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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-06-16 16:59:00 +0000 |
|---|---|---|
| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-06-16 16:59:33 +0000 |
| commit | 9aba81d8eb048db908c94a3c40c25a5fde0caee6 (patch) | |
| tree | b765e7fb5e9a3c2143c68b0414e0055adb70e785 /results/classifier/118/performance/1768 | |
| parent | b89a938452613061c0f1f23e710281cf5c83cb29 (diff) | |
| download | qemu-analysis-9aba81d8eb048db908c94a3c40c25a5fde0caee6.tar.gz qemu-analysis-9aba81d8eb048db908c94a3c40c25a5fde0caee6.zip | |
add 18th iteration of classifier
Diffstat (limited to 'results/classifier/118/performance/1768')
| -rw-r--r-- | results/classifier/118/performance/1768 | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/results/classifier/118/performance/1768 b/results/classifier/118/performance/1768 new file mode 100644 index 000000000..9d55119af --- /dev/null +++ b/results/classifier/118/performance/1768 @@ -0,0 +1,62 @@ +performance: 0.967 +user-level: 0.868 +architecture: 0.858 +TCG: 0.843 +mistranslation: 0.839 +graphic: 0.794 +device: 0.756 +x86: 0.548 +assembly: 0.541 +debug: 0.538 +kernel: 0.524 +vnc: 0.511 +hypervisor: 0.483 +arm: 0.466 +risc-v: 0.462 +semantic: 0.438 +i386: 0.415 +peripherals: 0.402 +ppc: 0.392 +network: 0.338 +socket: 0.336 +PID: 0.321 +VMM: 0.314 +boot: 0.307 +files: 0.288 +virtual: 0.218 +permissions: 0.165 +register: 0.159 +KVM: 0.084 + +Could not allocate more than ~2GB with qemu-user +Description of problem: +On qemu-user, failed to allocate more than about 2GB on 32bit platform supporting up to 4GB (arm, ppc, etc.) +Steps to reproduce: +1. Try to allocate more than 2GB [e.g. for(i=0;i<64;i++) if(malloc(64*1024*1024)==NULL) perror("Failed to allocate 64MB");] +2. Only 1 64MB chunck is allocated in the upper 2GB memory space +3. Failed to allocate after about 2GB. +Additional information: +The problem is in **pageflags_find** and **pageflags_next** functions (found in _accel/tcg/user-exec.c_) 3rd parameters, that should be **target_ulong** instead of incorrect _target_long_ (the parameter will be converted signed extended to uint64_t). +The testing program is the following: +``` +#include <stdio.h> +#include <stdlib.h> + +int main(int argc,char *argv[]) { + unsigned int a; + unsigned int i; + char *al; + unsigned int sss=1U*1024*1024*64; + for(a=0;a<128;a++) { + al=malloc(sss); + if(al!=NULL) { + printf("ALLOC OK %u (%08lX)!\n",sss*(a+1),al); + } + else { + printf("Cannot alloc %d\n",(a+1)*sss); + perror("Cannot alloc"); + exit(1); + } + } +} +``` |