM. Do you want more data? Is it worth to do that? Liang > > > > > 2. limit allocated bitmap size to something reasonable. > > > How about 32Kbytes? This is 256kilo bit in the map, which comes > > > out to 1Giga bytes of memory in the balloon. > > > > So, even the VM has 1TB of RAM, the page bitmap will take 32MB of > memory. > > Maybe it's better to use a big page bitmap the save the pages > > allocated by balloon, and split the big page bitmap to 32K bytes unit, then > t...

...if the guest is not idle, or the guest has more RAM. Do you want more data? Is it worth to do that? Liang > > > > > 2. limit allocated bitmap size to something reasonable. > > > How about 32Kbytes? This is 256kilo bit in the map, which comes > > > out to 1Giga bytes of memory in the balloon. > > > > So, even the VM has 1TB of RAM, the page bitmap will take 32MB of > memory. > > Maybe it's better to use a big page bitmap the save the pages > > allocated by balloon, and split the big page bitmap to 32K bytes unit, then > t...

...of pages and link them up, > calculating the min and the max pfn. > if max-min exceeds the allocated bitmap size, > tell host. > 2. limit allocated bitmap size to something reasonable. > How about 32Kbytes? This is 256kilo bit in the map, which comes > out to 1Giga bytes of memory in the balloon. > ------------------------------------------------------------------------------------- > Because the PFNs of the allocated pages are not linear increased, so 3 transmissions > are impossible. > > > Liang Interesting. How about instead of tell h...

...e CD doesn;t boot. I upgraded to Syslinux 2.0 but with no luck. The error message I got almost says it all: "Extremely broken BIOS", but can I ask for help if there some ideas how to fix this, cause if I put the HDD back the CD boots without any problem. The hardware: CPU: VIA C3 Samuel2 1Giga Pro lspci output: 00:00.0 Host bridge: VIA Technologies, Inc. VT8601 [Apollo ProMedia] (rev 05) 00:01.0 PCI bridge: VIA Technologies, Inc. VT8601 [Apollo ProMedia AGP] 00:07.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South] (rev 40) 00:07.1 IDE interface: VIA Technologies, Inc. Bu...

...t; > calculating the min and the max pfn. > > if max-min exceeds the allocated bitmap size, > > tell host. > > 2. limit allocated bitmap size to something reasonable. > > How about 32Kbytes? This is 256kilo bit in the map, which comes > > out to 1Giga bytes of memory in the balloon. > > ---------------------------------------------------------------------- > > --------------- Because the PFNs of the allocated pages are not linear > > increased, so 3 transmissions are impossible. > > > > > > Liang > > I...

...t; > calculating the min and the max pfn. > > if max-min exceeds the allocated bitmap size, > > tell host. > > 2. limit allocated bitmap size to something reasonable. > > How about 32Kbytes? This is 256kilo bit in the map, which comes > > out to 1Giga bytes of memory in the balloon. > > ---------------------------------------------------------------------- > > --------------- Because the PFNs of the allocated pages are not linear > > increased, so 3 transmissions are impossible. > > > > > > Liang > > I...

...#39;s a tradeoff for sure. Measure it, see what the overhead is. OK, I will try and get back to you. > > > > > > 2. limit allocated bitmap size to something reasonable. > > > How about 32Kbytes? This is 256kilo bit in the map, which comes > > > out to 1Giga bytes of memory in the balloon. > > > > So, even the VM has 1TB of RAM, the page bitmap will take 32MB of > memory. > > Maybe it's better to use a big page bitmap the save the pages > > allocated by balloon, and split the big page bitmap to 32K bytes unit, then > t...

...#39;s a tradeoff for sure. Measure it, see what the overhead is. OK, I will try and get back to you. > > > > > > 2. limit allocated bitmap size to something reasonable. > > > How about 32Kbytes? This is 256kilo bit in the map, which comes > > > out to 1Giga bytes of memory in the balloon. > > > > So, even the VM has 1TB of RAM, the page bitmap will take 32MB of > memory. > > Maybe it's better to use a big page bitmap the save the pages > > allocated by balloon, and split the big page bitmap to 32K bytes unit, then > t...

...o that? > > Liang Either my math is wrong or there's an implementation bug. > > > > > > > 2. limit allocated bitmap size to something reasonable. > > > > How about 32Kbytes? This is 256kilo bit in the map, which comes > > > > out to 1Giga bytes of memory in the balloon. > > > > > > So, even the VM has 1TB of RAM, the page bitmap will take 32MB of > > memory. > > > Maybe it's better to use a big page bitmap the save the pages > > > allocated by balloon, and split the big page bitmap to 32...

...t; limit is very frequently to be true. Then, there will be many times of virtio transmission and it's bad for performance improvement. Right? > 2. limit allocated bitmap size to something reasonable. > How about 32Kbytes? This is 256kilo bit in the map, which comes > out to 1Giga bytes of memory in the balloon. So, even the VM has 1TB of RAM, the page bitmap will take 32MB of memory. Maybe it's better to use a big page bitmap the save the pages allocated by balloon, and split the big page bitmap to 32K bytes unit, then transfer one unit at a time. Should we use a pag...

...t; limit is very frequently to be true. Then, there will be many times of virtio transmission and it's bad for performance improvement. Right? > 2. limit allocated bitmap size to something reasonable. > How about 32Kbytes? This is 256kilo bit in the map, which comes > out to 1Giga bytes of memory in the balloon. So, even the VM has 1TB of RAM, the page bitmap will take 32MB of memory. Maybe it's better to use a big page bitmap the save the pages allocated by balloon, and split the big page bitmap to 32K bytes unit, then transfer one unit at a time. Should we use a pag...

...he min and the max pfn. > > > if max-min exceeds the allocated bitmap size, > > > tell host. > > > 2. limit allocated bitmap size to something reasonable. > > > How about 32Kbytes? This is 256kilo bit in the map, which comes > > > out to 1Giga bytes of memory in the balloon. > > > ---------------------------------------------------------------------- > > > --------------- Because the PFNs of the allocated pages are not linear > > > increased, so 3 transmissions are impossible. > > > > > > &gt...

...ee what the overhead is. > > OK, I will try and get back to you. > > > > > > > > > > 2. limit allocated bitmap size to something reasonable. > > > > How about 32Kbytes? This is 256kilo bit in the map, which comes > > > > out to 1Giga bytes of memory in the balloon. > > > > > > So, even the VM has 1TB of RAM, the page bitmap will take 32MB of > > memory. > > > Maybe it's better to use a big page bitmap the save the pages > > > allocated by balloon, and split the big page bitmap to 32...

...comments: 1. allocate a bunch of pages and link them up, calculating the min and the max pfn. if max-min exceeds the allocated bitmap size, tell host. 2. limit allocated bitmap size to something reasonable. How about 32Kbytes? This is 256kilo bit in the map, which comes out to 1Giga bytes of memory in the balloon. > -- > 1.9.1

...and it's bad for performance > improvement. Right? It's a tradeoff for sure. Measure it, see what the overhead is. > > > 2. limit allocated bitmap size to something reasonable. > > How about 32Kbytes? This is 256kilo bit in the map, which comes > > out to 1Giga bytes of memory in the balloon. > > So, even the VM has 1TB of RAM, the page bitmap will take 32MB of memory. > Maybe it's better to use a big page bitmap the save the pages allocated by balloon, > and split the big page bitmap to 32K bytes unit, then transfer one unit at a time....

The implementation of the current virtio-balloon is not very efficient, Bellow is test result of time spends on inflating the balloon to 3GB of a 4GB idle guest: a. allocating pages (6.5%, 103ms) b. sending PFNs to host (68.3%, 787ms) c. address translation (6.1%, 96ms) d. madvise (19%, 300ms) It takes about 1577ms for the whole inflating process to complete. The test shows that the bottle neck

The implementation of the current virtio-balloon is not very efficient, Bellow is test result of time spends on inflating the balloon to 3GB of a 4GB idle guest: a. allocating pages (6.5%, 103ms) b. sending PFNs to host (68.3%, 787ms) c. address translation (6.1%, 96ms) d. madvise (19%, 300ms) It takes about 1577ms for the whole inflating process to complete. The test shows that the bottle neck